Intumescent Sealant – Fire-Resistant – Residential & Commercial Use

Product Overview

The Fire-Resistant Intumescent Acrylic Sealant in White is provided in a 295ml cartridge. This single-component, emulsion acrylic-based sealant offers fire-resistant and acoustic joint sealing for various fire-rated structures. When exposed to high temperatures above 125°C, it expands over 150% of its original volume, forming an insulating char barrier that prevents the passage of fire, smoke, and toxic gases. Its permanently flexible formulation allows for movement up to ±7.5% without losing adhesion, suitable for joints up to 50mm wide. It maintains stability and finish in interior applications, providing a reliable seal with a curing period of 3 to 5 days at room temperature.

Features & Benefits

• Fire protection performance: Expands upon heat exposure, creating a protective char that resists fire and smoke for up to 4 hours under tested conditions.
• Acoustic insulation: Achieves an average noise reduction of 24 dB across the 100–3150 Hz range, ideal for soundproofing partition walls and service penetrations.
• Ease of application: Non-slump formula allows smooth tooling and clean edges on vertical and overhead joints.
• Fast curing: Tack-free in approximately 15 minutes, enabling early overpainting and reduced downtime on site.
• Durable flexibility: Maintains elasticity with over 100% elongation to ISO 8339, ensuring long-term joint integrity.
• Surface compatibility: Bonds well to most construction materials without a primer; suitable for masonry, plasterboard, timber, and coated metals.
• Overpaintable finish: Accepts most water-based and solvent-based paints once cured, matching surrounding finishes.
• Temperature activation: Intumescent expansion begins at approximately 125°C, providing an active fire-sealing response.
• Maximum joint width: Designed for use in joints and voids up to 50mm wide, ensuring full seal coverage in structural applications.

Applications

• Fire-rated joints: Sealing linear gaps and perimeter joints in walls, floors, and partitions to maintain fire compartment integrity.
• Penetration seals: Around pipes, conduits, and cables where they pass through fire-rated walls or floors.
• Door and window perimeters: Internal pointing of fire-rated frames to preserve the integrity of compartment lines.
• Acoustic control: Reducing airborne sound transmission in partition junctions and service openings.
• Interior use: Ideal for dry, internal building environments requiring both fire resistance and sound insulation.

Frequently Asked Questions

• How long does it take to cure?

  The sealant cures in approximately 3 to 5 days at room temperature.

• Can this sealant be painted over?

  Yes, it can be overpainted with most water-based and solvent-based paints once fully cured.

• What materials is this sealant compatible with?

  It bonds well with masonry, plasterboard, timber, and coated metals without a primer.