Salt Retarding Additive to Render
A water based solution of sodium orate which is mixed with sand / cement and used in a repair situation, usually in
conjunction with a Westox 50 Chemical Injection Dampproof Course System or restoring plaster affected by lateral
As a controlled waterproofing additive to ensure that residual hygroscopic salts are discouraged from moving to the
new surface during the drying out of the walls after the installation of a Westox 50 Chemical Injection Dampproof
Course thus preventing secondary dampness problems.
Specific Gravity approximately 1.2
Leave walls approximately 2 – 7 days to allow for evaporation of solution after installation of the Westox 50
Chemical Injection Dampproof Course. Walls are to be sound and wetted thoroughly eliminating excessive suction
prior to application of render coat.
Material should be machine mixed for consistency.
- Three (3) parts sand
- One (1) part cement (Type GP)
- One (1) part Westox Salt Retarder to forty
- (40) parts water.
Eg 500mls to 20 Litres water.
As a 10mm backing render to walls. If a cement render finish is required, apply Westox Salt Retarder mix (minimum 10mm) and scratch the surface to provide a mechanical key, after initial set of cement is reached,
(approximately 2-4 hours) apply normal render mix (using type GP cement only) and finish in usual manner. If hard
plaster finish to be used, apply after salt retarding render coat has been allowed to set overnight.
Do not add lime, plasticisers or plastermaster to Salt Retarder mix.
All render or cement finishes applied to walls after the treatment of Westox 50 Chemical Injection Dampproof
Course System are to have Westox Salt Retarder added to the mix prior to application. It shall be used in strict
accordance with Westlegate Pty Limited printed instructions. Should high salt levels be present desalination is
recommended prior to replastering. See Westox Cocoon Data Sheet.
Wash all equipment with fresh water immediately after use.
5 Litre, 20 Litre.
Refer to Westlegate Pty Ltd Material Safety Data Sheet (MSDS) for instructions