{"title":"PETG Coating","description":"\u003cstyle\u003e\n  \/* ── Siraya Tech Design Tokens ── *\/\n  .rte {\n    --st-black:      #1a1a1a;\n    --st-blue:       #297fce;\n    --st-blue-dk:    #1e63a6;\n    --st-white:      #ffffff;\n    --st-primary:    #cb1a36;\n    --st-primary-dk: #a01228;\n    --st-gray-light: #f4f4f4;\n    --st-gray-mid:   #e0e0e0;\n    --st-gray-text:  #555555;\n    --st-border:     #d8d8d8;\n    --st-radius:     6px;\n    --st-font:       'Helvetica Neue', Arial, sans-serif;\n    font-family: var(--st-font);\n    color: var(--st-black);\n    line-height: 1.7;\n    max-width: 900px;\n    margin: 0 auto;\n  }\n\n  \/* ── Intro paragraph ── *\/\n  .rte .st-intro {\n    font-size: 1.08rem;\n    color: var(--st-gray-text);\n    margin-bottom: 2rem;\n    border-left: 4px solid var(--st-primary);\n    padding-left: 1rem;\n  }\n\n  \/* ── Section headings ── *\/\n  .rte h2 {\n    font-size: 1.3rem;\n    font-weight: 700;\n    color: var(--st-black);\n    border-bottom: 2px solid var(--st-primary);\n    padding-bottom: 0.35rem;\n    margin-top: 2.5rem;\n    margin-bottom: 1rem;\n    letter-spacing: 0.01em;\n  }\n\n  \/* ── Bullet lists ── *\/\n  .rte ul {\n    margin: 0.75rem 0 1.25rem 0;\n    padding-left: 1.4rem;\n  }\n  .rte ul li {\n    margin-bottom: 0.45rem;\n    line-height: 1.65;\n  }\n  .rte ul li strong {\n    color: var(--st-black);\n  }\n\n  \/* ── Product card grid ── *\/\n  .rte .st-product-grid {\n    display: grid;\n    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));\n    gap: 1rem;\n    margin: 1.25rem 0 2rem;\n  }\n  .rte .st-product-card {\n    background: var(--st-gray-light);\n    border: 1px solid var(--st-border);\n    border-radius: var(--st-radius);\n    padding: 1.1rem 1.2rem;\n  }\n  .rte .st-product-card .st-card-title {\n    font-weight: 700;\n    font-size: 0.95rem;\n    color: var(--st-black);\n    margin-bottom: 0.4rem;\n  }\n  .rte .st-product-card .st-badge {\n    display: inline-block;\n    background: var(--st-primary);\n    color: var(--st-white);\n    font-size: 0.72rem;\n    font-weight: 700;\n    border-radius: 4px;\n    padding: 2px 7px;\n    margin-bottom: 0.5rem;\n    letter-spacing: 0.04em;\n    text-transform: uppercase;\n  }\n  .rte .st-product-card p {\n    font-size: 0.87rem;\n    color: var(--st-gray-text);\n    margin: 0.35rem 0 0.7rem;\n    line-height: 1.55;\n  }\n  .rte .st-product-card a.st-btn {\n    display: inline-block;\n    background: var(--st-primary);\n    color: var(--st-white);\n    font-size: 0.82rem;\n    font-weight: 700;\n    padding: 6px 14px;\n    border-radius: var(--st-radius);\n    text-decoration: none;\n    transition: background 0.2s;\n  }\n  .rte .st-product-card a.st-btn:hover {\n    background: var(--st-primary-dk);\n  }\n\n  \/* ── Spec table ── *\/\n  .rte .st-spec-table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 0.9rem;\n    margin: 1rem 0 1.5rem;\n  }\n  .rte .st-spec-table th {\n    background: var(--st-blue);\n    color: var(--st-white);\n    text-align: left;\n    padding: 0.6rem 0.8rem;\n    font-weight: 700;\n    font-size: 0.85rem;\n  }\n  .rte .st-spec-table td {\n    padding: 0.55rem 0.8rem;\n    border-bottom: 1px solid var(--st-border);\n    vertical-align: top;\n  }\n  .rte .st-spec-table tr:nth-child(even) td {\n    background: var(--st-gray-light);\n  }\n\n  \/* ── Compatibility table ── *\/\n  .rte .st-compat-table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 0.88rem;\n    margin: 1rem 0 1.5rem;\n  }\n  .rte .st-compat-table th {\n    background: var(--st-primary);\n    color: var(--st-white);\n    padding: 0.55rem 0.75rem;\n    font-weight: 700;\n    text-align: center;\n    font-size: 0.83rem;\n  }\n  .rte .st-compat-table td {\n    padding: 0.5rem 0.75rem;\n    border: 1px solid var(--st-border);\n    text-align: center;\n    vertical-align: middle;\n  }\n  .rte .st-compat-table