"Franz Heymann" wrote in message ...
I am mean that lightweight double-skinned stuff which can be cut with
a pocket knife. It has an overall thickness of about 5 or 6 mm. It
is translucent, but not transparent.
Which urgler would like to report on its usefulness for making
"rectangular cloches", or small portable frames?
What does one use for gluing two pieces together?

Plain single sheet polycarbonate can be bent like steel, and drilled
and bolted to make a box or ridgetop shape.

the box section stuff would have to be mitred and glued, ordinary
contact adhesive might do the job for a while, or specialist stuff
like:
Evo-Tech TU1908, or Extru-Fix. Or you could make a lightweight wooden
frame and screw the polycarbonate to it.

I'm not sure about translucent frames being good enough for forcing
plants at the start of the year.