Contact adhesives have a high initial strength. They are based on polymers that have the ability to bond to themselves as a dry adhesive. Both the surfaces to be bonded must have the adhesive applied and be allowed to dry. The coated surfaces bond immediately on contact so care needs to be taken since re-positioning is near on impossible. The high initial strength of contact adhesives makes them ideal for a variety of applications. Because the adhesive is dried before bonding, they can be used to bond very large surface areas. Contact adhesives contain flammable solvent, proper care must be taken for safe handling.