This is the clear cap version of TIMCO’s corrugated sheet fixing. It does the same job as the black one, screwing plastic corrugated sheets down to timber purlins with a hinged cap that snaps shut to seal out water. The clear cap suits clear and translucent roofing sheets, so the fixings blend in on a lean-to or canopy rather than dotting the roof with black. Fix through the crown of the corrugation.