Alukap XR 60mm Wall Bar Incl Gasket, Fixings & Endcap COLOUR:Brown our Alukap® Slimline glazing bars as well as bespoke our Alukap® Slimline glazing bars are compatible with any purlin material and suitable for polycarbonate and glass roofs It’s unique design uses innovative gaskets to seal down onto the sheets and provide a flat edge to seal to the wall Supplied with multi fin gasket systems which are combined with the variable pressure fixing screws this Alukap XR 60mm Glazing Bar System provides a leak proof long lasting roof glazing solution which is why the Alukap XR system has no instances leaks despite accommodating roof pitches from zero degrees pitch to totally vertical