{"product_id":"west-system-407-low-density-filler-14-lb","title":"West System 407 Low Density Filler – 14 lb","description":"\u003ch2\u003eLightweight Epoxy Fairing Compound for Hull \u0026amp; Deck Work\u003c\/h2\u003e\u003cp\u003eThe 407 Low Density Filler is a microballoon-based blending additive designed to be mixed with epoxy resin and hardener to create lightweight, easily workable fairing putties. Its low density makes it ideal for applications where weight savings matter and where the cured surface will be shaped, carved, or sanded to a smooth finish. Cures to a distinctive dark red\/brown colour, making it easy to identify coverage during fairing work.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMicroballoon-based formula creates a lightweight, low-density fairing compound\u003c\/li\u003e\n\u003cli\u003eEasy to sand and carve once cured — ideal for achieving smooth, fair hull surfaces\u003c\/li\u003e\n\u003cli\u003eGood strength-to-weight ratio for a filled epoxy system\u003c\/li\u003e\n\u003cli\u003eCures to a dark red\/brown colour for easy visual reference during fairing\u003c\/li\u003e\n\u003cli\u003eMix with epoxy resin and hardener to achieve desired consistency\u003c\/li\u003e\n\u003cli\u003e14 lb bulk size for larger fairing and repair projects\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFairing boat hulls, decks, and keels prior to painting\u003c\/li\u003e\n\u003cli\u003eFilling low spots, voids, and surface imperfections in fiberglass and wood substrates\u003c\/li\u003e\n\u003cli\u003eBuilding up lightweight fairing layers on composite structures\u003c\/li\u003e\n\u003cli\u003eShaping and profiling repairs where the cured material will be sanded flush\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRecommended Pairings\u003c\/h3\u003e\u003cp\u003eMix with \u003ca href=\"\/products\/west-system-c105a-epoxy-resin-946-ml-32-oz\"\u003eWest System C105A Epoxy Resin\u003c\/a\u003e and a compatible hardener. For large fairing areas in warm conditions, pair with the \u003ca href=\"\/products\/west-system-c209sb-extra-slow-hardener-1-24-l-42-2oz\"\u003eWest System C209SB Extra Slow Hardener\u003c\/a\u003e for extended working time. For structural bonding or filleting (not fairing), see \u003ca href=\"\/products\/west-system-406-colloidal-silica-filler-10-lb\"\u003eWest System 406 Colloidal Silica Filler\u003c\/a\u003e instead.\u003c\/p\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eBest Use Case:\u003c\/strong\u003e The 407 is the go-to filler for hull fairing work — particularly on sailboat keels, powerboat hulls, and any large surface area that needs to be built up and sanded fair before a topcoat. Its low density means less weight added to the structure, and it sands cleanly without loading up sandpaper the way denser fillers can. For customers doing structural repairs or bonding rather than fairing, steer them toward \u003ca href=\"\/products\/west-system-406-colloidal-silica-filler-10-lb\"\u003eWest System 406 Colloidal Silica Filler\u003c\/a\u003e or a flexible adhesive system like the \u003ca href=\"\/products\/west-system-g-flex-655-epoxy-flexible-toughened-adhesive-8-oz\"\u003eWest System G\/Flex 655 Epoxy\u003c\/a\u003e — 407 is optimized for fairing, not structural bonding. The 14 lb size is best suited for professional yards, boatbuilders, or owners undertaking full hull refairing projects.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51233005666340,"sku":"655-407B","price":1137.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/655-4075.jpg?v=1786152041","url":"https:\/\/marisolmarine.com\/products\/west-system-407-low-density-filler-14-lb","provider":"Marisol Marine Company","version":"1.0","type":"link"}