Permanon PS Universal Cleaning Paste 125 g PSPaste removes virtually any stubborn organic stain without any abrasives or harsh solvents Universal cleaning paste removes persistent contaminations without damaging the surface. This product is best suited for effective thorough cleaning and is capable of decomposing back into natural components. PSPaste is almost pH neutral when applied and is non-abrasive. Non-toxic, non-flammable, solvent-free and completely biodegradable.