td:first-child {\n    text-align: left;\n    font-weight: 600;\n  }\n  .rte .st-compat-table tr:nth-child(even) td {\n    background: var(--st-gray-light);\n  }\n  .rte .st-yes  { color: #2a8a2a; font-weight: 700; }\n  .rte .st-no   { color: #cc2222; font-weight: 700; }\n  .rte .st-cond { color: #b87800; font-weight: 700; }\n\n  \/* ── Callout box ── *\/\n  .rte .st-callout {\n    background: var(--st-gray-light);\n    border-left: 4px solid var(--st-primary);\n    border-radius: var(--st-radius);\n    padding: 1rem 1.2rem;\n    margin: 1.25rem 0;\n  }\n  .rte .st-callout p {\n    margin: 0;\n    font-size: 0.93rem;\n    color: var(--st-black);\n  }\n\n  \/* ── FAQ accordion ── *\/\n  .rte .st-faq { margin: 1rem 0; }\n  .rte .st-faq details {\n    border: 1px solid var(--st-border);\n    border-radius: var(--st-radius);\n    margin-bottom: 0.6rem;\n    background: var(--st-white);\n    overflow: hidden;\n  }\n  .rte .st-faq details[open] {\n    border-color: var(--st-primary);\n  }\n  .rte .st-faq summary {\n    padding: 0.8rem 1.1rem;\n    font-weight: 700;\n    font-size: 0.93rem;\n    cursor: pointer;\n    list-style: none;\n    display: flex;\n    justify-content: space-between;\n    align-items: center;\n    background: var(--st-gray-light);\n    color: var(--st-black);\n  }\n  .rte .st-faq summary::-webkit-details-marker { display: none; }\n  .rte .st-faq summary::after {\n    content: '+';\n    font-size: 1.2rem;\n    color: var(--st-primary);\n    font-weight: 900;\n    flex-shrink: 0;\n    margin-left: 0.5rem;\n  }\n  .rte .st-faq details[open] summary::after { content: '–'; }\n  .rte .st-faq .st-faq-body {\n    padding: 0.85rem 1.1rem;\n    font-size: 0.9rem;\n    line-height: 1.65;\n    color: var(--st-gray-text);\n    border-top: 1px solid var(--st-border);\n  }\n  .rte .st-faq .st-faq-body ul {\n    margin: 0.5rem 0 0 0;\n    padding-left: 1.3rem;\n  }\n\n  \/* ── Related links ── *\/\n  .rte .st-related-links {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 0.6rem;\n    margin: 1rem 0 2rem;\n  }\n  .rte .st-related-links a {\n    background: var(--st-gray-light);\n    border: 1px solid var(--st-border);\n    border-radius: var(--st-radius);\n    color: var(--st-black);\n    font-size: 0.87rem;\n    font-weight: 600;\n    padding: 0.4rem 0.9rem;\n    text-decoration: none;\n    transition: border-color 0.2s, color 0.2s;\n  }\n  .rte .st-related-links a:hover {\n    border-color: var(--st-primary);\n    color: var(--st-primary);\n  }\n\n  \/* ── Section divider ── *\/\n  .rte .st-divider {\n    border: none;\n    border-top: 1px solid var(--st-gray-mid);\n    margin: 2rem 0;\n  }\n\n  @media (max-width: 600px) {\n    .rte h2 { font-size: 1.1rem; }\n    .rte .st-spec-table, .rte .st-compat-table { font-size: 0.8rem; }\n    .rte .st-product-grid { grid-template-columns: 1fr; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"rte\"\u003e\n  \u003cp class=\"st-intro\"\u003ePETG coating refers to applying a UV-curable resin or surface treatment over a PETG 3D print to eliminate layer lines, seal the surface, and dramatically improve chemical resistance, moisture resistance, and appearance. Siraya Tech's coating resins are formulated specifically for FDM-printed parts, including PETG, and cure in minutes under a standard UV lamp or sunlight.\u003c\/p\u003e\n\n    \u003c!-- SECTION 1 --\u003e\n  \u003ch2\u003eWhat Is PETG Coating?\u003c\/h2\u003e\n  \u003cp\u003ePETG is one of the most popular FDM filaments because it balances ease of printing with good toughness and chemical resistance. However, like all FDM prints, raw PETG parts have visible layer lines, a slightly porous surface, and limited resistance to prolonged moisture or chemical exposure. PETG coating solves all three problems in one step.