BASF MasterProtect H 185, formerly Enviroseal PBT, is a high-performance, breathable, water-based, patented silane/siloxane blended water-repellent sealer for split-faced, lightweight concrete block and porous concrete surfaces. H 185 is formulated to provide long-term protection for even the most challenging substrates. MasterProtect H 185 extends building life with its excellent water repellency by guarding against moisture invasion. This product is VOC compliant for EPA and most regional jurisdictions. H 185 is transparent and non-staining which will not affect the surface's appearance. Note, however, that H 185 appears milky white out of the pail but dries clear. Water beads appear after the appllication dries which ensures that the substrate is protected against rainfall. BASF H 185 is breathable which means interior moisture is able to escape without damaging sealer. Application is easy whether, vertical, interior, exterior or above grade.