I dropped something on a polynuc roof which is in danger of splitting into two. Has anyone glued up polyhives before - what brand/type of adhesive works well?
Polystyrene cove adhesive - non solvent type worked for me but I would suggest a coat of paint once cured .
Toolstation, b&q etc
But if the damage is severe I would look at some mechanical bracing too.
How much is a new lid?
You would get the old one for a project then