\u003c\/p\u003e\n  \u003cp\u003eA coating resin is brushed, poured, or dip-applied over the printed part. The liquid fills layer lines and surface pores, then hardens under UV light into a smooth, durable shell. The result looks and performs closer to an injection-molded part than a raw print.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEliminate visible layer lines\u003c\/strong\u003e without sanding\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSeal the surface\u003c\/strong\u003e against moisture, sweat, and light chemical exposure\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eImprove impact resistance\u003c\/strong\u003e and surface hardness\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAchieve a glossy, matte, or semi-gloss finish\u003c\/strong\u003e depending on the coating chosen\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrepare the surface\u003c\/strong\u003e for painting or further post-processing\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIncrease part lifespan\u003c\/strong\u003e in outdoor or humid environments\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"st-divider\"\u003e\n\n  \u003c!-- SECTION 2 --\u003e\n  \u003ch2\u003eWhy PETG Specifically Benefits from Coating\u003c\/h2\u003e\n  \u003cp\u003ePETG already has better moisture and chemical resistance than PLA, but it has key weaknesses that coating directly addresses:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLayer line porosity:\u003c\/strong\u003e PETG prints with slightly more inter-layer gaps than well-tuned PLA prints. Moisture, bacteria, and contaminants can accumulate in these gaps over time. A coating resin seals the surface completely.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUV yellowing:\u003c\/strong\u003e Uncoated PETG can yellow or become brittle with prolonged UV exposure outdoors. A UV-stable coating resin adds a protective barrier that slows this degradation significantly.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSurface hardness:\u003c\/strong\u003e Raw PETG surfaces scratch relatively easily. A cured coating resin adds a harder outer shell that resists everyday abrasion.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eThis makes PETG coating especially valuable for:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eOutdoor enclosures and housings\u003c\/li\u003e\n    \u003cli\u003eFood-contact-adjacent containers\u003c\/li\u003e\n    \u003cli\u003eDisplay models and prototypes that need a professional finish\u003c\/li\u003e\n    \u003cli\u003eFunctional parts exposed to cleaning chemicals or light solvents\u003c\/li\u003e\n    \u003cli\u003eMedical device prototyping and presentation models\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"st-divider\"\u003e\n\n  \u003c!-- SECTION 3: PRODUCT CARDS --\u003e\n  \u003ch2\u003eSiraya Tech Coating Products for PETG Prints\u003c\/h2\u003e\n  \u003cp\u003eSiraya Tech offers two primary coating solutions designed for FDM-printed parts including PETG:\u003c\/p\u003e\n\n  \u003cdiv class=\"st-product-grid\"\u003e\n\n    \u003cdiv class=\"st-product-card\"\u003e\n      \u003cdiv class=\"st-badge\"\u003eBest for Layer Lines\u003c\/div\u003e\n      \u003cdiv class=\"st-card-title\"\u003eBuild Coat\u003c\/div\u003e\n      \u003cp\u003eA thick, self-leveling UV coating resin designed to fill layer lines in a single application. Brush or pour onto the surface, let it self-level, then cure under a UV lamp for 2 to 5 minutes. Cures water-clear. Best for parts where eliminating layer lines is the primary goal.\u003c\/p\u003e\n      \u003ca href=\"https:\/\/siraya.tech\/products\/build-coat\" class=\"st-btn\"\u003eShop Build Coat\u003c\/a\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"st-product-card\"\u003e\n      \u003cdiv class=\"st-badge\"\u003eFlexible Coating\u003c\/div\u003e\n      \u003cdiv class=\"st-card-title\"\u003eTenacious (Coating Use)\u003c\/div\u003e\n      \u003cp\u003eSiraya Tech's flexible, impact-resistant UV resin applied as a thin coating layer for parts that need flexibility and toughness on the surface rather than a hard shell. Ideal for snap-fit covers, lids, and parts that flex slightly in use.