3M Fire Barrier Watertight Sealant 1000 NS– 4.5 Gallon pail

The 3M™ Fire Barrier Watertight Sealant 1000 NS delivers reliable firestop and waterproof protection for commercial, industrial, and residential applications. Engineered for metal pipes, cables, concrete, and construction joints, this neutral-cure silicone sealant offers up to 3 hours of fire resistance (ASTM E814 / UL 1479) and a watertight seal for both interior and exterior use.

Its non-slump formulation allows precise application on vertical and overhead surfaces without sagging, while maintaining flexibility over time. The sealant is weather-resistant, paintable, and halogen-free, making it suitable for mechanical rooms, utility penetrations, and high-humidity environments.

Designed for quick, clean installations, 3M™ 1000 NS reduces rework costs and provides code-compliant fire protection in walls, floors, and ceilings.

Key Features:

• Up to 3 hours fire rating (ASTM E814 / UL 1479, CAN/ULC S115)

• Watertight sealant prevents moisture intrusion

• Neutral-cure silicone for flexibility and long-term adhesion

• Non-slump formula for vertical applications

• For penetrations, construction joints, and perimeter seals
  

• Meets building code firestop and sound requirements
  
  

Order now from National Hardware Sales Ltd (Canada) for competitive pricing, reliable shipping, and expert-approved 3M fire protection products.