{"product_id":"west-system-c105b-epoxy-resin-3-74l-98gal","title":"West System C105B Epoxy Resin – 3.74 L (.98 Gal)","description":"\u003ch2\u003eWest System C105B Epoxy Resin – 3.74 L (.98 Gal)\u003c\/h2\u003e\u003cp\u003eThe same clear, light amber, low-viscosity epoxy resin as the C105A — in a larger near-gallon format suited for extended projects, production builds, and multi-stage repairs. C105B delivers deep penetration into wood fiber and fiberglass laminates, self-levels under roller application, and cures across a wide temperature range to a hard, sandable finish.\u003c\/p\u003e\u003cp\u003eMust be paired with a compatible West System hardener. Ratio and working time are determined by hardener selection.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eLow viscosity (~1000 cP at 70°F \/ 21°C) for thorough penetration into wood and fiberglass substrates\u003c\/li\u003e\n\u003cli\u003eSelf-leveling — ideal for roller application on horizontal surfaces and large flat panels\u003c\/li\u003e\n\u003cli\u003eCures across a wide temperature range for flexible use in varying conditions\u003c\/li\u003e\n\u003cli\u003eSands, shapes, and paints cleanly after full cure\u003c\/li\u003e\n\u003cli\u003eExcellent adhesive base when combined with thickening fillers to control sag on vertical surfaces\u003c\/li\u003e\n\u003cli\u003eRelatively high flash point for safer handling in enclosed spaces\u003c\/li\u003e\n\u003cli\u003e3.74 L size reduces per-unit cost for larger jobs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Hardeners\u003c\/h3\u003e\u003cp\u003eSelect a hardener based on your working time requirements and ambient temperature:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/west-system-c205-hardener-814-ml-27-5-oz\"\u003eWest System C205 Hardener – 814 ml\u003c\/a\u003e — Standard cure, all-season versatility\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/west-system-c205-hardener-208-ml-7-oz\"\u003eWest System C205 Hardener – 208 ml\u003c\/a\u003e — Compact size for smaller mixed batches\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/west-system-c209sb-extra-slow-hardener-1-24-l-42-2oz\"\u003eWest System C209SB Extra Slow Hardener – 1.24 L\u003c\/a\u003e — Extended pot life for large pours or warm-weather work\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/west-system-c207sa-special-clear-hardener-315-ml-10-6-oz\"\u003eWest System C207SA Special Clear Hardener – 315 ml\u003c\/a\u003e — For clear-coat and bright-finish applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRelated Products\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/west-system-c105a-epoxy-resin-946-ml-32-oz\"\u003eWest System C105A Epoxy Resin – 946 ml\u003c\/a\u003e — Smaller format for targeted repairs and smaller jobs\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/west-system-733w-9-oz-fiberglass-reinforcing-tape-6-x-10-2-pack\"\u003eWest System 733W Fiberglass Reinforcing Tape – 6\" x 10' (2-Pack)\u003c\/a\u003e — Structural tape for seams and corners\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/west-system-biaxial-e-glass-fabric-17oz-50in-x-20yd\"\u003eWest System Biaxial E-Glass Fabric – 17 oz., 50\" x 20 yd.\u003c\/a\u003e — High-performance laminating fabric for structural builds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eBest Use Cases:\u003c\/strong\u003e The C105B is the practical choice when a job requires more resin than a single 946 ml unit can provide — hull encapsulation, multi-layer lamination schedules, large fairing jobs, or any project where mixing multiple small units would create ratio inconsistency risk. It’s well-suited for boatyard professionals and serious DIY builders working on full hull repairs, deck replacements, or new plywood\/strip-planked builds where consistent resin supply across sessions matters.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Store partially used containers with the lid sealed tightly and use a pump dispenser for accurate metering. Incorrect mix ratios are the leading cause of soft or tacky cures — always measure by volume or weight. For high-volume production work, consider the \u003ca href=\"\/products\/west-system-c105c-resin-16-46-l-4-35-gal\"\u003eWest System C105C Resin – 16.46 L\u003c\/a\u003e for even greater economy per litre.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51233004126244,"sku":"655-C105B","price":178.09,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/655-105B_84b8e9d5-7971-4906-ab34-30f48c1b913d.jpg?v=1786152020","url":"https:\/\/marisolmarine.com\/products\/west-system-c105b-epoxy-resin-3-74l-98gal","provider":"Marisol Marine Company","version":"1.0","type":"link"}