BCB shark repellent contains a chemical and a thick black dye that repels and disorientates sharks. When tested by the US Navy BCB’s shark repellent was the only product out of 24 to achieve any success in repelling sharks. Since then BCB’s shark repellent has been used by Navies worldwide as their approved shark repellent.
When this foil packed sachet is squeezed in water, the crystalline acetate produces a dense black cloud. The inner bag has an attachment cord so it can be kept close to your body. This NATO approved product is used in life rafts and for airborne survival packs.