\u003c\/p\u003e\n      \u003ca href=\"https:\/\/siraya.tech\/collections\/flexible-resin-tenacious-family\" class=\"st-btn\"\u003eShop Tenacious\u003c\/a\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003chr class=\"st-divider\"\u003e\n\n  \u003c!-- SECTION 4: STEP BY STEP --\u003e\n  \u003ch2\u003eHow to Apply PETG Coating: Step-by-Step\u003c\/h2\u003e\n  \u003cp\u003eApplying a coating resin to a PETG print is straightforward and does not require specialized equipment beyond a UV lamp or access to direct sunlight.\u003c\/p\u003e\n\n  \u003cdiv class=\"st-callout\"\u003e\n    \u003cp\u003e\u003cstrong\u003eWhat you need:\u003c\/strong\u003e Siraya Tech Build Coat or coating resin of choice · Disposable brush or foam applicator · UV lamp (365nm to 405nm) or direct sunlight · Nitrile gloves · Optional: 220-grit sandpaper for pre-sanding\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStep 1 — Clean the print:\u003c\/strong\u003e Remove any support material. Wipe the surface with isopropyl alcohol (IPA) to remove grease, dust, and release agents. Allow to dry fully before proceeding.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStep 2 — Optional pre-sand:\u003c\/strong\u003e For prints with heavy layer lines, a light pass with 220-grit sandpaper before coating gives the resin better adhesion and a smoother final result. This step is optional for standard-quality prints.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStep 3 — Apply the coating:\u003c\/strong\u003e Put on nitrile gloves. Apply a thin, even layer of coating resin using a brush or foam applicator. Work in one direction to minimize bubbles. For deep layer lines, a slightly thicker application is fine as the resin is self-leveling.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStep 4 — Pop bubbles:\u003c\/strong\u003e If bubbles appear, briefly pass a heat gun or lighter 10 to 15 cm above the surface for 1 to 2 seconds. Surface tension will pop the bubbles. Do not overheat the part.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStep 5 — Cure:\u003c\/strong\u003e Place the part under a UV lamp for 2 to 5 minutes, rotating to ensure full coverage. In direct sunlight, allow 5 to 10 minutes depending on UV intensity.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStep 6 — Inspect and repeat if needed:\u003c\/strong\u003e After the first cure, inspect the surface. If layer lines are still visible, apply a second thin coat and cure again. Most prints achieve a smooth finish in one to two coats.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStep 7 — Final cure:\u003c\/strong\u003e Give the part a final full cure of 5 minutes under UV to ensure the coating is fully hardened throughout.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"st-divider\"\u003e\n\n  \u003c!-- SECTION 5: COMPARISON TABLE --\u003e\n  \u003ch2\u003eCoating vs Sanding vs Priming: Which Finishing Method Is Best for PETG?\u003c\/h2\u003e\n  \u003cp\u003eEach post-processing method has trade-offs. Use this comparison to decide which approach fits your project:\u003c\/p\u003e\n\n  \u003ctable class=\"st-spec-table\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eMethod\u003c\/th\u003e\n        \u003cth\u003ePros\u003c\/th\u003e\n        \u003cth\u003eCons\u003c\/th\u003e\n        \u003cth\u003eBest For\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003e\u003cstrong\u003eSanding only\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd\u003eNo materials cost, no curing required\u003c\/td\u003e\n        \u003ctd\u003eTime-intensive, does not seal surface, difficult on complex geometry\u003c\/td\u003e\n        \u003ctd\u003eSimple flat surfaces, large prints with easy access\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003e\u003cstrong\u003ePrimer and paint\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd\u003eWide color options, hides layer lines reasonably well\u003c\/td\u003e\n        \u003ctd\u003eMultiple steps, long drying time, does not add structural strength\u003c\/td\u003e\n        \u003ctd\u003eDisplay models and cosplay props where color matters most\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003e\u003cstrong\u003eUV coating resin\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd\u003eFills layer lines in one step, seals surface, adds hardness, cures in minutes\u003c\/td\u003e\n        \u003ctd\u003eRequires UV lamp, adds slight weight, gloves and ventilation needed\u003c\/td\u003e\n        \u003ctd\u003eFunctional parts, outdoor parts, prototypes needing a fast professional finish\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003e\u003cstrong\u003eCombination approach\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd\u003eBest possible surface quality and paint adhesion\u003c\/td\u003e\n        \u003ctd\u003eMost steps involved, longest total time\u003c\/td\u003e\n        \u003ctd\u003eHigh-end display and presentation models\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003chr class=\"st-divider\"\u003e\n\n  \u003c!-- SECTION 6: COMPATIBILITY TABLE --\u003e\n  \u003ch2\u003eCompatibility: Which Siraya Tech Coatings Work on PETG?\u003c\/h2\u003e\n\n  \u003ctable class=\"st-compat-table\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eCoating Product\u003c\/th\u003e\n        \u003cth\u003eWorks on PETG\u003c\/th\u003e\n        \u003cth\u003eFinish Type\u003c\/th\u003e\n        \u003cth\u003eUV Cure Time\u003c\/th\u003e\n        \u003cth\u003eBest Application Method\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eBuild Coat\u003c\/td\u003e\n        \u003ctd\u003e\u003cspan class=\"st-yes\"\u003e✅ Yes\u003c\/span\u003e\u003c\/td\u003e\n        \u003ctd\u003eGloss\u003c\/td\u003e\n        \u003ctd\u003e2 to 5 minutes\u003c\/td\u003e\n        \u003ctd\u003eBrush or pour\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTenacious (coating use)\u003c\/td\u003e\n        \u003ctd\u003e\u003cspan class=\"st-yes\"\u003e✅ Yes\u003c\/span\u003e\u003c\/td\u003e\n        \u003ctd\u003eSemi-gloss\u003c\/td\u003e\n        \u003ctd\u003e3 to 5 minutes\u003c\/td\u003e\n        \u003ctd\u003eThin brush application\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eStandard UV Resins\u003c\/td\u003e\n        \u003ctd\u003e\u003cspan class=\"st-no\"\u003e❌ Not recommended\u003c\/span\u003e\u003c\/td\u003e\n        \u003ctd\u003eN\/A\u003c\/td\u003e\n        \u003ctd\u003eN\/A\u003c\/td\u003e\n        \u003ctd\u003eN\/A\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003chr class=\"st-divider\"\u003e\n\n  \u003c!-- SECTION 7: TIPS CALLOUT --\u003e\n  \u003ch2\u003eTips for Best Results When Coating PETG\u003c\/h2\u003e\n\n  \u003cdiv class=\"st-callout\"\u003e\n    \u003cp\u003e💡 \u003cstrong\u003ePro tip:\u003c\/strong\u003e Always clean with IPA before coating. PETG releases oils from handling that prevent resin adhesion. Even a brand-new print straight off the bed should be wiped down before any coating is applied.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eWork in a well-ventilated area. Uncured resin produces fumes. Wear nitrile gloves throughout the entire process.\u003c\/li\u003e\n    \u003cli\u003eAvoid applying coating in thick pools. Thick sections cure slower and may remain tacky underneath even when the surface appears cured.\u003c\/li\u003e\n    \u003cli\u003eRotate the part during UV curing to ensure all angles receive direct UV exposure, especially on complex geometry.\u003c\/li\u003e\n    \u003cli\u003eIf the cured surface feels tacky, it is under-cured. Return to the UV lamp for additional cure time in 1-minute increments.