It will be part of the original kit in a new greenhouse but if you have inherited an old greenhouse, or your existing greenhouse is old, you will need to replace the original gasket. This gasket is ideal for Halls Greenhouses and also the now discontinued AGL greenhouse range as well as many other greenhouses. This 'n' profile gasket has support flanges for the glass on either side.

It is supplied in individual packs, each 18 metres long.