{"product_id":"3m-urethane-seam-sealer-08367-black-high-solids-flexible-pack","title":"3M Urethane Seam Sealer 08367 Black - High Solids, Flexible (Pack","description":"\u003cp\u003eIn this review of the 3M Urethane Seam Sealer 08367, the bottom line is simple: this is a workhorse seam sealer for automotive and general paint prep where a permanently flexible, non-shrinking seal is required. It is aimed at technicians, body shops and experienced DIYers who need a thick, high-solids urethane that adheres to bare metal, primed metal and painted surfaces and cures by moisture for reliable performance in hot or humid conditions. The single biggest reason to buy is its combination of flexibility and durability that resists cracking under vibration and moisture.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle component formula:\u003c\/strong\u003e Provides easy application with a standard caulking gun and bonds well to bare metal, primed metal and painted surfaces without mixing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture curing property:\u003c\/strong\u003e Cures reliably in high heat and humidity environments so it performs consistently in shop conditions where moisture is present.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-shrinking, non-cracking:\u003c\/strong\u003e Remains flexible after cure, reducing the chance of gaps reopening under vibration compared with solvent-based sealers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick paintability:\u003c\/strong\u003e Can be painted over in about 30-45 minutes, speeding up repair work and masking downtime between steps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThick consistency:\u003c\/strong\u003e Fills large voids and can be smoothed to a featheredge or brushed for a neat finish on seams and joints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh solids, black color:\u003c\/strong\u003e Delivers good coverage and a durable, dark finish that blends where black seam seal is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis seam sealer is best for automotive body shops, collision repair technicians and experienced DIYers who need a durable, permanently flexible urethane to seal seams, gaps and joints. It is particularly useful where vibration and exposure to moisture are expected, and for projects that require filling larger voids with a product that sands and paints quickly.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users who need an all-purpose household caulk for non-automotive surfaces or those who require a color-matching OEM sealer in a different shade; likewise, customers who need an included nozzle or specialty dispensing accessory should plan to provide their own application tip or tool.\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\u003eHigh solids, thick paste provides excellent fill for seams and gaps with good workability.\u003c\/li\u003e\n\u003cli\u003eRemains flexible after cure and resists cracking under vibration and moisture exposure.\u003c\/li\u003e\n\u003cli\u003eAdheres well to bare metal, primed metal and painted surfaces for versatile use.\u003c\/li\u003e\n\u003cli\u003eQuick paintability allows painting after 30-45 minutes to keep projects moving.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users report mixed results with paint adhesion over the cured sealer, so spot testing paint compatibility is advisable.\u003c\/li\u003e\n\u003cli\u003eNo application nozzle included in the pack, so an appropriate tip or gun may be needed separately.\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\u003e3M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e08367\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume per cartridge\u003c\/td\u003e\n\u003ctd\u003e310 mL \/ 10.5 fl oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003ePack of 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKey properties\u003c\/td\u003e\n\u003ctd\u003eSingle component, moisture curing, high solids\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePerformance\u003c\/td\u003e\n\u003ctd\u003ePermanently flexible, non-shrinking, non-cracking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 3M Urethane Seam Sealer 08367 is a solid choice for professionals and skilled DIYers who need a thick, high-solids urethane that cures to a flexible, durable seal. Its quick paintability and strong adhesion to metal and painted surfaces make it good value for repair work, though users should verify paint compatibility and provide their own nozzle for application.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this sealer be painted shortly after application?\u003c\/strong\u003e\u003cbr\u003eYes; painting is typically possible after 30-45 minutes, though full cure time will be longer and testing with your paint system is recommended.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this adhere to bare metal and painted surfaces?\u003c\/strong\u003e\u003cbr\u003eYes; the single component formula is designed to adhere well to bare metal, primed metal and painted surfaces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this sealer suitable for humid, high-heat environments?\u003c\/strong\u003e\u003cbr\u003eYes; its moisture curing property provides reliable performance in high heat and humidity conditions.\u003c\/p\u003e","brand":"3M","offers":[{"title":"Default Title","offer_id":48667172241627,"sku":"B0D2P994T7","price":59.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71x5OZv6TUL._SL1500.jpg?v=1778626549","url":"https:\/\/gearmusthave.com\/products\/3m-urethane-seam-sealer-08367-black-high-solids-flexible-pack","provider":"GearMustHave","version":"1.0","type":"link"}