Proper rinsing techniques determine the final look and quality of the job. Rinsing is not required on vertical surfaces; however if sealing is going to be the next step, the surface must be rinsed to remove any chemical residue.Rinsing is required on glass and horizontal surfaces. Pressures that mark the surface should be avoided. When in doubt, follow the manufacturers recommended P.S.I. for the substrates.Do not use a zero-degree nozzle.Caution: Do not allow the product to dry on a surface.