Polyurethane sticks to hair and forms a hard shell. It’s best to wash the polyurethane out of your hair before it dries because after it dries, it may take several washes to remove. Mineral oil loosens the polyurethane from your hair. The type of polyurethane most likely to get in hair is the type used for home improvement projects, mainly wood refinishing. You can remove polyurethane from your hair and from your skin and scalp as well.
Wet your hair with water. It needs to be soaking wet, so the shower is the easiest place to wet it.
Pour 1 tbsp. of mineral oil in your hands. Set your hands on top of the polyurethane spot in your hair. Use your fingers to work the mineral oil into the polyurethane.
Comb the mineral oil through your hair with a fine-tooth comb to help separate hair that is stuck together and to break up the polyurethane. A fine-tooth comb divides the hair into smaller sections than a wide-tooth comb.
Use your hands to scrub at the polyurethane by rubbing the hair between your fingertips.
Use your nails to grip the polyurethane closest to the root of your hair. Slowly pull down to pull the loosened polyurethane off the hair. Pull it to the ends of your hair.
Rinse your hair with any temperature of water.
Repeat the entire process as necessary.
Wash your hair with regular shampoo if desired.