Intumescent Fire Sealant – Acoustic – Residential & Commercial Use

Product Overview

This high-strength, permanently flexible intumescent acrylic compound is designed for sealing and bonding plasterboard and insulation boards in fire-rated and acoustic-controlled environments. It combines the performance of a sealant and adhesive, forming a dense, resilient barrier that expands under fire exposure to maintain compartment integrity.

Water-based and solvent-free, it is simple to apply, non-flammable, and easily cleaned with water. It achieves up to five hours of fire resistance when tested to EN1366-4:2006, offering a 25% performance increase over standard fire-rated sealants. Once cured, it remains flexible and resistant to cracking, ensuring long-term acoustic and thermal stability in joint and panel systems.

With a density of approximately 1.6 – 1.65 g/cm³ and a Shore A hardness of around 40, this sealant provides a stable, smooth seal with low slump characteristics, even on vertical joints. It performs reliably between –15 °C and +70 °C and maintains its integrity across various building materials including plasterboard, timber, metal, and blockwork.

Features & Benefits

• High fire resistance: Provides up to 5 hours of fire-rated sealing performance when tested to EN1366-4:2006.
• Acoustic barrier: Seals joints to minimize sound transmission between plasterboard walls, ceilings, and floors.
• Dual-purpose formulation: Functions as both an intumescent sealant and a strong bonding adhesive for plasterboard and insulation panels.
• Permanent flexibility: Retains elasticity to accommodate minor movement and prevent cracking.
• Water-based and solvent-free: Safe, non-flammable, and easy to clean up with water.
• Excellent adhesion: Bonds to plasterboard, timber, metal, and blockwork without the need for primers on most substrates.
• Mold resistant: Maintains a clean, durable finish in long-term installations.
• Low slump performance: No slumping in vertical joints up to 20 mm × 10 mm at 25 °C.
• Temperature range: Suitable for application between +5 °C and +40 °C; serviceable from –15 °C to +70 °C.
• Cartridge size: 900ml capacity for large-area sealing and bonding applications.

FAQs

Q: How long does the sealant last?

A: The sealant provides long-term stability and remains effective for years when applied correctly.

Q: Is this product suitable for exterior use?

A: It is designed primarily for interior applications, but consult the technical guidelines for specific exterior use cases.

Q: Can it be painted over?

A: Yes, once fully cured, the sealant can be painted to match the surrounding decor.