FIRESOUND™ is formulated primarily to perform as a barrier to the incursion of fire through expansion joints and wall penetrations such as pipes or cables. FIRESOUND™ is also an effective acoustic sealant.
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Due to variations in fire & acoustic rating results using different thickness & types of substrates advice should be sought concerning the suitability of Firesound™ in specific applications. For external use, Firesound™ sealant must be protected from rain or water, until such time as the sealant builds up a thick skin to avoid washout. Therefore do not apply sealant when rain exposure is likely, or before a thick skin can develop. This is typically 24 hours in summer (25 to 30°C), but will be significantly longer in winter, or times of high humidity. Not suitable for use in water retaining structures or where water pooling may occur. Do not apply on wet substrates.
All surfaces must be clean, dry, sound and free of dust, oil, old sealant or other contamination.
Application: Apply Firesound™ in ambient conditions between 5 and 35°C. Higher or lower temperatures should be avoided e.g. above 35°C to prevent the possibility bubbling of the sealant due to rapid moisture evaporation. Do not apply below 5°C.
Fill joint with trowel or caulking gun, then tool off with a spatula and clean off excess with a damp cloth.
Protect from water for at least 24 hours or until a suitable skin has formed (will require significantly longer at temperatures below 15°C). Some shrinkage is normal during curing, and should be anticipated when measuring joints.
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