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Acoustic Sealant 900ml

Dimensions: 293mm x 62mm x 62-270mm cut out

Weight: 1.6kg

For: Every internal application.

Compliance: Compliant with Part E Building Regulations (England, Wales, Northern Ireland and the Republic of Ireland).*

Installation: Used with a Jumbo Applicator Gun, specific installation found in the 'Install' tab below

When: Between all plasterboard products and around perimeters where it is advised to leave a 2-5mm expansion gap.

Essential for almost every soundproofing project, to be used in all perimeter gaps and sealing between Acoustic Plasterboards, and MuteBoard™. To be used with a Jumbo Applicator Gun.

More Information

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)
With large projects and the number of gaps that often require sealing, a 300ml requires a very frequent changeover which can cost time. With the use of an Acoustic and Intumescent, it helps with smoke prevention in the case of a fire by expanding with the heat and remains viscous and flexible under the correct temperature range as hardening will cause vibration to transfer into the adjacent surfaces.
At first, you will want to cut the nozzle to a pea size opening for an approximate 5mm bead application and puncture the tin lid on the inside with a screwdriver or other device long enough, forgetting to do so could cause the adhesive to come from the other end when pressure is applied to the applicator gun.
When dried the sealant will remain a white colour, the sealant can be sanded down and painted over during decoration.

Installation Guide

Cut off a suitable section from the plastic nozzle, usually, a pea-size exit hole will give you a suited bead.

Pierce the metal lid through the nozzle with a screwdriver or other long device to expose the sealant, forgetting to do this may cause the sealant to come out of the back of the cartridge when applying pressure with the gun.

Lock into the Jumbo Applicator Gun, a 300ml will not be suitable here.

Apply force to the gun to expose sealant, if none appears to be coming out with force applied, try making sure the metal lid was pierced correctly.

Apply to installation instructions given on that particular Acoustic System.

Sound insulation advice for Part E

Soundproofing Floors
Soundproofing Floors
Soundproofing Designs for Party Floors to achieve compliance with Part E of the Building Regulations.
Soundproofing Walls

Soundproofing Walls

Soundproofing Designs for Party Walls to achieve compliance with Part E of the Building Regulations.

Related Products

MuteBoard™ 2
MuteBoard™ 3
MuteBoard™ 4

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