What if the exterior paint is long?

China Paint Online News Information: Exterior paint long spots or weathering refers to the phenomenon of hard white salty substances when water seeps out of mortar or masonry. So what about the long spots or weathering of the exterior paint?may be due to long patches of exterior paint: inadequate surface pretreatture, no weathering other than the original on the clean surface;Exterior paint long spot solution step:If excessive moisture is the main cause, eliminate the source of moisture by repairing roofs, cleaning drains and falling pipes, and sealing cracks in masonry with high-quality water-based pure acrylic or silicone propylene fillers.if moisture comes from inside the building, especially in the kitchen, bathroom and laundry areas, consider installing ventilation or exhaust fans.remove the weathering and all other loose material with a wire brush, electric brush or power cleaning equipment, and then rinse the surface thoroughly with water.to be dried, apply high-quality water-based or solvent-based masonry-enclosed paint or primer and let it dry completely, then apply a high-quality exterior paint, masonry paint, or elastic wall paint.