Collars H 60-90 are ideal for connecting waterproof membranes with through pipes or roof systems. Thanks to their tapered tang, they facilitate laying and guarantee resistance to weather conditions. Perfect for adhesion with TPO membranes, they retain their elasticity and flexibility even at low temperatures. Collars, H 60-90, are used to connect waterproof roof membranes with any through pipes or installations in the roof. The slightly tapered tang facilitates their installation in through pipes. They have excellent resistance to deterioration caused by the sun, ozone and other atmospheric or chemical agents normally present.