White galvanized screws with 1/4" hex head secures covering to greenhouse frame. No pilot hole required. Soft EPDM (Ethylene Propylene Diene Monomer) rubber washers seal out moisture. Use 1" self-tapping screws for attaching Solexx to a metal greenhouse frame.
Rated 3000 hours in accordance to the ASTM B117 Salt Spray Test!
Screws are extremely durable and hold up in harsh outdoor environments. They are painted underneath the head as well to ensure maximum protection.
A standard hardware screw is only rated 60-80 hours.