I would just like to say thanks to the Forum for the information I was given about Sikaflex for sealing the edges of the lockers I was putting in my 1990 Puck.

I am currently modifying my workshop and putting some second-hand upvc window units in. They are not in a frame, but the two outside ones are the opening windows, so have their own 'frame' I am cutting a box shape out of the cladding to insert the window into. I intend to use Sikaflex black to seal/waterproof the sides to stop the rain coming in. { the shed is painted ebony black }