\u003c\/li\u003e\n    \u003cli\u003eFor painted finishes, allow the cured coating to fully harden for 30 minutes before applying primer or paint on top.\u003c\/li\u003e\n    \u003cli\u003eStore unused coating resin in a dark, cool location away from UV light sources to prevent premature curing in the bottle.\u003c\/li\u003e\n       \u003cli\u003eFor very complex geometry or recessed areas, thin the coating slightly by warming the bottle in warm water for 1 to 2 minutes before application. This improves flow into tight spaces without adding solvent.\u003c\/li\u003e\n    \u003cli\u003eIf applying over a painted PETG surface, ensure the paint is fully dry and cured before coating. Uncured paint trapped under resin can cause adhesion failure or discoloration.\u003c\/li\u003e\n    \u003cli\u003eFor matte finishes, apply a matte clear coat spray over the fully cured resin surface rather than trying to achieve matte directly from the coating resin.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"st-divider\"\u003e\n\n  \u003c!-- SECTION 8: WHY SIRAYA TECH --\u003e\n  \u003ch2\u003eWhy Siraya Tech for PETG Coating?\u003c\/h2\u003e\n  \u003cp\u003eSiraya Tech started as a professional UV resin manufacturer supplying dental, jewelry, and engineering applications before entering the consumer FDM market. That professional formulation background directly benefits every coating product:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast cure time:\u003c\/strong\u003e Coating resins cure in 2 to 5 minutes under a standard UV lamp, not the 30 to 60 minutes required by some air-dry coating products.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClear formulation:\u003c\/strong\u003e Build Coat cures water-clear, so it does not yellow or tint the underlying print color over time.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHard final surface:\u003c\/strong\u003e Cured coating hardness is significantly higher than raw PETG, adding scratch and abrasion resistance to the finished part.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCompatibility tested:\u003c\/strong\u003e Siraya Tech coatings are tested on PETG, PLA, ABS, ASA, and resin prints, so you can use the same product across your entire workflow.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTechnical documentation:\u003c\/strong\u003e Safety Data Sheets and Technical Data Sheets are publicly available for every product for compliance and safety review.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDirect support:\u003c\/strong\u003e Reach the Siraya Tech team by email at support@siraya.tech or through the support page for application guidance and troubleshooting.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"st-divider\"\u003e\n\n  \u003c!-- SECTION 9: RELATED COLLECTIONS --\u003e\n  \u003ch2\u003eExplore Related Collections\u003c\/h2\u003e\n\n  \u003cdiv class=\"st-related-links\"\u003e\n    \u003ca href=\"https:\/\/siraya.tech\/products\/build-coat\"\u003eBuild Coat UV Surface Coating\u003c\/a\u003e\n    \u003ca href=\"https:\/\/siraya.tech\/collections\/filament\"\u003eAll Filament\u003c\/a\u003e\n    \u003ca href=\"https:\/\/siraya.tech\/collections\/flexible-resin-tenacious-family\"\u003eTenacious Flexible Resin\u003c\/a\u003e\n    \u003ca href=\"https:\/\/siraya.tech\/collections\/engineering-resin\"\u003eEngineering Resins\u003c\/a\u003e\n    \u003ca href=\"https:\/\/siraya.tech\/collections\/accessories-for-3dprinter-and-resin-fdm-prints\"\u003eAccessories\u003c\/a\u003e\n    \u003ca href=\"https:\/\/siraya.tech\/pages\/print-settings-download\"\u003ePrint Settings Download\u003c\/a\u003e\n  \u003c\/div\u003e\n\n  \u003chr class=\"st-divider\"\u003e\n\n  \u003c!