Bostik 30614300 Fire & Acoustic Sealant, Up to 4 Hours of Fire Resistance, Sound Deadening Properties, Colour: White, Size: 290ml (Pack of 2)

This is good quality sealant. I used for soundproofing panels and worked perfectly. Very easy to use. The cannister is a standard size and two of these did 9 1.5mx1.5m panels

I haven't really used it yet. But it will do the job nicely. It seems easy to use and apply. It says it will give a good sealant and stickiness

Easy to use, quality material. I used to fill up the hole around radiator pipes. It hardened quickly, sealed the hole fine and it still does its job after 2 heating seasons. Good value for money, I can only recommend it.

Sealed my office/studio room with this and instantly blocked the majority of airborne noise from downstairs. Flexible and does not crack unlike regular caulk.

This stuff cures so quickly you barely have any time to smooth it off. You're not supposed to use a wet finger with it either so you're racing against time trying to get it right with whatever tool you're using. Only saving grace is that it can be sanded once dry.On the plus side it stayed white, but as for the acoustic properties I'm not sure it's up to it. Used it on a window frame, no gaps but no better sound wise. Can't say for sure if it's the sealant or a different problem with the window.

Had to seal around a pipe at work & it had to be fire-rated. Came across this product & with the price it was a no-brainer. Pumped some in around the pipe to fill the gap & used a filling knife to spread it evenly. Job done