{"product_id":"sem-sand-free-adhesion-promoter-for-plastics-11-6-oz-wet-on-wet-primer-activator-reduces-sanding","title":"SEM Sand Free adhesion promoter for plastics 11.6 oz — wet-on-wet primer activator, reduces sanding","description":"\u003cp\u003e\u003cstrong\u003eSEM 38363 Sand Free is a wet-on-wet adhesion promoter formulated to soften specific plastic substrates so coatings bond without aggressive sanding.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen working with plastic bumpers, trim pieces, and other automotive plastics that resist standard sanding and priming, getting a durable topcoat starts with a primer that actually sticks. SEM's Sand Free is designed to condition and soften certain hard-to-prepare plastics so subsequent primers and paints adhere more reliably. It’s supplied in an 11.6 oz container sized for workshop use and spot repairs.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Sand Free help when plastics won’t sand properly?\u003c\/h3\u003e\n\u003cp\u003eSand Free contains chemistry that lightly softens targeted plastic surfaces, creating a surface more receptive to wet-on-wet primers without heavy abrasion. This avoids the need for aggressive sanding that can damage thin or intricate parts. It’s intended for use where mechanical sanding is impractical or risks altering the part geometry.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSoftens surface polymers to improve mechanical grip of primers\u003c\/li\u003e\n  \u003cli\u003eEnables wet-on-wet application for faster workflow\u003c\/li\u003e\n  \u003cli\u003eReduces reliance on heavy sanding or plastic-specific primers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich plastic parts are suitable for SEM Sand Free?\u003c\/h3\u003e\n\u003cp\u003eSand Free is meant for certain hard-to-sand plastics commonly found in automotive exterior trim and bumpers. It’s important to test on a small area first because not all plastic formulations react the same way. Use it where compatibility is confirmed and avoid materials explicitly excluded by SEM technical data.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIdeal for many bumper and trim polymers that resist sanding\u003c\/li\u003e\n  \u003cli\u003eAppropriate for spot repairs and partial panel refinishing\u003c\/li\u003e\n  \u003cli\u003eNot a universal solution — perform compatibility checks first\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I apply Sand Free for best results?\u003c\/h3\u003e\n\u003cp\u003eApply Sand Free as part of a wet-on-wet process following SEM application instructions and safety guidelines. After treating the substrate, allow the product to act briefly according to product directions, then apply the recommended primer or sealer while the surface remains receptive. Avoid over-application and ensure proper ventilation and protective equipment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFollow SEM’s timing and recoat window for wet-on-wet systems\u003c\/li\u003e\n  \u003cli\u003eUse appropriate PPE and work in a ventilated area\u003c\/li\u003e\n  \u003cli\u003eTest and confirm adhesion before proceeding to full refinishing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? SEM 38363 Sand Free is aimed at automotive refinish professionals, collision repair shops, and experienced DIYers who encounter plastic parts that are difficult to abrade and prime. If you need a targeted adhesion promoter to simplify refinishing of plastics and reduce sanding time while maintaining reliable paint adhesion, Sand Free offers a practical option when used according to product guidelines.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use Sand Free on all plastic types?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — Sand Free works on certain hard-to-sand plastics. Always test a small area first and consult SEM compatibility guidance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need to sand after using Sand Free?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Usually heavy sanding isn’t required; it’s designed for wet-on-wet application. Follow SEM’s application instructions for best adhesion.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"SEM","offers":[{"title":"Default Title","offer_id":48084764786846,"sku":"B00B3HXM6I","price":39.7,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/sem-sand-free-front-can.jpg?v=1785862336","url":"https:\/\/northtrailauto.ca\/products\/sem-sand-free-adhesion-promoter-for-plastics-11-6-oz-wet-on-wet-primer-activator-reduces-sanding","provider":"North Trail Auto","version":"1.0","type":"link"}