Paste coating method

1. Remove efflorescence, old paint films, and putty layers from affected and surrounding areas within a radius of 10-30cm.
2. Utilize a blow dryer to accelerate the evaporation and drying process.
3. Apply a 1mm thick wet film of concrete reverse osmosis plugging agent. Allow a 24-hour period of thorough penetration and absorption of the plugging agent, then cover, level, and smoothen with putty. After a suitable drying time, apply cement paint as a finish.