NovaFlex Silicone Metal Roof Sealant is the ideal solution for attaching your Pipe Flashing or other materials to your metal roof. When combined with Metal Roofing Screws, you can create a tight, secure connection that will withstand drastic swings in temperatures without failing. This silicone sealant comes in a 10oz. tube, and is permanently flexible and resistant to moisture, mold, mildew and UV light. The seal will not freeze, shrink, crack or have any negative changes to compromise the seal. Once dispensed, the silicone becomes tack-free in 10 minutes, fully cured in 48 hours, and can be gunned in any temperature.