Descrição
For attaching EVA foam pieces together, I usually use contact cement. If the foam pieces are tiny, I'll use super glue (cyanoacrylate) which has to be held in place for a few seconds.
Here's the whole dwarven helmet build:
https://youtu.be/AlTXdMGofGM
Free patterns:
https://www.punishedprops.com/free-blueprint-files/
Foamsmith Helmet Tutorial Book
https://www.punishedprops.com/shop/foamsmith-3-helmets-print-book/