How to construct clean polyethylene polypropylene waterproof material.
Clean up the dust and debris on the surface of the base, remove the residual mortar and protruding part of the surface, and do not empty drum, cracking, sand and peeling phenomenon. The surface should be kept dry, the moisture content is not more than 9%, and it should be smooth and firm. The base part is made uniform and consistent with the negative Angle connected with the deformation joint or pipeline, etc., with a flat and smooth folding Angle or arc. The pipe part of the base and casing at the drainage outlet, downpour bucket, etc., is not less than 20mm above the base surface.
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