Acoustic Intumescent Sealant is used to seal gaps of up to 30mm in block walls, partitions and door frames.
  
1) Remove all loose debris, oil and grease from the joint.
 
2) Mask the adjacent surfaces to the joint.
  
3) Ensure that the joint is filled using an appropriate backing material for the fire rating you are trying to achieve.
 
 4) Remove masking.
  
Do not apply the sealant if the ambient temperature is below 5^oC as adhesion will be impaired.