HD - Concrete Hardener & Densifier - Sodium Silicates Based - 5 Litres
HD - Concrete Densifier & Hardener - 5.0 Litres
Cemcraft HD hardens concrete surfaces, prevents penetration of persistent marks and protects against oils and greases. It is designed for surfaces which will be machine polished. However, it is not a substitute for a high-density concrete mixture which should ALWAYS be used for these applications, rather HD works to further enhance the benefits of this type of mixture. It WILL give you a more stain resistant and denser concrete which will polish to a better finish. You WILL need to use other products to complete the finishing process - HD does not replace concrete water reducing plasticisers, sealers and waxes.
Cemcraft HD soaks into the concrete and has two effects:
Strengthening of the crystalline structure of concrete, owing to the development of very hard mineral compounds after HD has reacted with the free basic elements of the material.
Decrease in permeability, owing to the penetration of a polymer resin into the free interstices of the material.
Cemcraft HD is ready to use and can be applied with a paintbrush, a paint roller, a brush or by spraying.
HD is a soaking product. It must be applied in such a way that it does not remain at the surface (pool, etc.) and penetrates into the material, in order to harden the surface.
During the polishing process we have had great success densifying after the 80-grit diamond and then moving on to the next sequence of grits. On medium-hard to hard, high-density concrete, we typically densify around the 200 to 400-grit range. When it comes time to applying densifier to concrete that will be stained, the timing differs. With acid stain, it’s best to apply densifier after the acid stain has been applied, rinsed off, and neutralized because the densifier creates a more impermeable substrate that could inhibit the penetration and reaction of the stain.
Non-acid stains, on the other hand, can be applied after you have densified because they are 100% soluble and penetrate readily. In addition, nonacid stains do not rely on a chemical reaction like acid stains do.
If needed, Cemcraft HD can be diluted with water (10 to 20%) in order to enhance its penetration. Coverage will depend on concrete's porosity, one litre should cover between 5 to 10m2.
PLEASE NOTE: Cemcraft HD SHOULD NOT be applied on concrete that has been hardening for LESS than 7 days.
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