Azek Building Products. In an exclusive partnership, the HIDfast hidden deck fastening system will be sold through Azek. The HIDfast collated air-driven hidden deck fastener system, works similar to hardwood floor installation. Using stainless steel fasteners and built-in spacers, the system installs fasteners through the edge of the decking and down to the joist at an angle for a secure, screw-free decking surface. The fasteners are available in 21/2- or 3-inch lengths, ideal for use with Azek Deck. The maker says the system can fasten 100 square feet of decking in as little as 10 minutes. 877.275.2935.