1. If the IBC storage tank is placed outside unprotected, the ultraviolet rays will damage the IBC storage tank and its contents. Our black UV cover is used for 1000 liter IBC rainwater tank, which can protect your water tank from harmful UV rays. 2. Unlimited use: Using the notch, the so-called lid flap, even the covered IBC water tank can be fully used without removing the film. 3. Special features: the IBC adapter is made of 210d fabric. The protective cover is also durable and waterproof. 4. No formation of algae: with the help of the protective cover of the IBC storage tank, the formation of algae in the storage tank is slower. 5. Our cover Fits for 1000L tank (approx 116 x 100 x 120cm / 45.67 x 39.37 x47.24 inch) If your water tank is not the conventional size, please contact us and indicate your size, we'll customize it for you.