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 watertight sealant provides up to 3 hrs 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.
- Offers compression and extension capability of +/-31% for dynamic and static construction joints
- 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
- Formulated as a re-enterable and repairable solution
- Sealant is paintable with primer
| Application Method | Caulk Gun |
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| Color | Light Gray |
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| Compositions | Calcium Carbonate Poly(Dimethyl siloxane) Siloxanes Silicones Di-Me Hydroxy-Terminated Ketoxime Silane Amorphous Silica (Trimethoxysilylpropyl)Ethylene diamine Octamethylcyclotetrasiloxane Quartz Silica |
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| Container Type | Cartridge |
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| Flash Point | 212 deg F |
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| Form | Paste |
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| Net Content | 10.1 oz |
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| Odor/Scent | Low |
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| Specific Gravity | 1.31 to 1.33 |
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| Tensile Strength | 80 psi |
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| Type | Watertight |
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| VOC Content | 250 g/L |
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