1.Neutral curing ; 2.Excellent weatherability and long life span; 3.Waterproof jointing sealing for door, window with wall. Description:BLD620 is single component, neutral solidification, good adhesion to the materials as aluminum panel, aluminum-plastic composite panel; no corrosion to metals, coated glass, concrete and marble; excellent weatherability to resist ultraviolet (UV) rays, ozone and ...