Rendermix Plastering Additive

Waterproof render - A concentrated additive which when diluted and mixed with sand and cement renders, and concrete, gives the mix salt and water resistance.

Due to the effects of rising damp, it's possible for walls to contaminated with high levels of salts. If these salts are hygroscopic it could give rise to further damp patches appearing, especially where humidity is high.

Rendermix is a concentrated liquid waterproofing and plasticising admixture, which is diluted 1 part to 40 parts of clean
water, by volume (0.6 litres of concentrate added to 24.4 litres water making 25 litres of gauging solution). It is widely used in
plasterwork after the installation of a chemical dpc.

• Improves the workability of renders
• Waterproof Render
• Inexpensive

When masonry is unstable it must be made good prior to the application of the render. Where a good bond with the wall is
unobtainable expanded metal lath fixed to the wall surface should be used.
Renders and plasterwork should not be left in contact with the finished floor to prevent damp being transferred by bridging of
the dpc.
Redecoration should be delayed for as long as possible to allow the substrate to dry. Re-plastering Paint may be applied
after seven days. Re-papering should be delayed for at least six months.
Condensation is a risk during the drying out period. The provision of adequate background heating and ventilation during the
drying out period is recommended.