MICROPRIMER is a one component, low viscosity, 100% aliphatic polyurethane-based primer suitable for all substrates. It is characterised by its very low viscosity, excellent impregnation, non-yellowing (non-staining) properties combined with a relatively fast cure speed and most importantly its excellent adhesion on both non-porous and porous substrates. The cured film shows good mechanical properties: Its elongation is >50%, and its tensile strength surpasses 40 N/mm2. Apply with brush or roller. Consumption: 50-200 gr/m2, subject to substrate porosity.
To be used as primer for:
Also, for use as concrete sealer.
100% Aliphatic Polyurethane; No yellowing, No staining
Before vulcanization | Appearance | Achromatic transparent |
---|---|---|
Viscosity (Brookfield), cP | 20 | |
Specific weight, gr/cm3 | 0.9-0.95 | |
After vulcanization | ||
Tensile strength at Kg/cm2 break at 23 oC (N/mm2) |
400 (40) | |
Elongation at 23 oC, % | >50 | |
Dry to touch on DRY cement, hours |
6 |
|
Application of main membrane, hours |
12-24 | |
Adhesion to cement, mPa | >4 |
Clean the surface using a high pressure washer, if possible. Remove oil, grease and wax contaminants. Cement laitance, loose particles, mould release agents, cured membranes must also be removed. On non porous surfaces use HCl acid or/and Viacal. Apply with brush or roller depending on the surface to be primed at a consumption of 50-200 gr/m2. Ensure primer has cured before applying main membrane/sealant.
Can be kept for 12 months minimum in the original unopened pails in dry places and at temperatures of 5-25oC. Once opened, use as soon as possible.
Contains volatile flammable solvents. Apply in well-ventilated, no smoking areas, away from naked flames. In closed spaces use ventilators and carbon active masks. Keep in mind that solvents are heavier than air so they creep on the floor.