Greengates Builders Merchants

Enviroseal Available From Greengates Builders Merchants Accrington, Lancashire



Enviroseal is an effective water repellent liquid based on a solvent free silicone/­siloxane emulsion for use above ground on porous brickwork, cement renderings, asbestos, cement/­mineral boards, unglazed tiles, cast concrete, roughcast, stonework (including calcareous

materials, i.e. those containing limestone), wood, canvas and leather.

Surfaces treated with Envi­rose­al­re­main permeable to vapour so that moisture within the structure does not remain trapped.

Enviroseal is clear and colourless and will not normally alter the appearance of treated surfaces. In some circum­stances, however, very slight darkening may occur.

The treated masonry surface will not prevent the penetration of water at pressures greater than approx. 1.4kg cm2 (20lbs per square inch).

Depending upon the nature of the surface to be treated and conditions of exposure, two coats of Envi­rose­alcan be effective for at least 10 years.

Note: Enviroseal is NOT a dustproofing sealer or a damp-proofing membrane.


  • Highly penetrating, low odour solvent.
  • May be applied by brush or low pressure spray.
  • Will shed waterborne dirt and reduce surface conta­mina­tion.
  • Improves insulation by keeping surfaces dry.
  • Colourless, and non staining
  • Vapour permeable (allows the surface to breath).
  • Becomes effective immediately after drying (appro­ximately 3 hours).
  • May be overcoated at a later date with decorative paints.
  • Conforms to the performance requirements of BS 6477 :1992 for substrate groups I and II.


Substrates should be prepared by cleaning to remove all surface conta­minants, including fungal/mould growths (e.g.Wykamol Microtech Biocide Data Sheet). Mould release agents or decorative paints should be removed completely.

Structural defects, particularly mortar joints, repointing or rendering must be made good and allowed to cure for at least 1 month before treatment.

Enviroseal will not prevent ingress of water through cracks or defective joints.

If sandblasting / microb­lasting are carried out, ensure that the surface is hosed down with water extremely thoroughly. Repeat twice. Allow to dry. This is to ensure that the pores within the stone are not blocked with sand which may affect the application.

Surfaces must be substan­ti­ally dry before application of Enviroseal, and it is recommended that Treatment is carried out following a period of dry weather.

Nonabsorbent surfaces should be treated.

Where backings are heavily contaminated with salts, there is an increased risk of spalling of surfaces treated with water repellents.

The application of Envirosealis not recommended under these circum­stances. If doubt exists, advice should be sought from The Technical Department of The Wykamol Group.

For More Information on Wykamol Products give us a ring today or call into our Whalley Road Yard.

Greengates Builders Merchants delivering to the whole of Lancashire including: Accrington, Blackburn, Burnley, Clitheroe, Darwen, Great Harwood, Haslingden, Padiham and Pendle.

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