Krud Kutter Caulk Remover is specially formulated to help break up tough caulk and sealants and make them easier to remove from surfaces. Thick gel clings to applied areas to break down a variety of sealants, including silicone, acrylic latex and polyurethane. Biodegradable formula contains low VOCs, making it appropriate for use in enclosed areas like tubs and showers, and can be used on a wide range of both interior and exterior surfaces. Not recommended for use on painted or varnished items.