It is normal that if coated with GRASi products for a period of time or long time rinse will not appear surface hold water.Because of dust or contaminants accumulated on the substrate surface,the surface tension changes, it seems that surface can not hold water, this does not affect the penetration protection layer on the substrate. GRASi products has strong penetration into inner layer.

Water beading is not equal to waterproof effect,for example, GRASi wp1319, it has excellent anti acid rain and anti chloride, but contact angle is general.