A rubberized asphalt-based mastic. It has excellent adhesion to structural concrete, masonry, glass-mat faced gypsum sheathing and wood and is designed to seal terminations, edges of patches, and overlaps in detail areas. It is an integral part of the Bituthene® Waterproofing System, though it should not be used as a primary waterproofing material. It is compatible with all Perm-A-Barrier® self-adhered air barrier and flashing membranes.
Bituthene Mastic is designed to seal terminations, edges of patches and overlaps in detail areas. On vertical applications, the mastic must be applied to both the top and bottom terminations.