{"product_id":"smooth-on-xtc-3d-20-mold-making-3d-print-coating-clear-finish","title":"Smooth-On XTC-3D 20 Mold Making \u0026 3D Print Coating - Clear Finish","description":"\u003cp\u003eIn this review the Smooth-On XTC-3D 20 is evaluated as a dedicated clear top coat for smoothing and finishing 3D printed parts. The bottom line: it is best for hobbyists and small shops who need a fast-curing, self-leveling epoxy that hides layer lines and leaves a hard, glossy surface. The reviewer found the 2A:1B by volume mix and roughly 10 minute working time straightforward for small parts, and the cured 80D Shore hardness gives a noticeably impact-resistant finish that reduces post-processing for many rigid prints.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-performance 3D print coating:\u003c\/strong\u003e Delivers a clear, glossy surface that smooths layer lines on SLA, SLS and fused filament parts for a cleaner final look.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide material compatibility:\u003c\/strong\u003e Works on PLA, ABS, Laywoo and powder printed parts so a range of rigid media can be finished with one product.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePractical mix ratio and cure:\u003c\/strong\u003e The 2A:1B by volume mixture and 10 minute working time suit small to medium projects and cures to a hard coating in approximately 3.5 hours.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-leveling epoxy:\u003c\/strong\u003e Wets out uniformly and minimizes brush stroke marks, which simplifies finishing for users without spray equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable finish:\u003c\/strong\u003e Cures to about 80D Shore hardness, producing an impact-resistant top coat for parts that see handling or light use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe XTC-3D 20 is aimed at makers, prop builders and product prototypers who need a reliable clear top coat to conceal print artifacts and provide a glossy, tough surface. It suits those finishing SLA and SLS parts as well as common filament materials like PLA and ABS.\u003c\/p\u003e\u003cp\u003eIt is less suited to large-volume industrial production where long pot life or automated dispensing is required, and anyone working with flexible or highly heat-sensitive substrates should perform a small-scale test first to ensure compatibility.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eProvides a smooth, glossy finish that noticeably reduces visible layer lines on rigid prints.\u003c\/li\u003e\n\u003cli\u003eSelf-leveling formulation covers evenly and often removes the need for heavy sanding between coats.\u003c\/li\u003e\n\u003cli\u003eReasonable working and cure times for quick turnaround on small projects.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eShort working time can be challenging on larger pieces or for less experienced users.\u003c\/li\u003e\n\u003cli\u003eSome users report stickiness or compatibility issues on certain surfaces, so test pieces are recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eSmooth-On XTC-3D 20 24 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended use\u003c\/td\u003e\n\u003ctd\u003e3D print smoothing and finishing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible materials\u003c\/td\u003e\n\u003ctd\u003eSLA, SLS, PLA, ABS, Laywoo, powder printed parts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMix ratio\u003c\/td\u003e\n\u003ctd\u003e2A:1B by volume\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking time\u003c\/td\u003e\n\u003ctd\u003eApproximately 10 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCure time\u003c\/td\u003e\n\u003ctd\u003eAbout 3.5 hours to handle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardness\u003c\/td\u003e\n\u003ctd\u003eApproximately 80D Shore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Smooth-On XTC-3D 20 is a practical, value-oriented clear coating for anyone finishing rigid 3D prints who needs a glossy, impact-resistant surface quickly. It is especially useful for hobbyists and small shops that want to cut sanding time and produce a professional-looking finish, provided users respect the short working time and test for stickiness on unfamiliar substrates.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan this be used on PLA and ABS?\u003c\/strong\u003e\u003cbr\u003eYes, the formula is intended for PLA and ABS as well as SLA and SLS parts, but perform a small-scale test to confirm adhesion and cure behavior.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long does it take to cure?\u003c\/strong\u003e\u003cbr\u003eThe product has about a 10 minute working time and typically cures to a hard coating in roughly 3.5 hours.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it leave brush marks?\u003c\/strong\u003e\u003cbr\u003eThe epoxy is self-leveling and designed to wet out uniformly to minimize brush strokes, though careful application helps on visible surfaces.\u003c\/p\u003e","brand":"Smooth-On, Inc.","offers":[{"title":"Default Title","offer_id":48191243157723,"sku":"B00PFXK4JY","price":35.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71Ys2z2qEZL._SL1024.jpg?v=1769490828","url":"https:\/\/gearmusthave.com\/products\/smooth-on-xtc-3d-20-mold-making-3d-print-coating-clear-finish","provider":"GearMustHave","version":"1.0","type":"link"}