3M™ fire barrier watertight sealant 1000 NS is a ready to use, single component, neutral-cure, silicone sealant that cures upon exposure to atmospheric humidity to form a flexible firestop seal. Our water tight sealants help control the spread of fire, smoke and noxious gases before, during and after exposure to fire. We formulated 3M™ fire barrier watertight sealant 1000 NS as a single component, neutral cure, silicone sealant. This ready to use sealant cures upon exposure to atmospheric humidity to form a flexible firestop seal that helps control the spread of fire, smoke and noxious gases before, during and after exposure to fire. When properly installed, this water tight sealant provides up to 3 hr protection in tested and listed systems and meets ul water leakage test, W-rating - class-1 requirements for systems tested and listed in accordance with ANSI/UL 1479. We designed this non-slump firestop sealant as a re-enterable and repairable solution primarily used on vertical surfaces.

3M™, 7000059388, Fire Barrier Sealant, Watertight, Cartridge Container, 10.1 fl-oz Container, Composition: Calcium Carbonate, Poly(Dimethylsiloxane), Siloxanes, Silcones, Di-Me, Hydroxy-Terminated, Ketoxime Silane, Amorphous Silica, (Trimethoxysilylpropyl) Ethylenediamine, Octamethylcyclotetrasiloxane, Quartz Silica, Paste Form, Fire Rating: 3 hr, Gray, Low Odor/Scent, 300 deg F, 1.31 to 1.33 Specific Gravity, >212 deg F Flash Point, <=53 g/L VOC, Flammability: 1, 85 psi Tensile Strength

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• Meets ul water leakage test, w-rating (class 1 requirements)
• Excellent caulk rate and sealant can be applied with conventional caulking equipment
• Non-slump, halogen-free formula provides strong adhesion
• Exceptional weatherability for durability during construction
• Minimizes noise transfer (stc-rating of 56 when tested in stc 56 rated wall assembly)
• Formulated as a re-enterable and repairable solution
• Sealant is paintable with primer
• Self-leveling formula is optimal for horizontal applications, eliminating the need for tooling
• Single component sealer is ready to use with no mixing required
• Neutral cure delivers higher adhesion with very little odor
• Halogen-free formula helps control spread of noxious gasses, smoke and flame