Keep you polycarbonate fixed in one place Secure polycarbonate sheets to timber rafters and reduce the risk of sheet becoming dislodged in windy conditions. Includes foam compression gaskets to stop water ingress and allow a natural expansion and contraction of the multiwall polycarbonate sheet. The compression gaskets also help prevent wind uplift and sheets being pulled out of cappings. Features & Benefits Prevents uplift by wind Allows natural expansion and contraction Protects against water ingress at fixing Complete collar with screw screw cap cover and gasket White Anthracitye Grey or Chocolate Brown for Mahogany and Rosewood uPVC 10mm 16mm or 25mm size Fitting Polycarbonate Sheet Fixing Buttons The following general pointers are offered to help you best fit the Polycarbonate Sheet Fixing Buttons Use a sharp steel drill bit instead of a wood one Drill at least 40mm away from the edge Drill between the ribs Do not overtighten the screw fixing...