I tried 3 different glues. The model we use (mini talon) is made with “EPU” expandend PU.

I tried:

* UHU POR - special glue for Styropor and similar foams. * UHU Plus - 5 min two component epoxy * Hot Glue (Patex)

The results:

Is not compatible with PU. Its neither waterproof, nor does it keep the parts together.

works well. good fixture and waterproof:

But - the glue has to be applied in the right way! It has to be thin and completely dry before putting the parts together:

Bust is to spread it equally with a (gloved) finger:

Hot glue also showed very good results, both for fixure and for waterproofing.