Seal Board 90/135° Internal Mitre Joint White

One end is designed to join window boards at 90° right-angle pointing out of the room, whilst the other at 135° can be used to join between 120° and 150°. Available in a choice of colours and with a foiled finish to perfectly match your window board, these maintenance-free joints are easy to install, are heat and moisture resistant and made to the highest British Standard quality.