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Watco Masonry Waterproofer

A highly penetrating and breathable waterproofer for exterior masonry

  • Waterproofs brick, stone and concrete
  • Easy to apply, white cream which dries clear
  • 20-30 year life expectancy
  • Waterproofs, hardens, dustproof and protects

Frequently bought together


Watco Masonry Waterproofer is easier to apply and penetrates much deeper than traditional liquid systems. It can penetrate brickwork by up to 12mm, giving better protection against wind driven rain. It does not block pores, but lines them with silanes and siloxanes which repel water but still allow the substrate to breathe. 


  • Easy to use cream formula - can be applied by roller
  • Penetrates more deeply than conventional water repellents
  • Improves thermal efficiency on cold and damp buildings
  • Highly resistant to UV light and has a life expectancy of 20-30 years
  • Turns clear in as little as an hour and is effective after 24-48 hours
Suitable for Porous, unpainted surfaces only including concrete brick and masonry
Finish Clear
Interior or Exterior Exterior
Composition Single pack, silane siloxane emulsion
Coverage 25m² per 5L
Number of coats 1
Curing time 2 hours at 15°C
Minimum application temperature 10°C

Surface preparation

Surfaces must be clean, dry and sufficiently porous to allow Watco Masonry Waterproofer to penetrate. Remove all surface growths by wire brushing. Seal any cracks or joints. Do not use detergents to prepare the surface.


If appearance is critical we recommend the application of a small trial area first.

Apply by roller, then use a brush to treat areas close to window frames etc. Any splashes on paintwork or glass should be wiped off within a few minutes. Any areas that were not reached by the roller (such as deep mortar beds or voids in brickwork) should be treated by brush.

Data sheets

Safety data sheets

Safety Data Sheet

Technical data sheets

Technical Data Sheet
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£131.80 (Ex VAT)

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Tools and accessories

Paint Brush

Paint Brush

Professional paint brushes suitable for all coatings

From £2.40  (Ex VAT)

Wire Brush & Scraper

Wire Brush & Scraper

A useful tool for removing rust and old coatings

£2.70  (Ex VAT)

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12" Roller Frame & Handle

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From £8.50  (Ex VAT)

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