Washproof plasters are water-resistant and are ideal for exposed parts of the body like hands which are likely to come into contact with water. They are not designed for submersion in water.
A Guide to Washproof and Waterproof Plasters
A wound that’s in the process of healing is at great risk of infection if it’s not properly cared for. Keeping the wound clean and covered should be a priority, especially while submerged in water, where bacteria can easily cause infection.