{"product_id":"3m-7000049438-dual-lock-fastener-sj3871-black-1in-x-45yd","title":"3M 7000049438 Dual Lock Fastener SJ3871 Black 1in X 45yd","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe 3M 7000049438 is a Dual Lock reclosable fastener in the SJ3871 series, designed for secure, tool-free mechanical attachment across a wide range of surfaces. The fastener strip features 400 mushroom-shaped stems per square inch of black polypropylene, backed by a modified acrylic pressure-sensitive adhesive for direct surface bonding. Engaged thickness measures 0.24 inches, providing a low-profile yet firm closure. The system is rated for a closure life of 1,000 cycles and offers temperature resistance up to 180 degrees F, making it suitable for both indoor and outdoor installations where repeated access is required.\u003c\/p\u003e\n\u003cp\u003eThis fastener is commonly used in commercial, industrial, and light trade applications where panels, covers, or components need to be removed and reinstalled regularly without fasteners or tools. Typical scenarios include securing electrical enclosure covers, HVAC access panels, ductwork insulation blankets, and equipment housings. The adhesive is formulated to bond to many plastics including polyethylene, acrylic, and polycarbonate, as well as ABS, powder-coated surfaces, and medium to low surface energy materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e400 stems per square inch for consistent, repeatable closure strength\u003c\/li\u003e\n  \u003cli\u003eModified acrylic adhesive bonds directly to plastic, coated, and low surface energy substrates\u003c\/li\u003e\n  \u003cli\u003eRated for 1,000 open-and-close cycles for long-term reliability\u003c\/li\u003e\n  \u003cli\u003eTemperature resistance up to 180 degrees F supports medium-temperature environments\u003c\/li\u003e\n  \u003cli\u003eBlack polypropylene construction resists moisture for indoor and outdoor use\u003c\/li\u003e\n  \u003cli\u003e1-inch width by 45-yard roll length for high-volume or large-area applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for bonding to many plastics including polyethylene, acrylic, polycarbonate, and ABS, as well as powder-coated paints and medium to low surface energy materials in indoor and outdoor environments.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eSurface preparation is critical for adhesive performance — clean and dry the substrate thoroughly before applying the fastener strip, removing any oils, dust, or coatings that could reduce bond strength. Apply firm pressure along the full length of the strip after placement to ensure proper adhesive contact. Allow the adhesive to dwell for the manufacturer-recommended time before loading the joint. This product is not intended for use on high-temperature surfaces exceeding 180 degrees F.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: SJ3871\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStem Density\u003c\/strong\u003e: 400 stems per square inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngaged Thickness\u003c\/strong\u003e: 0.24 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClosure Life\u003c\/strong\u003e: 1,000 cycles\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Resistance\u003c\/strong\u003e: 180 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 45 yards per roll\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Polypropylene with modified acrylic adhesive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication Environment\u003c\/strong\u003e: Indoor and outdoor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 5 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: Roll\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: 3M\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7000049438\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"3M","offers":[{"title":"Default Title","offer_id":51343927705906,"sku":"7000049438","price":1217.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310523993.jpg?v=1782025727","url":"https:\/\/voomisupply.com\/products\/3m-7000049438-dual-lock-fastener-sj3871-black-1in-x-45yd","provider":"Voomi Supply","version":"1.0","type":"link"}