-- SECTION 10: RELATED ARTICLES --\u003e\n  \u003ch2\u003eRelated Articles\u003c\/h2\u003e\n\n  \u003cdiv class=\"st-related-links\"\u003e\n    \u003ca href=\"https:\/\/siraya.tech\/blogs\/news\/how-to-smooth-3d-prints\"\u003eHow to Smooth 3D Prints: Complete Finishing Guide\u003c\/a\u003e\n    \u003ca href=\"https:\/\/siraya.tech\/blogs\/news\/build-coat-guide\"\u003eBuild Coat Application Guide\u003c\/a\u003e\n    \u003ca href=\"https:\/\/siraya.tech\/blogs\/news\/petg-filament-guide\"\u003ePETG Filament: Tips, Settings, and Best Practices\u003c\/a\u003e\n    \u003ca href=\"https:\/\/siraya.tech\/pages\/print-settings-download\"\u003ePrint Settings Profiles Download\u003c\/a\u003e\n    \u003ca href=\"https:\/\/siraya.tech\/pages\/support\"\u003eUser Guide and Support\u003c\/a\u003e\n  \u003c\/div\u003e\n\n  \u003chr class=\"st-divider\"\u003e\n\n  \u003c!-- SECTION 11: FAQ --\u003e\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n  \u003cdiv class=\"st-faq\"\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan you coat PETG 3D prints with UV resin?\u003c\/summary\u003e\n      \u003cdiv class=\"st-faq-body\"\u003e\n        \u003cp\u003eYes. UV coating resin adheres well to PETG surfaces when the part is clean and free of grease. Clean with isopropyl alcohol first, apply a thin layer of coating resin, then cure under a UV lamp for 2 to 5 minutes. Siraya Tech Build Coat is specifically designed for this application and fills layer lines in one to two coats.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDoes coating resin stick to PETG?\u003c\/summary\u003e\n      \u003cdiv class=\"st-faq-body\"\u003e\n        \u003cp\u003eYes, with proper surface preparation. PETG has a slightly waxy surface from handling. Wipe thoroughly with isopropyl alcohol before applying any coating resin. If adhesion is still a concern, a very light scuff with 220-grit sandpaper before coating improves mechanical bonding significantly.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I remove layer lines from PETG prints?\u003c\/summary\u003e\n      \u003cdiv class=\"st-faq-body\"\u003e\n        \u003cp\u003eThe fastest method is applying a self-leveling UV coating resin such as Siraya Tech Build Coat. Apply one thin coat, allow it to self-level for 30 to 60 seconds, then cure under UV for 2 to 5 minutes. One to two coats eliminates most standard layer lines without any sanding. For very heavy layer lines, a light sand before coating gives the best result.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the best finish for PETG 3D prints?\u003c\/summary\u003e\n      \u003cdiv class=\"st-faq-body\"\u003e\n        \u003cp\u003eFor functional parts, a UV coating resin gives the best combination of speed, surface quality, and added durability in one step. For display or cosplay models where color is important, apply UV coating resin first to smooth the surface, then prime and paint over the cured coating. The cured resin provides an excellent base for paint adhesion.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDo I need a UV lamp to cure coating resin on PETG?\u003c\/summary\u003e\n      \u003cdiv class=\"st-faq-body\"\u003e\n        \u003cp\u003eA UV lamp is the fastest and most reliable method, typically curing in 2 to 5 minutes. Direct sunlight also works but requires longer exposure of 5 to 15 minutes depending on UV intensity and time of day. A dedicated UV lamp gives consistent results regardless of weather or season and is recommended for anyone coating parts regularly.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow many coats of resin do I need on a PETG print?\u003c\/summary\u003e\n      \u003cdiv class=\"st-faq-body\"\u003e\n        \u003cp\u003eMost standard-quality PETG prints achieve a smooth, layer-line-free surface in one to two coats of Siraya Tech Build Coat. Prints with heavier layer lines or coarser layer heights may benefit from a third coat. Always cure each coat fully before applying the next one.