Solvent based polyurethane waterproof coating is a single-component, high-solids polyurethane waterproofing membrane suitable for concrete, wood, and masonry. It is ideal for retaining walls, below-grade waterproofing, and tunnels.
1. How to use solvent based polyurethane waterproof coating?
(1) Dry, smooth and clean the base surface
Before construction, the ground must be thoroughly cleaned to remove dust and impurities on the ground. Pay special attention to the cleaning of the roots of water pipes and the position of the drain outlet. The remaining mortar blocks or protrusions should be flattened with a shovel, and then the construction can be carried out.
(2) Coating construction
Generally, three coats of scraping are required. After the first coat of coating has cured for 12-24 hours, apply the second coat of coating in a direction perpendicular to the first coat of coating. If a rigid protective layer is used on the third coat of coating, in order to increase the bonding force between the waterproof layer and the rigid protective layer, clean sand can be sparsely sprinkled on the surface of the coating before it is completely cured. After the coating with sand is cured, the rigid protective construction can be carried out
(3) Additional waterproof layer for details
Apply additional waterproof layer on details such as corners, pipe roots, cracks and deformation joints.
2. Construction skills of solvent based polyurethane waterproof coating
(1) Paint stirring: Before construction, the single component polyurethane waterproofing should be fully stirred to ensure the uniformity and consistency of the coating
(2) Edge treatment: The edges of the waterproof layer and the overlap of the sub-brush should avoid curling. Ensure that the base layer is clean and dry, and operate carefully to maintain a good seal.
(3) Protective coating: During the construction process, the urethane waterproofing coating should be protected intact, and human activities or placement of objects should be avoided before curing to avoid damaging the coating.
By following these detailed steps and precautions, the construction quality and effect of one-component oil-based waterproof coatings can be effectively improved.