Nullifire FS703 Fire Resistant Silicone Sealant - All Types

• Up to 4 hours fire resistance - Tested to EN 1366-4
• Tested in gaps 10 - 220 mm
• Ideal for joints in rigid walls & floors, windows & door frames
• Airtight up to 600 Pa
• Superior elasticity
• Excellent tooling properties
• UV & weather resistance
• 25% Movement capability according to BS EN ISO 11600
• 20% movement when used with FJ203 as a weather seal

Joints: Nullifire FS703 is a high-performance intumescent acrylic sealant designed for use in walls, floors, and other construction joints. It effectively restores the fire resistance of these elements by sealing gaps and joints, preventing the spread of fire, smoke, and toxic gases. FS703 is highly flexible, accommodating movement in joints while maintaining its fire-stopping integrity. It adheres well to most construction materials, making it suitable for a wide range of applications in both new and existing buildings. This sealant is an essential choice for ensuring robust passive fire protection in compliance with fire safety standards.

Is Nullifire FS703 suitable for acoustic insulation?

Yes, FS703 also provides excellent acoustic insulation, reducing sound transmission through sealed joints and gaps.

Can FS703 be painted over?

Yes, once cured, FS703 can be painted with most water-based or emulsion paints.

How is Nullifire FS703 applied?

• Clean and prepare the surface.
• Use a standard caulking gun to apply the sealant.
• Tool the sealant to ensure a smooth finish and good contact with the substrate.