Cementitious Capillary Crystalline Waterproof Coating Manufacturer China Substrate Preparation Thoroughly clean the concrete substrate, remove laitance, dust, oil stains and loose peeling materials. Repair honeycombs, holes, wide cracks over 0.4mm and damaged areas. Fully wet the substrate to keep it moist, clean and solid. No standing water is allowed. Focus on cleaning and polishing details such as internal and external corners, construction joints and pipe roots. Material