{"product_id":"3m-marine-adhesive-sealant-5200-black-3-oz-tube-permanent-watertight-polyurethane-sealant","title":"3M Marine Adhesive Sealant 5200 — Black 3 oz Tube, Permanent Watertight Polyurethane Sealant","description":"\u003cstrong\u003e3M Marine Adhesive Sealant 5200 in black is a permanent, polyurethane-based sealant formulated to create watertight, high-strength bonds on wood, fiberglass and metal in marine environments.\u003c\/strong\u003e\n\n\u003cp\u003eBuilt for boats and marine repairs that demand durability, 3M 5200 combines exceptional adhesion with elastomeric flexibility so joints withstand vibration, swelling, shrinking and shock. This 3 oz tube size is convenient for small jobs and touch-ups where a permanent, below- or above-waterline seal is required. The black color blends with many hulls and fittings while resisting saltwater and weathering.\u003c\/p\u003e\n\n\u003ch3\u003eHow does 3M 5200 perform on common boat materials?\u003c\/h3\u003e\n\u003cp\u003e3M 5200 bonds to fiberglass, gelcoat, wood and many metals to form a structural, long-term joint. Its polyurethane chemistry cures to a tough, elastomeric material that grips porous and non-porous substrates for lasting adhesion without becoming brittle.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBonds fiberglass deck to hull and hull seams above or below the waterline.\u003c\/li\u003e\n  \u003cli\u003eSecures through-hull fittings, portholes and under moldings to resist leaks.\u003c\/li\u003e\n  \u003cli\u003eWorks for wood-to-fiberglass joints and motors mounted on fiberglass transoms.\u003c\/li\u003e\n  \u003cli\u003eMaintains flexibility to absorb movement from vibration or thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the working properties and cure expectations?\u003c\/h3\u003e\n\u003cp\u003eThis sealant offers a relatively long open working time to allow positioning and tooling before skin formation. Handling strength develops in about 48 hours depending on temperature and humidity; full cure can take several days for thicker beads.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLong work time for accurate placement and tooling.\u003c\/li\u003e\n  \u003cli\u003eForms a skin, then reaches handling strength in roughly 48 hours.\u003c\/li\u003e\n  \u003cli\u003eCures by reaction with moisture—warmer, humid conditions accelerate cure.\u003c\/li\u003e\n  \u003cli\u003eRecommended for cartridge or sausage pack dispensing with manual or pneumatic applicators.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs 3M 5200 suitable for underwater and weather-exposed joints?\u003c\/h3\u003e\n\u003cp\u003eFormulated to resist saltwater and harsh weather, 3M 5200 is widely used in marine repair and fabrication where exposure to water and UV is expected. While it creates permanent bonds, note that removal can require mechanical or chemical methods due to its toughness.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for durability in saltwater and outdoor marine conditions.\u003c\/li\u003e\n  \u003cli\u003eEffective both above and below the waterline for structural sealing.\u003c\/li\u003e\n  \u003cli\u003ePermanence is an advantage for long-term repairs; removal may be difficult.\u003c\/li\u003e\n  \u003cli\u003eIdeal for applications where a lasting, watertight bond is essential.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: 3M Marine Adhesive Sealant 5200 (3 oz tube, black) suits boat owners, professional riggers and marine repair technicians who need a permanent, resilient sealant for small-scale installations and touch-ups. If you require a high-strength, weather-resistant bond for hull fittings, portholes, motors on transoms or wood-fiberglass joints, this compact tube delivers 3M-grade adhesion and flexibility without the bulk of larger cartridges. For projects needing removable or short-term seals, consider a less permanent alternative—choose 3M 5200 when the goal is a durable, long-term marine seal.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePowerful marine sealant providing permanent bonding to wood, fiberglass and metal.\u003c\/li\u003e\n  \u003cli\u003eVersatile polyurethane polymer ideal for deck housings, hull fittings and transoms.\u003c\/li\u003e\n  \u003cli\u003eResists saltwater and weathering above and below the waterline.\u003c\/li\u003e\n  \u003cli\u003eElastomeric bond absorbs vibrations, swelling, shrinking and shock.\u003c\/li\u003e\n  \u003cli\u003eLong working time with handling strength in about 48 hours; suitable for manual or pneumatic applicators.\u003c\/li\u003e\n\u003c\/ul\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 3M 5200 be used below the waterline?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. 3M 5200 is formulated for permanent, watertight bonds and is suitable for use both above and below the waterline.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long until 3M 5200 is strong enough to handle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Handling strength typically forms in about 48 hours; full cure takes longer and depends on bead thickness, temperature and humidity.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"3M","offers":[{"title":"Default Title","offer_id":67590744735929,"sku":"B000Y89JC8","price":68.14,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/3m-5200-front-tube.jpg?v=1790537391","url":"https:\/\/redleafauto.ca\/products\/3m-marine-adhesive-sealant-5200-black-3-oz-tube-permanent-watertight-polyurethane-sealant","provider":"Redleaf Auto","version":"1.0","type":"link"}