Kop-R-Lastic 300mL Black Thermoplastic Sealant is a one-part, high-performance synthetic rubber sealant, which is quick drying and flexible. It exhibits excellent adhesion to a variety of construction materials including metal, aluminum, concrete, masonry, wood, PVC/vinyl, glass, and more.

It is used as a termination sealant in both vertical or horizontal joints – in both exposed and concealed applications. It is ideal for use in masonry joints, metal flashing, glazing, and window and door applications. Kop-R-Lastic can also be used as a termination sealant in conjunction with Henry® BlueskinVP® 100 and 160 self-adhered water resistive air barrier membranes.