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs PETG coating food safe?\u003c\/summary\u003e\n      \u003cdiv class=\"st-faq-body\"\u003e\n        \u003cp\u003eFood safety depends on the specific resin formulation and the degree of cure achieved. Siraya Tech does not certify coating resins for direct food contact. For food-contact applications, consult the product's Safety Data Sheet and Technical Data Sheet, and consider alternative food-safe coatings or food-grade filaments for the base print. Fully cured resin is significantly safer than partially cured resin, but professional food-contact certification requires independent testing.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I paint over PETG coating resin?\u003c\/summary\u003e\n      \u003cdiv class=\"st-faq-body\"\u003e\n        \u003cp\u003eYes. Fully cured Siraya Tech coating resin provides an excellent surface for paint adhesion. Allow the cured coating to harden for at least 30 minutes after UV curing, then apply a standard acrylic primer followed by your paint of choice. The smooth, sealed resin surface holds paint better than raw PETG and gives a more even final color with fewer coats of paint required.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003chr class=\"st-divider\"\u003e\n\n  \u003c!-- CLOSING CALLOUT --\u003e\n  \u003cdiv class=\"st-callout\"\u003e\n    \u003cp\u003e💡 \u003cstrong\u003eNeed help choosing the right PETG coating product?\u003c\/strong\u003e Contact the Siraya Tech team at \u003ca href=\"mailto:support@siraya.tech\"\u003esupport@siraya.tech\u003c\/a\u003e or visit the \u003ca href=\"https:\/\/siraya.tech\/pages\/support\"\u003esupport page\u003c\/a\u003e for application guides, print settings, and troubleshooting resources.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","products":[{"product_id":"siraya-tech-aegis-coating-systerm-for-resin-filament-prints","title":"Siraya Tech Aegis - Surface Coating System","description":"\u003cp\u003e\u003ca rel=\"noopener\" title=\"Aegis coating system for resin and filament prints\" href=\"https:\/\/www.amazon.com\/dp\/B0FS1HKGGK?maas=maas_adg_9584C3948FB959F702A6C4D1BFD0F02D_afap_abs\u0026amp;ref_=aa_maas\u0026amp;tag=maas\u0026amp;th=1\" target=\"_blank\"\u003e\u003cstrong\u003eAvailable on Amazon too\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTwo Finishes: \u003c\/strong\u003eClear + Matte — use individually or together for custom results\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAegis Clear Seal Fibers \u0026amp; Protect Surfaces\u003c\/strong\u003e — Encapsulates CF\/GF prints, reduces irritation\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAegis Matte Hide Layer Lines\u003c\/strong\u003e — Matte diffuses light for a smooth, injection-mold-like look\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePremium Touch Feel\u003c\/strong\u003e — Soft-touch matte or glossy clear options\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEasy Application\u003c\/strong\u003e — Brush or dilute with water and spray; dries in 20–30 min\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMix for Satin Finish\u003c\/strong\u003e — 1:1 Clear+Matte creates a high-end semi-matte sheen\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWorks on All Common Filaments\u003c\/strong\u003e — PLA, ABS, PETG, TPU, PA, PPA, PET, CF, Resin Prints, ect.\u003c\/p\u003e","brand":"Siraya Tech","offers":[{"title":"US \/ 500g \/ Clear","offer_id":43684117446765,"sku":"ST4201","price":16.99,"currency_code":"USD","in_stock":true},{"title":"US \/ 500g \/ Matte","offer_id":43684117479533,"sku":"ST4202","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0255\/7539\/1341\/files\/aegiscoating-mainpic_9.png?v=1763606034"}],"url":"https:\/\/siraya.tech\/collections\/petg-coating.oembed","provider":"Siraya Tech","version":"1.0","type":"link"}