wood to plastic glue

Are you sure this is correct?

I get http://polypropylene/ and then Server not found.

Use silicon and bolt it through the wood and plastic.

Link messed up - try again:

my fault

was my best thought

Doesn't work either, but then photovomit never does.

Its probably using some sort of spyware /tracking that has caused it to be in violation of Natural Philopsohers' Internet Rights.

Looks like it might be polyethylene / polypropylene, in which case conventional glues are not much use. Why do you need to stiffen it? Will you be trying to fix a pipe or duct to it, for example?

Sandwiching with plywood sounds like a good strategy. If you use something like bitumen mastic as the "butter" you will generate a lot of shear strength between the wood and the plastic, and reduce stress concentrations, it will also be tolerant of movements from differential thermal expansion, or from the effect of water on the plywood. No more nails sets to a rigid, brittle product.

I think that would work too.

I have checked link it is working OK

I want to stiffen the lid as in needs to support a cyclone unit .... which is about 320mm tall .. onto which the pipes will attach .. as this means quite a leverage on the lid wanted to stiffen it.

Anyway did the job yesterday .... made up 2 x plywood collars (like large polo mints) and sandwiched the lid between these with 5 x M4 bolts .. and put a nice coating of silicone on both wood to plastic faces ... all pretty stiff now - without being brittle.

Trying to glue wood to polypropylene was not going to be successful.

You didn't say it was ployprop. That's almost as bad as nylon or polythene

Didn't know initially .. had details today Anyway done now with Silicone