Removal Efflorescence and salts from Masonry in preparation of Cementitious Waterproofing
Waterproofing Using Maxseal and Maxseal Flex to a masonry substrate
Removal of Efflorescence and salts from masonry is usually carried out by pressure wash then followed by 10% hydrochloric acid in water applied by brush or low pressure spray and then washed off by hose. The problem with this approach is that sometimes the acid treatment creates further efflorescence and salt formation on certain surfaces. Often where there is hydrostatic pressure or ground water present salts & efflorescence can be present on the wall preventing adhesion of Drizoro Maxseal product. Maxseal & Maxseal Foundation can be used where this is not a problem
Method Prepare area to be treated by removing any surface efflorescence and loose materials. If required use –POWER CLEAN
1. Apply Efflorescence-Rid per instructions.
2. Apply SEALTIGHT to the dry to damp substrate.
3. Allow the SEALTIGHT to saturate.
4. Apply MAXSEAL FLEX to the wet surface as per Technical Bulletin.
Preparation of the surface:
Remove excessive build-up of efflorescence Remove all loose material.
APPLY using low pressure spray ensuring a uniform and homogeneous coverage.
Foam appears when efflorescence is present. Apply until “FOAM” begins to appear.
Wait 5-8 minutes, mechanically agitate and re-apply as required, use zero pressure washer/rinse to remove efflorescence.
Continue to apply –Efflorescence-Rid to areas where foam appears and until foam no longer forms.
Rinse area thoroughly with water.
APPLY –SEALTIGHT to prevent further salt formation