{"product_id":"west-system-407-low-density-filler","title":"West System 407 Low-Density Filler","description":"\u003cp\u003eWest System's 407 Low-Density Filler is the fairing filler of the West range: a microballoon blend that mixes into 105 epoxy to make an easy-sanding, low-density fairing putty. It cures to a dark red-brown, shapes cleanly with a fairing board, and holds enough strength for faired surfaces above or below the waterline once sealed.\u003c\/p\u003e\n\u003c!--bs-body-v1--\u003e\n\u003ch3\u003e407 or 410?\u003c\/h3\u003e\n\u003cp\u003eBoth sand easily. \u003ca href=\"\/products\/west-system-410-microlight\"\u003e410 Microlight\u003c\/a\u003e is lighter and the easiest sanding of the two, but West limits it to areas out of the water and away from high load. 407 gives up a little sanding speed for real strength, which makes it the pick for hull-side fairing, below-waterline work, and anywhere the faired surface takes abuse.\u003c\/p\u003e\n\u003ch3\u003eMixing it\u003c\/h3\u003e\n\u003cp\u003eWet out the surface with mixed epoxy first, then thicken the batch with 407 to a peanut-butter consistency for fairing or a bit looser for skim coats. Spread, let it cure, and knock it down with 80 grit before finishing. Our \u003ca href=\"\/pages\/fairing-filler-calculator\"\u003efairing filler calculator\u003c\/a\u003e sizes the batch for you.\u003c\/p\u003e\n\u003ch3\u003eThe house-brand route\u003c\/h3\u003e\n\u003cp\u003eOur \u003ca href=\"\/products\/phenolic-microballoons\"\u003ePhenolic Microballoons\u003c\/a\u003e are the same class of filler at a fraction of the price per quart, and our pre-blended \u003ca href=\"\/products\/sm-fairing-compound\"\u003eFairing Compound\u003c\/a\u003e adds the anti-sag silica for you. The Compare section below puts them side by side.\u003c\/p\u003e","brand":"West System","offers":[{"title":"4 oz","offer_id":52408632836398,"sku":"SWES-407-5","price":40.1,"currency_code":"USD","in_stock":true},{"title":"12 oz","offer_id":52408632869166,"sku":"SWES-407-15","price":85.5,"currency_code":"USD","in_stock":true},{"title":"14 lb Bag","offer_id":52408632901934,"sku":"SWES-407-B","price":839.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0840\/4071\/2494\/files\/west-system-407-low-density-fairing-filler.png?v=1786218761","url":"https:\/\/boatsuppliers.com\/products\/west-system-407-low-density-filler","provider":"Boat Suppliers","version":"1.0","type":"link"}