25% aluminum astringent solution based on aluminum chloride. Indicated in gingival retraction for in-situ yarn impregnation and bloody gum serum gemis. It has a remarkable astringent power and therefore guarantees a good local haemostasis and a contraction of the more superficial layers of the gum, it allows for retraction of the rapid gingival tissue, is compatible with all non-medicated retracting wires.