Safer and more environmentally conscious, this industrial strength paint and varnish stripper can be used on wood, metal and masonry. It removes modern varnishes and multiple layers in one application. It does not evaporate and stays active for over 24 hrs. It is more efficient than conventional paint stripper. Contains glycol esters and N-methyl-2-pyrrolidone which is biodegradable. We do suggest that very sensitive people are not present while this stripper is used.