What effect does coalescent have on the water resistance of NEOCAR 850 Clear Sealer?
The effect of varying either or both type and level of coalescing solvent on the water resistance of the NEOCAR 850 Clear Sealer for Masonry Formulation Suggestion E-2528 was tested. The substrate used was smooth cement blocks. Sealers were made following Formulation Suggestion E-2528. The only variation from this formulation was the type of coalescent, UCAR Filmer IBT or Butyl CARBITOL™; and the coalescent level, 10%, 15%, and 20% based on resin solids. One coat was applied by brush to the cement blocks and allowed to cure overnight. Water resistance was tested by placing cotton pads saturated with water on the surface of the sealers. The test duration was four hours. Water penetration into the cement causes darkening of the cement surface.
