... , granite, sandstone and quartzite. In contrast to ordinary silicone sealants, contact with these construction materials causes no staining of joint edges ... a primer.Restrictions on useHX-5800 may be discolored in contact with some organic elastomers, e.g. EPDM, APTK and ... At least 12 monthsStoragePlease keep the product stored in a cool (below 25°C), dry place in moisture-tight original container ...