Hydro Fix Blood is a washable artificial blood paste in tubes. Hydro Fix Blood dries on the skin and is outstanding for creation of a wide variety of wound simulations. Hydro Fix Blood is applied directly from the tube onto the desired area of the skin, and can be formed as required by a small modeling spatula. The dark color shade of Hydro Fix Blood makes it effective in creating wounds with a scab. The preparation can be completely removed from the skin with soap and warm water..