{"product_id":"3m-marine-grade-silicone-sealant-pn08017-white-3-oz-tube-high-temperature-non-yellowing-seal","title":"3M Marine Grade Silicone Sealant PN08017 — White 3 oz Tube, High-Temperature Non-Yellowing Seal","description":"\u003cp\u003e\u003cstrong\u003e3M Marine Grade Silicone Sealant PN08017 is a high-temperature, moisture-curing white silicone designed to create durable, non-yellowing seals above the waterline on boats and marine equipment.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBuilt to withstand the demanding conditions of marine environments, this 3 oz tube of 3M silicone offers a flexible, weather-resistant bond for interior and exterior above-water applications. It adheres to a wide range of substrates — including bare and painted metal, fiberglass, glass, non-oily woods, many plastics, and abraded rubber — and is formulated to resist sagging and discoloration over time. Intended for industrial and occupational use, the product provides a clean white finish that blends with common marine surfaces while curing through atmospheric moisture.\u003c\/p\u003e\n\n\u003ch3\u003eWhat surfaces will this silicone stick to reliably?\u003c\/h3\u003e\n\u003cp\u003eThis sealant bonds to many materials commonly found on boats and marine fixtures when surfaces are cleaned and prepared correctly. It is not formulated for continuously submerged joints.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBare and painted metals — use on aluminum and steel with proper surface prep.\u003c\/li\u003e\n  \u003cli\u003eFiberglass and glass — ideal for sealing windows, vents, and skin fittings.\u003c\/li\u003e\n  \u003cli\u003eNon-oily woods — good for trim and cabin joinery above the waterline.\u003c\/li\u003e\n  \u003cli\u003eMany plastics and abraded rubber — performs on suitably prepared substrates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does it perform in sun, heat, and marine weather?\u003c\/h3\u003e\n\u003cp\u003eThe formula is high-temperature rated and engineered to resist yellowing, maintaining appearance and flexibility when exposed to sun and fluctuating temperatures. It cures by moisture, so it develops a resilient skin and bond as it dries.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-temperature formulation reduces softening in heat-exposed areas.\u003c\/li\u003e\n  \u003cli\u003eNon-yellowing chemistry preserves white finish over time.\u003c\/li\u003e\n  \u003cli\u003eNon-sag formula allows neat vertical and overhead application.\u003c\/li\u003e\n  \u003cli\u003eMoisture-curing creates an elastic, weatherproof seal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I apply and prepare surfaces for best results?\u003c\/h3\u003e\n\u003cp\u003eClean, dry, and degrease substrates before applying; roughen smooth plastics or rubber for better mechanical adhesion. Cut the nozzle to the desired bead size, apply with steady pressure, tooling the bead within the product's skin time for a smooth finish.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRemove dirt, grease, and salt; use appropriate cleaners or solvents.\u003c\/li\u003e\n  \u003cli\u003eAbrade or scuff slick plastics and rubber to improve grip.\u003c\/li\u003e\n  \u003cli\u003eUse masking tape for clean edges; tool the joint to ensure contact.\u003c\/li\u003e\n  \u003cli\u003eAllow full moisture cure per conditions — humidity and temperature affect cure speed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there limitations or safety notes I should know?\u003c\/h3\u003e\n\u003cp\u003eThis product is intended for above-the-waterline marine use and for industrial\/occupational applications. It is not recommended for permanently submerged joints or for bonding oily woods and certain untreated plastics without testing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNot formulated for continuous underwater immersion — use marine polysulfide or polyurethane for submerged joints.\u003c\/li\u003e\n  \u003cli\u003eTest on unfamiliar plastics for compatibility before full application.\u003c\/li\u003e\n  \u003cli\u003eFollow workplace safety and ventilation guidelines during use.\u003c\/li\u003e\n  \u003cli\u003eKeep out of reach of children; dispose of empty tubes per local regulations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? 3M Marine Grade Silicone Sealant PN08017 is aimed at marine professionals, boatyards, and hobbyists performing above-waterline repairs, installations, or finish work who need a reliable, non-yellowing white silicone that tolerates heat and outdoor exposure. If you require an industrial-grade, moisture-curing sealant for cabins, hatches, windows, vents, and trim where a neat, flexible seal is essential, this 3 oz tube delivers a compact, job-site friendly option.\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: Is this sealant suitable for underwater use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This 3M silicone is formulated for above-the-waterline applications, not for permanent underwater joints.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long does it take to cure?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Cure speed varies with humidity and temperature; it skins quickly but may take days to fully cure in cool, dry conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"3M","offers":[{"title":"Default Title","offer_id":67593840787641,"sku":"B000R4UB08","price":58.77,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/3m-marine-sealant-tube-front.jpg?v=1790579658","url":"https:\/\/redleafauto.ca\/products\/3m-marine-grade-silicone-sealant-pn08017-white-3-oz-tube-high-temperature-non-yellowing-seal","provider":"Redleaf Auto","version":"1.0","type":"link"}