Unfortunately we cannot add Penetron Admix to plaster or screed mixes to make it waterproof as it is limited to the use in reinforced concrete structures.
The primary reasons for this limitation in their application are:
1. Calcium (cement) content of the substrate
2. Relative Density of the substrate
1: Calcium Content
The Penetron crystalline range relies on its primary water and calcium reaction for the formation of the crystals. Thus the products efficiency is directly related to the calcium content within the concrete mix and is therefor limited to structural concrete naturally having a much higher cement (calcium) content. For these reasons the product will typically not be effective in a plaster or a screed mix, because the cement content in these materials are too low and does not supply sufficient minerals for the reaction to take place.
2: Relative Density
The crystallisation/densification process is heavily reliant on the capillary “design” or relative density of the substrate. The crystalline products are therefor limited because the relative density of plaster and screed is simply too low to sustain the crystal growth, the material itself is too porous and near impossible to crystallise because of the amount of air pockets or voids formed within the substrate. The material itself cannot accommodate the crystallisation process.