Hippo Patch Instant Leak Repair Equipment Sticks & molds to virtually any surface: aluminum, canvas, concrete, fiberglass, glass, leather, metals, nylon, plastics, PVC, vinyl and wood Stops water leaks, rust and corrosion, This multi-purpose waterproof repair material never hardens, cracks, peels or shrinks and can be painted Hippo Patch is not recommended for most inflatables, The air pressure inside an inflatable can often surpass the pressure design of the Hippo Patch Designed for low-pressure applications Effective between -40 Degree &158 Degree (-40 Degree & 70 Degree)