500 mL PU Foam Cleaner to clean the PU foam application valves and dispenser gun shafts. Removes uncured residues and spots of foam from various substrates and equipment. Spray directly onto the fresh foam, leave for a few minutes and wipe with a clean cloth. ProLine POWERSEALâ„¢ Insulating polyurethane foam cleaner is used to clean and remove fresh uncured polyurethane foam residues from the equipment after use. It can also be used to remove fresh uncured foam from other surfaces and to clean and remove grease from contaminated substrates.