The disclosure teaches a polyurea coated water storage floatation cover comprising a layer of buoyant closed cell foam coated with polyurea, a upper layer of polyurea coated textile attached to the buoyant closed cell foam coated with polyurea, and attachment components affixed to the upper layer of the polyurea coated textile. The cover can be rolled up for storage and transportation. The cover can be reused. The cover can be made in sections that can be attached together to cover a large area of water surface such as in a retention pond or open top tank.