"Un-Du (registered trademark), the award winning acid -free ""all in one"" patented removal system safely removes all mounting adhesives such as ATG tapes, Spray Mount Adhesives, heat activated foamboards and more. Also removes pesky stickers, tapes and labels. Additionally Un-Du works well on stains, candle wax, goo, tar, tree sap, scuff marks and much much more. No staining or residue left behind. Acid free and Photo safe, removes fingerprints from front of photos."