{"product_id":"sudbury-350-marine-penetrating-sealant","title":"Sudbury 350 Marine Penetrating Sealant","description":"\u003ch2\u003eSudbury 350 – Marine Penetrating Sealant\u003c\/h2\u003e\u003cp\u003eSudbury 350 is a low-viscosity marine penetrating sealant specifically formulated to flow into narrow seams, fine joints, and tight gaps that standard cartridge sealants cannot reach. It skins quickly, cures to a flexible, durable seal in 1–7 days, and shares the adhesive strength and elastomeric characteristics of the broader Sudbury marine sealant line. Paintable and wet-sandable after cure, with mineral spirits cleanup.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eLow viscosity — flows into narrow seams and fine joints\u003c\/li\u003e\n\u003cli\u003eFast skinning — skins in minutes\u003c\/li\u003e\n\u003cli\u003eFull cure: 1–7 days\u003c\/li\u003e\n\u003cli\u003eFlexible, elastomeric seal after cure\u003c\/li\u003e\n\u003cli\u003ePaintable and wet-sandable when fully cured\u003c\/li\u003e\n\u003cli\u003eAdheres to fibreglass, wood, metal, glass, and most plastics\u003c\/li\u003e\n\u003cli\u003eClean up with mineral spirits\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eWindshield and porthole sealing\u003c\/li\u003e\n\u003cli\u003eFine deck and cabin seams\u003c\/li\u003e\n\u003cli\u003eHatches and vents\u003c\/li\u003e\n\u003cli\u003eDeck hardware bedding on narrow or tight-fitting joints\u003c\/li\u003e\n\u003cli\u003eAny seam or joint too narrow for a standard cartridge sealant\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003eThe 350 is the right choice when the joint is too fine or tight for a standard cartridge sealant to fill properly — windshield frames, porthole surrounds, and fine cabin seams are the most common use cases. The low viscosity lets it wick into the joint rather than sitting on top. For larger sealing jobs or areas where a full cartridge is practical, the \u003ca href=\"\/products\/sudbury-300-marine-sealant-white-10-oz-cartridge\"\u003eSudbury 300 (White, 10 oz.)\u003c\/a\u003e, \u003ca href=\"\/products\/sudbury-302-sealant-10-oz-cartridge-black\"\u003eSudbury 302 (Black, 10 oz.)\u003c\/a\u003e, and \u003ca href=\"\/products\/sudbury-301-sealant-10-oz-cartridge-clear\"\u003eSudbury 301 (Clear, 10 oz.)\u003c\/a\u003e are the cartridge-format siblings. For tube-format jobs, see the \u003ca href=\"\/products\/sudbury-320-sealant-3-oz-tube-white\"\u003eSudbury 320 (White, 3 oz.)\u003c\/a\u003e, \u003ca href=\"\/products\/sudbury-322-sealant-3-oz-tube-black\"\u003eSudbury 322 (Black, 3 oz.)\u003c\/a\u003e, and \u003ca href=\"\/products\/sudbury-321x-sealant-3-oz-tube-clear\"\u003eSudbury 321X (Clear, 3 oz.)\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eRelated Products\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sudbury-300-marine-sealant-white-10-oz-cartridge\"\u003eSudbury 300 – White, 10 oz. Cartridge\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sudbury-302-sealant-10-oz-cartridge-black\"\u003eSudbury 302 – Black, 10 oz. Cartridge\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sudbury-301-sealant-10-oz-cartridge-clear\"\u003eSudbury 301 – Clear, 10 oz. Cartridge\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sudbury-320-sealant-3-oz-tube-white\"\u003eSudbury 320 – White, 3 oz. Tube\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sudbury-322-sealant-3-oz-tube-black\"\u003eSudbury 322 – Black, 3 oz. Tube\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sudbury-321x-sealant-3-oz-tube-clear\"\u003eSudbury 321X – Clear, 3 oz. Tube\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51250760613924,"sku":"829-350","price":25.44,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/829-350.jpg?v=1786509712","url":"https:\/\/marisolmarine.com\/products\/sudbury-350-marine-penetrating-sealant","provider":"Marisol Marine Company","version":"1.0","type":"link"}