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AC50 acoustic selalant

AC50 acoustic sealant

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£3.43£6.07 ex. VAT


AC50 is available in two sizes 380ml (standard) and 900ml (large). AC50 Acoustic Sealant and Adhesive is a high strength, permanently flexible acoustic sealant and adhesive specifically formulated for sealing and bonding plasterboard and other insulation boards to common substrates. One small tube of sealant will be enough to seal approximately five soundproofing panels at 1200mm x 1200mm. You will need the jumbo sealant gun applicator for the 900ml tubes of sealant.

Call 01423 339163 for all enquiries. FREE DELIVERY ON ORDERS OVER £750ex.VAT



AC50 Acoustic Sealant

AC50 is available in two sizes 380ml (standard) and 900ml (large). AC50 Flexible Sealant and Adhesive is a high strength, permanently flexible acoustic sealant and adhesive specifically formulated for sealing and bonding plasterboard and other insulation boards to common substrates.

One small tube of AC50 acoustic sealant will seal the edges of approximately five 1200mm x 1200mm soundproof panels.


  • Strength permanently flexible sealant
  • High grab
  • Adheres to most surfaces
  • Mould resistant
  • Non flammable and fire rated
  • Over paintable
  • Easy clean up
  • Areas for Use
  • To form an acoustic barrier by sealing gaps between plasterboard walls, floors and ceilings and in dry lining applications.
    As an adhesive to bond plasterboard to plasterboard, wood and metal studding and direct to block work.
    For sealing and bonding most other Kraft lined insulation boards.
  • Damp or humid conditions will significantly extend the cure time
  • Do not attempt to abrade when cured
  • Do not over paint until product has fully cured. This will normally be 24 hours but may be 4-5 days in damp, cold or humid conditions
  • Do not apply below 5°C
  • For overhead boarding applications, always use in conjunction with mechanical fixings.

Surface Preparation

All surfaces must be clean and dust free. All loose or flaking surface coatings, and old sealant and mastic joints, should be removed before application. Highly porous substrates such as new plaster should first be primed with PVA bond diluted 1:4 with water. Surfaces may be slightly damp, but not wet. NOTE: THIS WILL SLOW THE CURE.


  • 900ml tubes: Fit cartridge into a jumbo sealant gun. Cut nozzle to required length and puncture inner membrane seal before applying
  • 380ml tubes: Cut the tip of the cartridge taking care not to damage the thread. Apply nozzle and cut cleanly at an angle of 45′
  • Use as a sealant: Always cut nozzle to a size slightly larger than the gap to be sealed. Apply to gap, slightly overfilling and finish smooth with a caulking tool or filler knife
  • Clean up any excess with a damp cloth within 30 minutes of application
  • Use as an adhesive for direct bonding to large surfaces: Cut nozzle to provide a bead of approximately 9-10mm diameter and apply a continuous bead to one surface at 250-350mm centers. Apply board immediately to surface and tamp down. Provide temporary support until cured
  • Use as an adhesive for bonding to studding: Apply a continuous bead to studding and apply board immediately into position. Do not apply more than one board’s width of studding at one time. Provide temporary support until cured.

Additional information

Weight2 kg
Choose size

380ml standard, 900ml large

AC50 acoustic sealant

Product information


Noisestop Systems deliver soundproofing throughout the UK using a pallet distribution network. Using this method of delivery we are able to supply materials nationwide quickly and at competitive rates. For smaller items we use a courier network to deliver smaller parcels.

We aim to ship orders within 2-3 working days. Once you have placed an order we will arrange a suitable delivery date for you. If you order over the phone the delivery date will be confirmed with you at that point. If you have placed your order online we will contact you to arrange a suitable delivery date.

Please let us know of any restrictions at your delivery address for HGV wagons in order or us to pass the information on to the delivering company.

FREE shipping on orders over £750 ex. VAT

Delivery costs

  • Small items we can courier £20 ex. VAT.
  • Large items sent on a pallet standard charge across UK to most postcodes £33 ex. VAT.
  • Large items sent on a pallet to the following postcodes AB, DD, IV, KW, PA, PH, IM, BT, JE, GY will be charged at £53 ex. VAT. This is due to higher delivery costs to these postcodes.

When your delivery arrives

It is important to sign for the delivery when it arrives. You should note any shortages or damage to your order when you accept the goods in the unfortunate cases when materials are damaged in transit. This will enable us to swiftly resolve the issue and have replacements sent out.

The delivery is a curb side delivery service; drivers will not carry goods into the property. The pallet will be dropped as near to the property as possible.

Returning Goods

We are happy to accept goods that are not needed due to over ordering, returns will be charged at the cost of arranging the collection with the collecting company, and this will be confirmed at the point of arranging the return. Please contact us to make arrangements to return goods, call 01423 339163.

For enquiries please call 01423 339163, or send us a message via our contacts page.

How many tubes of acoustic sealant will I need?

Answer: We work on a basis of one standard tube of acoustic sealant for every five Noisestop soundproofing panels 1200mm x 1200mm. This can vary depending on the individual installation.

Can you decorate over the sealant?

Answer: AC50 acoustic sealant can be over painted or plastered to complete the installation.

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AC50 acoustic sealant

£3.43£6.07 ex. VAT