{"product_id":"specseal-lc129-endothermic-firestop-sealant-29-oz-tube","title":"SpecSeal LC129 Endothermic Firestop Sealant – 29 oz Tube","description":"\u003cp\u003eSpecSeal LC129 is a high-solids, latex-based endothermic firestop sealant in a 29 oz tube. When properly installed in an applicable listed system, it seals penetration openings against the spread of fire, smoke, hot gases, and water. Use it for construction joints, gaps, and noncombustible penetrations covered by the specified design.\u003c\/p\u003e\n\u003ch2\u003eApplication and Adhesion\u003c\/h2\u003e\n\u003cp\u003eSpecSeal LC sealant adheres well to virtually all construction surfaces and applies with a standard caulk gun sized for the 29 oz tube. For larger applications, you can trowel it on with a standard mason’s trowel or apply it with a putty knife. Follow the applicable listed design for backing, sealant depth, and other installation requirements.\u003c\/p\u003e\n\u003ch2\u003eFlexible Seal With Minimal Shrinkage\u003c\/h2\u003e\n\u003cp\u003eSeries LC dries with minimal shrinkage to form a flexible seal. Its endothermic fillers absorb heat and release water. Once dry, the latex binder resists water and will not re-emulsify, and the surface can be painted. The compound is non-halogenated and contains no asbestos or inorganic fibers.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard-tool application:\u003c\/strong\u003e Apply with a 29 oz caulk gun, mason’s trowel, or putty knife\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimal shrinkage:\u003c\/strong\u003e High-solids formula dries to a flexible seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater resistance after drying:\u003c\/strong\u003e Latex binder will not re-emulsify\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePaintable finish:\u003c\/strong\u003e Paint once the sealant is dry\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFire Resistance in Listed Systems\u003c\/h2\u003e\n\u003cp\u003eSpecSeal Series LC has been tested for up to 4 hours of fire resistance under ASTM E1966\/UL 2079, ASTM E814\/UL 1479, and CAN\/ULC-S115. It is listed in more than 80 UL-tested firestop systems. The rating and suitability depend on the specific tested assembly and installation; these results do not give every LC129 application a 4-hour rating.\u003c\/p\u003e\n\u003ch2\u003eLC129, LC120, or LCI?\u003c\/h2\u003e\n\u003cp\u003eLC129 and the \u003ca href=\"https:\/\/timothystoolbox.com\/products\/lc120-firestop-sealant-20-oz-sausage-ul-listed-endothermic-fire-sealant\"\u003eSpecSeal LC120 20 oz sausage\u003c\/a\u003e belong to the same LC endothermic sealant family, but their package formats differ. LC129 is the 29 oz tube; LC120 is the 20 oz sausage.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/timothystoolbox.com\/products\/sti-lci-intumescent-firestop-sealant-29-oz\"\u003eSpecSeal LCI intumescent sealant\u003c\/a\u003e is a separate product family. Don't treat LC and LCI as interchangeable. Use the sealant named in the applicable listed design.\u003c\/p\u003e\n\u003ch2\u003eSystem Selection and Electrical Safety\u003c\/h2\u003e\n\u003cp\u003eLC129 isn't suitable for every fire-rated assembly. The applicable listed system determines the assembly, penetrant, annular space, backing material, and sealant depth. Check the \u003ca href=\"https:\/\/systems.stifirestop.com\/\"\u003eSTI system finder\u003c\/a\u003e for a design that matches your application; the product name alone doesn't establish a fire rating.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eElectrical warning:\u003c\/strong\u003e This sealant contains water and is electrically conductive until dry. Do not apply it to or in the presence of energized electrical conductors. Do not apply it in the presence of exposed electrical conductors.\u003c\/p\u003e\n\u003cp\u003eBrowse the \u003ca href=\"https:\/\/timothystoolbox.com\/collections\/firestop-sealants-and-fire-tape\"\u003efirestop sealants and fire tape collection\u003c\/a\u003e to find the product specified for your application.\u003c\/p\u003e","brand":"Specified Technologies Inc","offers":[{"title":"1 Tube","offer_id":41899308122170,"sku":"STILC129","price":19.99,"currency_code":"USD","in_stock":true},{"title":"Case of 12 Tubes","offer_id":41899308154938,"sku":"STILC129-12","price":219.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0039\/5106\/7205\/files\/01-specseal-lc129-29oz-tube-no-shadow-1000x1000.jpg?v=1793986765","url":"https:\/\/timothystoolbox.com\/products\/specseal-lc129-endothermic-firestop-sealant-29-oz-tube","provider":"Timothy's Toolbox","version":"1.0","type":"link"}