A constant hazard with instant Greenhouses is degradation and corrosion of the frame. A Rhino Greenhouse prevents this by making all carriage nuts and bolts from stainless steel, making sure that the bolts won’t rust from exposure or suffer stress fractures due to wind or snow pressure for the lifetime of your product. All components of the Rhino Shelter frame are made from galvanized steel tubing. Unlike many other instant Greenhouse frames that use cheaper recycled steel that has been powder-coated to appear galvanized, Rhino Greenhouse’s use only true hot-dipped galvanized steel. For even greater protection, our tubing has two extra layers on the outside, including a clear protective coating, as well as a corrosion-resistant coating on the inside of the tubes. Rhino Greenhouse covers are made of heavy-duty 10-ounce rip-stop polyvinyl fabric with extra UV-resistant treatment and fire-retardant chemicals. The rip-stop poly fabric is hard to tear, and due to the way that it is woven, even if you get a tear it will not spread. Our high-quality, UV-resistant fabric will last 7 to 10 years in direct sunlight.