Fireproof Sealants

Fireproofing and intumescent sealants

Click for more


At Bostik, we understand that meeting fire safety standards is essential to all areas of industry. With construction being one of our major areas of expertise and innovation, we strive to uphold the highest levels of fire safety through our cutting-edge sealant technologies.

From mortars to silicone and acrylic sealant formulations, all of our fireproofing solutions are ideal for commercial applications, possessing fire resistant properties with exceptional longevity, as well as greatly reducing the formulation of smoke and other harmful toxins.

Fireproofing: sealant applications

We understand that all door and window frames within a commercial property need to be effectively fireproofed.

Our intumescent sealants are perfectly formulated for the purpose of high quality fire-retardancy in accordance with BS 476 standards. When subjected to high heat, our smart sealants swell in order to fill any potentially hazardous gaps. This forms an insulating char that prevents the permeation of smoke and flame, enabling your installation to withstand extreme temperatures for a minimum of four hours while maintaining structural integrity.   

Some of our fireproofing products can also deaden excess noise, and most solutions highly accommodate joint movement – working to fill the most irregular cavities. 

Bostik fireproofing sealants are suitable for all forms of ventilation, piping, expansion and construction joints, and can bond to an impressive range of substrates – from wood, metal and glass to masonry, concrete and timber. 

Construction sealants: sealant technologies 

Polyurethane (PU) sealant (PU) 

Bostik’s PU sealant is one of our strongest bonding and proofing solutions. We provide both one part polyurethane sealant and two part polyurethane sealant, as well as 2-in-1 adhesive and sealant products. 

Learn more about our polyurethane products

Silyl modified polymer (SMP)

Our SMPs are acid-free and are capable of bonding to the same variety of substrates as a standard silicone sealant, but possess a much higher bond and peel strength.

Learn more about our silyl modified polymer products

Silicone sealant 

A more versatile formulation, all our silicone sealants are acid-free and have very low emission rates. This makes them ideal for sensitive substrates as concrete and natural stone.

Our silicone sealant range includes both low and mid modulus products and comes in fire-resistant formulations, allowing you to select the most appropriate level of elasticity for your individual needs.  

Learn more about our silicone sealant products

Mastic sealant

Our mastic or ‘oil-based’ sealants have a simple but highly effective functionality, possessing an unparalleled compatibility with timber and windows.

Working chiefly with exterior assembly processes, Bostik’s mastic technologies work well with roofing materials, concrete and brick.

Read more


Interactive Graphic

back to top