Renderpel is supplied as a liquid in 1 litre, 5 litre and 25 litre containers.
Renderpel is an integral waterproofer/salt inhibitor additive which is designed to be added to cement/sand mixes to be used for replastering following the insertion of a remedial damp-proof course e.g Dryzone.
Correct re-plastering is of the utmost importance. Even though the damp-proof course is effective, hygroscopic salts introduced by rising damp may cause moisture to be attracted to the wall. This causes further dampness and decorative spoiling, giving the impression that the damp-proof course has not been successful. It is for this reason that re-plastering following the installation of a remedial damp-proof course must perform two functions:
- It must prevent the passage of residual moisture reaching the decorative surface during the drying process.
- It must prevent the passage of hygroscopic salts from the underlying masonry to the new decorative surface in order to prevent further spoiling.
When used as an additive to a 3:1 sand-cement render, Renderpel will fulfil these requirements provided that the specification is strictly adhered to.
Renderpel is a liquid mixture of assorted fatty acids and inorganic materials which is added to the gauging water. When gauged with sand/cement mixes it provides water resistance to the mix thereby resisting the passage of residual moisture and soluble salts from passing to the surface via damp, salt contaminated underlying masonry. However, it still allows the underlying masonry to 'breathe' thereby facilitating the drying processes.