Solvent cements are mixtures of solvents (chemicals) and plastic resins used to weld (join) plastic pipe and fitting. The solvents penetrate (attack) the surfaces of the pipe and fitting, causing them to soften and swell. The swelling of the pipe and fitting continues until the gaps between the two are closed. Resin fills any gaps that remain open. Solvents a liquid and they evaporate. As the solvents evaporate, the pipe and fitting cure into a single piece of plastic. Solvent cements are not glue and wild only join (weld) plastic pipe to each other. Each bottle is available in 200ml.