Overcome:
Use waterproof paints for treatment. First remove shavings or powder with a hard brush, then use chemicals to clean and moss mold of paint manufacturers to clean the area to be absorbed.
Use mortar to fill holes and cracks as large as Quicseal 510, to smooth the surface with a special plaster for outdoor walls such as Quicseal 103. For best results, ensure that the surface to be painted is clean. , dry and wall moisture below 16%. After preparing the surface is coated with an alkali paint, wait for paint to dry and then covered with 1-2 paint waterproofing up Quicseal 124.