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Thompsons One Coat Damp Seal White 750ml (38631)

750ml. Only one coat required to permanently cover damp stains on interior walls and ceilings. Allows trapped moisture to escape but blocks stains. Decorate after 4 hours. White. Covers approx. 7m²/Ltr.

  • Dries in 4 Hours

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£12.55INC VAT (£16.73/Ltr)
Was £13.95 Save £1.40 (10%)

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Can you plaster on top or before

Asked by: Mgron
Thanks for your question. We would not recommend plastering on top of the Damp Seal, it is feasible to apply the product to new plaster but as the product acts as a damp stain blocker rather than a way to cure damp there would be little point in applying the product to new plaster.
Answered by: Thompson's Product Expert
Date published: 2017-04-26

Can I use this directly on new bare plaster or have to prime it first?

Asked by: DaveTich
Thanks for your question. Normally we would not advise the use of this product on new plaster. It is a product designed to block damp stains once the source of damp has been cured and therefore we wouldn't envisage new plaster would have stains that need blocking.
Answered by: Thompson's Product Expert
Date published: 2017-05-06

I get damp patches/mould on a wall which I believe is caused by condensation. Will this stop the mould developing? Thanks

Asked by: Richard898
Thank you for your enquiry. This product will not address your issue of mould, Thompson's One Coat Damp Seal is designed to cover residual stains caused by mould/damp issues that have been addressed and resolved.
Answered by: Thompson's Product Expert
Date published: 2017-02-07

got damp spots tried plastering but still has come through can i put damp seal on top

Asked by: bucko92
Thanks for your question. If the source of the damp has been eradicated and it is now just the stains coming through then Damp Seal will stop these spoiling any subsequent decoration. If the source of damp is still present Damp Seal won't solve the problem.
Answered by: Thompson's Product Expert
Date published: 2016-10-08

Is 38361 damp seal ok for rising damp

Asked by: wijem
Thanks for your question, no Thompson's Damp Seal would not be a suitable treatment for rising damp, it is a product designed to stop damp stains spoiling subsequent decoration once the damp problem has been resolved.
Answered by: Thompson's Product Expert
Date published: 2016-10-08
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Brand Thompsons
Coating & Finishes Drying Time Dries in 4 Hours
Coating & Finishing Type Matt
Coating Finishing Volume 750 ml
Colour White
Manufacturer Guarantee 1 Year Guarantee
Pack Size 1
Parent Colour White
Pieces in Pack/Case 1
Product Type One Coat Damp Seal

Hazardous - Delivery unavailable for any offshore location.


Safety Data Sheet (COSHH)