Watco Fast Drying Dampguard


Damp-proofs, decorates and resists mould growth, creating an easy to clean surface on damp walls, above or below ground level, and in basements.

  • Resists up to 2 bars of water pressure
  • Fast drying - recoatable in 4 hours
  • Prevents water seepage through cement, masonry, concrete block walls and basement floor slabs

£77.40(ex. VAT)
£92.88 (inc. VAT)
Please choose your colour
Available for Delivery (See Delivery Options Below)


Watco Dampguard is a masonry coating to keep dampness and moisture out of basements, cellars etc. Resists up to 2 bar of water pressure and is also mould resistant.

Applied as two coats, the first coat primes, the second provides a damp proof, wipe clean finish which will resist mildew growth.

Watco Dampguard is applied like a conventional paint, leaving a smooth, white eggshell finish. It can be overcoated after 14 days if desired, but this will reduce its mould resistance.

Quick Links - Click To Jump To Section:

Features & Benefits

  • Areas of use include:
    • Damp walls, above or below ground level
    • Basements
  • Prevents water seepage through cement, masonry, concrete block walls and basement floor slabs
  • Resists up to 2 bar of water pressure - twice the strength of latex waterproofers
  • Fast drying – recoatable in 4 hours
  • Easy to use – can be applied to dry or damp surfaces
  • Oil-based Shellac formulation
  • Provides a decorative and attractive, white, easily cleaned surface

Surface Preparation

Unpainted Masonry – Must be at least 30 days old, clean and free of oil, grease and other contaminants. Remove efflorescence with a stiff bristled brush or with an acid cleaner. Rinse thoroughly. Remove all mould and mildew. The surface may be dry or slightly damp.

Painted Surfaces – The effectiveness of Watco Dampguard on such surfaces depends entirely upon the soundness and waterproofing ability of the existing coating. Remove as much as possible. Clean and abrade any remaining coating. Take special precautions with pre 1960’s paints, since these may contain lead.

Water leaks and cracks should be patched with a suitable hydraulic cement plugging compound and allowed to dry thoroughly before applying Watco Dampguard.


Do not thin. Stir well before use.

Apply two coats by short pile roller or brush, working the first coat well into the surface. Keep to the recommended coverage rates.

Allow the first coat to dry for at least 4 hours before applying the second. Inspect the completed job for pinholes etc and reapply where necessary.

Provide adequate ventilation in areas such as cellars and basements when applying.


For severe situations with high water pressure use Watco Waterproof Coating.

Not recommended for potable water, fish tanks, swimming pools, or as a floor coating to take foot traffic.

Not recommended as a tank lining.

Do not apply over active running water.

Product Details

Data sheet

For Use By
General Use
Interior / Exterior Use
Interior and Exterior
For Use On
For Use On
For Use On
Application Method
Short pile roller or brush.
Pack Size
Rough surfaces: approximately 8m² - 10m² per 5 litres per coat.
Smooth surfaces: first coat 8m² - 10m² per 5 litres, second coat can be extended to approximately 12m² - 14m² per 5 litres.
Recommended Thinner/Cleaner
Use a proprietary paint thinner/ cleaner, low odour white spirit or a similar solvent. Do not use water.
Compatible Primers
None required
Touch Dry
1 hour
UN Number
Dry to Recoat
4 hours
Fully Cured
7 to 14 days
Base Type
Exterior / Interior Use
Exterior & Interior Use
Suitable For Use On
Suitable For Use On
Suitable For Use On
Suitable For Use On
Application Method
Application Method
Product Type
Damp Proof
Minimum Overcoating Time
Do not apply other paint coatings for at least 14 days.
Colour Family

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

Be the first to ask a question about this product!

Question about the product

* Required fields