Therm-A-Foam
The table in the description below provides a guide to the correct Therm-A-Foam dimensions for a range of building joint widths and fire resistance requirements.
Available Downloads:
Enquire NowRequest BrochureThe table in the description below provides a guide to the correct Therm-A-Foam dimensions for a range of building joint widths and fire resistance requirements.
Available Downloads:
Enquire NowRequest BrochureTherm-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.
| Fire Resistance | |||||
| 60 mins | 90 mins | 120 mins | 180 mins | 240 mins | |
| Gap Width | Depth of Firefoam fill required | ||||
| 10 | 25 | 25 | 25 | 35 | 40 | 
| 20 | 25 | 25 | 30 | 40 | 50 | 
| 30 | 25 | 25 | 30 | 40 | 50 | 
| 40 | 30 | 30 | 35 | 45 | 55 | 
| 50 | 35 | 35 | 45 | 60 | 75 | 
| 60 | 35 | 35 | 45 | 65 | 90 | 
| 70 | 40 | 40 | 50 | 75 | 105 | 
| 80 | 40 | 40 | 50 | 85 | 105 | 
| 90 | 45 | 45 | 55 | 85 | 105 | 
| 100 | 50 | 50 | 60 | 85 | 105 | 
Linear dimensions in mm
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