Germolene New Skin protects skin damage such as cuts, grazes and blisters, so allowing natural healing to take place. It rapidly forms a tough, almost invisible barrier which makes unsightly plasters unnecessary. What is Germolene Liquid Plaster? Germolene Liquid Plaster is a liquid that can be used to protect cuts and superficial wounds while they heal. It provides a tough waterproof and germproof barrier over a wound.