I. Poor Adhesion to the Base Surface

1. The base surface must be thoroughly cleaned.
2. Check the strength of the base surface; it must not be sandy, peeling, or loose.
3. For water-soluble coatings, there must be no standing water on the surface.
4. For solvent-based coatings, the base surface must be completely dry.
5. The first coat must use a primer.

II. Uneven Thickness

1. The base surface must be level and free of holes.
2. The coating must be applied in multiple coats to form the film.
3. Adjust the consistency of the coating according to time and site conditions.

III. Formation of Lumps

1. Do not use expired coatings or coatings that have exceeded their pot life after mixing.
2. Inadequate manual or mechanical mixing of two-component materials; inspect the mixture carefully.
3. Using unclean mixing buckets; ensure proper cleaning of mixing containers.
4. Incorrect mixing ratio; follow the correct proportioning strictly.

IV. Coating Delamination

1. Inadequate cleaning before each coat during the multi-coat application process.
2. The previous waterproof film has not dried completely before the next coat is applied.

V. Film Cracking After Waterproofing Completion

1. The base surface was not properly cleaned and contains a large amount of loose dust.
2. A single coat is applied too thickly, causing uneven moisture evaporation during drying and resulting in cracking.
3. Outdoor construction in adverse weather conditions such as strong winds can easily cause cracking.

1. Remove loose dust from the base before application, treat the surface with a primer, and apply multiple thin coats.
2. Avoid outdoor construction during windy weather.

VI. 'Bean Curd Residue' Phenomenon in Waterproof Coating