A plasticising and waterproofing additive for mortar, pebble dashing and external renders. Improves the workability of sand/cement without the addition of lime. Once cured the mix has a much reduced porosity thus extending service life. Reduces suction in layers of render, keeping the topcoat workable for longer.


Form Supplied: Liquid concentrate


Packaging: 5 litres and 25 litres liquid concentrate


Application Rate: 1 part concentrate to 30 parts of gauging water. See technical data sheet if more than one additive is being used


Colour Range: Pink viscous liquid


Contains: Blend of silicate and fatty acid


Shelf Life: 12 months unopened. Store between 5°C and 30°C


Sovereign Waterproofer gives excellent workability to both mortars and renders. Once cured the cement mix will have a much reduced porosity leading to an extended service life. 


When building up layers of render the addition of Sovereign Waterproofer will reduce the suction of the initial coat reducing the likelihood of the top coat cracking due to flash drying. This is particularly useful when pebble dashing as the surface remains “wetter” for longer allowing more time for the aggregate to be placed. 


Waterproofer can be used with other admixtures, e.g. rapid hardeners, but they should always be added separately, not together. The dilution factors should be adjusted where necessary.

Sovereign Waterproofer 5L

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    If you would like to know if we deliver to your area please give us a ring on 01228 525104.


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Who we are

Cumbria Building Supplies ltd

Unit 6

Marconi Road

Burgh Road Industrial Estate




VAT no: 734 7881 00

Reg no: 401 0956


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