NANUK Waterproof Cases IP67 Rated (Submersion at 3ft for 30 min). The waterproofing seal used in all NANUK watertight cases is custom designed to fit our products. The seal is designed to resist deformation and fatigue, ensuring a long lasting watertight seal. Our waterproof cases are ideal for applications such as search and rescue, marine transportation / storage, and diving. Any of our many dealers can easily outfit you with one of our waterproof cases, accessories or other products. NANUK equipment cases and transportation products are complete with a lifetime guarantee in materials and workmanship for the life of our products.