On 29/08/2020 13:23, Chris Green wrote:
John Towill wrote:
I have a light fitting that on replacing the florescent tubes tow small
pieces of hard plastic broke off rendering the light useless. What
adhesive, if any, would be suitable to glue them back into place please?

It almost entirely depends on the plastic and you may find it rather
difficult to identify unless it has one of those pointy triangle
plastic type markers.

If it's polythene or polypropylene then it's difficult to stick, you
need glue specifically for the plastic and it requires the surfaces to
be 'prepared' with something that treats the surface so the glue
sticks (that's chemically 'prepared' not just roughened).

If you're lucky and it's polystyrene, PVC or ABS then you can stick it
with standard plastic pipe cement or any old 'hard plastic' glue. This
will 'solvent weld' it and give a good strong joint.


Fluorescent end fittings seem to be made from some highly filled plastic
formulated to take the temperature, which then embrittle and fracture.
Not easy to repair. Epoxy is good because you can bulk up the thickness.