Water seepage through cracks -Water seepage of window sill -Water seepage in toilet -Wall water seepage -Roof seepage -Water seepage of external wall Material: liquid. Clean the base surface before construction to ensure that the base surface is dry and free from dirt. Wait for the product to penetrate into the base course. After a few minutes, when there is no liquid on the surface, spray twice or three times to enhance the effect. The waterproof layer can be formed after curing for 24- 48 hours, and the waterproof layer will be stronger with the time delay.