648 250mL is a product of Henkel, a German consumer goods company. It is a polyurethane adhesive sealant that is one-component and moisture curing. It is a multi-use adhesive ideal for interior and exterior use on a variety of materials and substrates such as glass, metal, wood, masonry, plastics, and fabric. This product is an all-round adhesive that is highly flexible, provides multi-directional strength and gives an aesthetically pleasing finish after application. It can be easily applied manually or with an air or airless spray or by a professional caulking gun. It is resistant to low temperatures and is paintable after about 2 weeks. This product has a long life expectancy, and is resistant to grease, water and many common solvents.