[Expert advice] How to remove PU foam stains?

PU foam stains are easier to remove from smooth surfaces. Removing foam from porous ones is far harder, and the more porous the surface, the smaller the chance of removing the stain without a trace. Uncured and cured foam call for different products.

Removing uncured foam
Uncured PU foam is removed with an aerosol foam & gun cleaner. To flush the inside of the gun, screw the can onto the gun, open the flow control screw fully and run the cleaner through the gun three times for five seconds. To remove uncured foam from the outside of the gun, from can valves, work surfaces and clothing, fit the spray tip onto the valve of the cleaner can, spray the cleaner onto the stains and wipe the remaining foam off with a tissue or a rag.
Note! The working position of the cleaner can is upside down. The product contains solvents that can attack plastics and painted surfaces, so before cleaning such surfaces test how the product acts in an inconspicuous area. Avoid contact with the eyes and other mucous membranes.

Removing cured foam
Cured PU foam has to be removed with the product that is named after the job — a cured foam remover. It also comes in aerosol cans. To clean a surface, first cut away as much of the foam as possible with a knife or remove it mechanically in another way. Then spray the product onto the foam and wait from 10 to 30 minutes until the foam softens. Carefully scrape the softened foam off with a putty knife or wipe it away with a dry clean cloth.
Note! The product contains solvents that can attack plastics and painted surfaces, so before cleaning such surfaces test how the product acts in an inconspicuous area. Avoid contact with the eyes and other mucous membranes.