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AC50 acoustic selalant

AC50 Acoustic Sealant 380ml & 900ml

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£3.95£7.25 ex. VAT

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Delivery Information

Delivery charges £60ex.VAT is applied to most of the products we supply due to the weight and size of the materials.

£20ex.VAT for smaller items. This charge applies when smaller items are ordered individually without materials we must deliver on a pallet. Only the pallet charge will be applied when smaller items are purchased with materials delivered on a pallet.

Customer collections are available. You must arrange this with the sales team before the collection date. If you would like to collect materials, please call 01423 339163.

Goods delivered within 3-5 days.

Once you’ve placed your order, we will contact you to arrange a suitable delivery date.

Call 01423 339163 for more information

Find out more

AC50 acoustic sealant is a high-strength, permanently flexible acoustic sealant and adhesive. Acoustic sealants are specially formulated to seal the edges and around the perimeter of plasterboard walls and ceilings. One standard sealant tube will be enough to seal approximately five soundproofing panels at 1200mm x 1200mm. It’s available to buy in a standard 380ml or large 900ml size (you will require the large applicators to dispense the 900ml tubes).

Enquiries call 01423 339163


AC50 Acoustic Sealant

AC50 acoustic sealant is a high-strength, permanently flexible acoustic sealant and adhesive. Acoustic sealants are specially formulated to seal the edges and around the perimeter of plasterboard walls and ceilings. One standard sealant tube will be enough to seal approximately five soundproofing panels at 1200mm x 1200mm. It’s available to buy in a standard 380ml or large 900ml size (you will require the large applicators to dispense the 900ml tubes).

  • 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

Use this high strength sealant and adhesive to form an acoustic barrier by sealing gaps between plasterboard walls, floors and ceilings and applying dry lining.

It can be used as an adhesive to bond plasterboard to plasterboard, wood and metal studding and direct to block work. It’s also suitable for use when 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 overpaint until the product has fully cured. normally this will be 24 hours but maybe 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.


This dual-action sealant and adhesive are easy to apply yourself. When using a 380ml tube, cut the cartridge tip, taking care not to damage the thread. Apply nozzle and cut cleanly at an angle of 45°.

For 900ml tubes, you’ll need to fit the cartridge into a jumbo sealant gun. Cut nozzle to the required length and puncture inner membrane seal before applying.

Use as a sealant:

Always cut the nozzle to size slightly larger than the gap to be sealed. Apply to the 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 centres. Apply board immediately to the surface and tamp down. Provide temporary support until cured.

Use as an adhesive for bonding to stud frames:

Apply a continuous bead to studding and apply board immediately into position. Do not apply more than one board’s width of the stud frame at one time. Provide temporary support until cured.

If you have any questions about using this AC50 Acoustic Sealant and Adhesive in your home soundproofing project, don’t hesitate to contact our team of friendly experts.

Need help with your soundproofing call 01423 339163, alternatively send us your enquiry. You can upload any relevant documents such as plans, drawings and pictures.

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    Additional information

    Weight 2 kg
    Choose size

    380ml standard, 900ml large

    AC50 acoustic sealant

    Product information

    Delivery Information

    Standard Delivery

    Our standard delivery charges are based on the delivery method that is most suitable for the products ordered. Most of the goods we sell are delivered on pallets. Some smaller items will be delivered via courier.

    Standard delivery charge for goods delivered on a pallet is £60*

    Standard delivery charge for smaller items £20*

    Certain postcodes will incur additional charges. AB*, DD*, IV*, KW*, PA*, PH* will be charged at £110**. UK islands, including the following postcodes, will be charged £130*. PO30*, PO31*, PO32*, PO33*, PO34*, PO35*, PO36, PO37*, PO38*, PO39*, PO40*, PO41*, IM*, BT*, JE*, GY*

    If you have particular delivery requirements, please let us know at the point of order. It is possible to leave delivery instructions when you place an online order.

    Special Deliveries

    We can arrange to have orders delivered on Saturdays. A surcharge would be applied of an additional £50.

    Please call 01423 339163 if you require any of these additional services.

    How long will delivery take?

    We aim to despatch orders within 2-3 days of placing your order.

    If you order online, you will receive a confirmation email that we have received your order and it has been processed. We will then contact you once the order is just about ready to be dispatched to confirm a suitable delivery date. If you would like to discuss delivery times with us, please call 01423 339163. We recommend contacting us if you require the goods to be delivered on a specific date before placing your order.

    If you place an order over the weekend or on a Bank Holiday, this will be confirmed as an order on the first working day after the weekend or Bank Holiday.

    If you need goods in a hurry, give us a call. We carry most items in stock, which can be delivered quickly if required. Call 01423 339163.

    How will my order be delivered?

    The majority of orders we despatch are sent on pallets. We use a network of pallet distribution companies across the UK. All our pallet deliveries are kerbside deliveries. This means the pallet will be delivered as near to the delivery address as possible. Pallets are unloaded from the vehicles with a pallet truck. If it is possible the pallets can be dropped on driveways if they are accessible with the pallet truck.

    Pallet deliveries are typically made on 7.5-tonne vehicles that are similar in size to bin lorries. Occasionally larger vehicles are used. If you know of any reason why it might be difficult to deliver to your address with this type of vehicle, please let us know so we can pass the information on to the delivery company. Typical delivery problems can include parking restrictions, access issues for certain size vehicles, low bridges and overhanging trees. Call 01423 339163 if you are unsure.

    Unfortunately, the delivery drivers will not bring the goods into your property or unload the individual items from the pallets.

    Many of our heavy items require two people to carry them safely.

    All orders sent on pallets are wrapped and secured to the pallet to protect them while in transit. Once you have received your order, we would recommend storing the materials inside. If you plan on leaving your goods outside, you should use additional coverage to protect them from adverse weather conditions.

    Damaged or missing items

    If items are damaged or missing when your order arrives, you should sign damaged or missing items on the driver’s paperwork. Call 01423339163 to let us know of the issue to allow us to rectify the problem quickly.

    We might ask for a picture of the damage to speed up the process of arranging a suitable solution.

    To enable us to resolve any issues with your delivery, it is essential that you sign for your delivery when it arrives.


    Can I return items from my order? Yes, you can return unused items from your order that are in a salable condition. We can arrange to collect unused materials and bring them back to us. We would refund the cost of the items returned back to us, less the shipping cost incurred by the company collecting the items. The cost to return the goods would be confirmed at the point of arranging the return. The refund would be paid once the goods have been brought back and have been checked at our warehouse.

    Alternatively, you can arrange to return the materials back to us, and we will issue a refund once they have been received.

    *All prices displayed are exclusive of VAT @ 20%. This will be added at the end of the checkout process before you confirm your order.

    If you require any additional information regarding deliveries, please give us a call 01423 339163. Alternatively get in touch 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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