Therm-A-Foam is a preformed linear joint seal comprising one or more layers of 10mm or 20mm flame retardant polyurethane foam coated on both sides with Therm-A-Flex intumescent material.
These layers are combined to produce a product suitable for sealing a range of gaps sizes in building structures.
The flexible open cell foam structure allows Therm-A-Foam to compress by approximately 50%, thereby enabling it to take the
shape of the building joint it is protecting.
At approximately 180°C the installed Therm-A-Flex begins to expand. During this expansion the flame retardant foam degrades and is replaced by the expanding intumescent graphite thus providing fire protection to the building joint.
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