{"product_id":"non-toxic-high-temp-mill-pac-black-sealant-1050f-durable-seal","title":"Non-Toxic High Temp Mill-Pac Black Sealant - 1050F Durable Seal","description":"\u003cp\u003eIn this review of the Non-Toxic High Temp Mill-Pac Black Sealant the bottom line is clear: this is a straightforward, environmentally friendly high-temperature sealant best suited for people sealing fireplaces, direct vent systems, flue joints and stoves who want a durable, non-shrinking joint compound. The reviewer found the single biggest reason to buy is the product's non-toxic formulation combined with a high temperature rating up to \u003cstrong\u003e1050F resistance\u003c\/strong\u003e, which gives confidence that the seal will last through repeated heating cycles without cracking or shrinking.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh temperature rating:\u003c\/strong\u003e Rated to 1050F (565C), it holds up under the heat of fireplaces and wood, pellet or gas stoves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-toxic formulation:\u003c\/strong\u003e Made without RCF refractory fibers and marketed as environmentally friendly so installers avoid many OSHA and EPA concerns.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable seal:\u003c\/strong\u003e The compound is designed not to crack or shrink, providing long-term sealing of flue joints and boxes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile use:\u003c\/strong\u003e Suitable for direct vent systems, flue joints and multiple stove types, making it useful for a range of heating equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCartridge format:\u003c\/strong\u003e Supplied in a 10.3 oz cartridge for caulk-gun application so it is compatible with standard sealant tools.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis sealant is aimed at homeowners, installers and service technicians who need a reliable, long-lasting seal for fireplaces, wood, pellet and gas stoves, and direct vent systems. If you prioritize an environmentally friendly, non-toxic option and need something rated for high heat, this product fits those requirements.\u003c\/p\u003e\n\u003cp\u003eThose who expect detailed step-by-step instructions in the package or need an easy, foolproof application may want to be prepared: customer feedback on instructions and ease of application is mixed, so inexperienced users should plan on reading product guidance or watching an application demonstration first.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNon-toxic, environmentally friendly formula reduces concerns about hazardous fibers during use.\u003c\/li\u003e\n\u003cli\u003eHigh 1050F rating makes it suitable for intense heat environments like fireplaces and stoves.\u003c\/li\u003e\n\u003cli\u003eFormulation resists cracking and shrinking for a durable, long-lasting seal.\u003c\/li\u003e\n\u003cli\u003eGood overall product quality reported by multiple users who achieved solid seals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eApplication experience varies; some users find it harder to apply cleanly from the cartridge than others.\u003c\/li\u003e\n\u003cli\u003eSome reports of smoky or strong odor during curing suggest ventilation and proper curing time are important.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eIGS Industries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature rating\u003c\/td\u003e\n\u003ctd\u003e1050F (565C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e10.3 oz cartridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuitable for\u003c\/td\u003e\n\u003ctd\u003eFireplaces, direct vent systems, flue joints, wood, pellet and gas stoves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFibers\u003c\/td\u003e\n\u003ctd\u003eNon-RCF refractory fibers (non-toxic formulation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironmental notes\u003c\/td\u003e\n\u003ctd\u003eAdvertised as environmentally friendly with reduced OSHA and EPA concerns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Mill-Pac Black 1050F sealant is a sensible choice for anyone needing a high-temperature, non-toxic seal for flues and stoves; its durability and non-shrinking formula make it good value for a long-lasting repair. Installers and homeowners who are comfortable with cartridge application and allow for proper curing will find it dependable, though novices should be aware that application can require care to avoid mess and odor during curing.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this safe for indoor use near living spaces?\u003c\/strong\u003e\u003cbr\u003eIt is formulated as non-toxic and uses non-RCF fibers, but proper ventilation during application and curing is recommended to minimize any odor or smoke.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat heating equipment is it appropriate for?\u003c\/strong\u003e\u003cbr\u003eIt is suitable for fireplaces, direct vent systems, flue joints and wood, pellet and gas stoves up to 1050F.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is the product applied?\u003c\/strong\u003e\u003cbr\u003eThe sealant comes in a 10.3 oz cartridge for use with a standard caulk gun; practice and careful application help reduce mess and ensure a clean seal.\u003c\/p\u003e","brand":"IGS Industries","offers":[{"title":"Default Title","offer_id":48612710023387,"sku":"B01L2VWIWI","price":32.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51KsybyFkpL._SL1000.jpg?v=1778407893","url":"https:\/\/gearmusthave.com\/products\/non-toxic-high-temp-mill-pac-black-sealant-1050f-durable-seal","provider":"GearMustHave","version":"1.0","type":"link"}