Question 1

1. What is intumescent sealant?

Accepted Answer

Intumescent sealant is a fire-rated mastic that expands when exposed to heat, forming a protective barrier that slows fire and smoke spread through joints and openings.

Question 2

2. How does intumescent fire sealant work?

Accepted Answer

When exposed to high temperatures, the material expands and forms a solid, carbon-rich layer, called a ‘char layer’. This fills gaps and helps block fire and smoke paths. This fills gaps and helps block fire and smoke paths. The expansion is triggered by heat, creating an insulating barrier that slows heat transfer and helps maintain fire resistance.

Question 3

3. Can intumescent sealant provide acoustic performance?

Accepted Answer

Yes, many products are designed as acoustic intumescent sealant. They help reduce sound transfer while maintaining fire resistance.

Question 4

4. Is intumescent sealant suitable for outside uses?

Accepted Answer

Some types, such as silicone-based products, are suitable for external conditions. Always check the product specification for exposure and movement capability.

Intumescent sealant

Fire Mate Intumescent Acrylic Sealant 295ml White

Everbuild AC95 Intumescent Acoustic Sealant And Adhesive White 900ml

Rockwool Firepro Acoustic Intumescent Sealant 310ml

Rockwool High Expansion Intumescent Sealant 310ml

Thermoguard Thermocoat WI Steel Intumescent Paint 5kg

Penosil Fire Stop Intumescent Sealant 680 - White x 300ml (Box of 24)