Acoustic and Intumescent Sealant is an absolute essential for soundproofing. General advice for the majority of soundproofing products, especially with the use of Acoustic Plasterboard, or installing rigid materials, is to leave a 2-5mm gap from the perimeter to reduce 'Flanking Transmission', a negative impact of sound taking an alternative route to the direct and 'obvious' path, for instance through the wall and not the two adjacent walls. This form of 'Flanking Transmission' is where the two solid materials in contact quickly pass through vibration, and the Acoustic Sealant acts almost like a putty, it does not set solid. Acoustic Sealant is also to be used between Acoustic Plasterboard layers, and on each sheet, to increase the air-tightness of the 'acoustic barrier'.
 
900ml tubes (requires 900ml applicator gun)
Non-flammable 
Covers approximately 32 linear meters with a 5mm thick bead
Please allow about 24 hours curing time before decorating over (4-5 days in a damp environment)