Abstract: An easily removable coating or paint which is a formulation of acrylic acid polymers and a urethane polymer preferably two acrylic acid polymers are used, one with a relatively high acid number and hardness temperature (glass transition) (Tg) and the other with a lower acid number and hardness temperature (Tg). This removable paint is applied to a surface by roller, screen printing, spraying or brushing and can be removed by a remover which is basically an alkali material with a surfactant. The remover needs to be agitated and allowed to set for a few minutes and then washed away with water. Ammonium hydroxide with surfactant and acrylic thickeners in water is one remover. Another remover is a combination of more than one alkalis, solvent, surfactants and thickeners.

Abstract: A removable adhesive of a combination of acrylic and urethane polymers is provided for securing, among other things, a transfer image to a hard surface. A removable top coat is provided. A top coat comprising a cellulose acetate butyrate alcohol and a diacetone alcohol is provided. A remover for removing the transferred image is provided which is a combination of tetrahydrofuryl alcohol and a dibasic ester and a surfactant.

Abstract: A pipeline is covered with a continuous wrapping sheet having heat-activatable adhesive on its inner side. The wrapping may be helically applied or may be heat shrunk to impart a circumferential stress conforming the wrapping tightly to the surface of the pipe. High frequency induction heating is applied to cause the adhesive to wet and bond to the pipe surface. The wrapping can be applied progressively and continuously along a pipeline excavated from the ground while the pipeline is in service. The product conveyed within the pipe assists in rapidly cooling the adhesive and wrapping sheet so that the pipe can be promptly relaid in the ground.