Glue

not easy to find plastic free. Heres an introduction to some of the greener glues

And BostiK seems to be natural rubber in solvents.

A new tin of Bostik 3851 natural rubber adhesive glue. It can be used for bonding natural rubber and latex sheeting to each other and to porous surfaces such as leather, canvas etc. Volume: 250

EVO-STIK 3851
BOSTIK 3851
CONTACT ADHESIVE
NATURAL RUBBER CONTACT ADHESIVE
Bostik 3851 Adhesive is a translucent grey, natural rubber solution in petroleum solvents.

Recommended Use:
Bostik 3851 Adhesive is used for bonding natural rubber and latex sheeting to each other and to porous surfaces such as leather, canvas etc.

Bonding Instructions:
Ensure rubber surfaces are thoroughly clean and dry, abrading the surfaces if possible. Leather surfaces should also be abraded if necessary

Apply Bostik 3851 Adhesive by brush to both surfaces to be joined and allow the adhesive to become touch dry (approximately 10 - 20 minutes) before bonding the surfaces together under pressure

read more here

Some see our other glue posts HERE

Rubber

Nitrile rubber is synthetic rubber. it can be used to bond cork to make a flexible sheet
like Klinger NI27 Rubber Bonded Cork
Klinger rubber bonded cork is bonded with synthetic rubber, it provides the compressibility of cork with the resilience of rubber. This material has high mechanical strength.
Manufactured from high quality cork oak bonded with synthetic rubber
High mechanical strength and high compressability.
See it here

Cork & Rubber

Rubber cork sheets are made from cork aggregate and different rubber mixes, neoprene, silicone and polyurethane. The final product is incredibly elastic, durable and resistant against grease, oil, fuels, gases and many other chemical substances. It is used as a seal material for cars, agricultural machines and industry seals. Read more.

But you can get expanded cork boards that don’t use synthetic binders.
Expanded insulation cork sheets are natural, balanced and unbeatable cork products that, with this special type of agglomerated cork, do not contain polyurethane or any other fillers or additives. Due to the high temperature processing treatment it expands (similarly to popcorn) and suberin that is releases during is a natural adhesive that binds the expanding grains. This way we produce a wonderful, natural and sustainable material that offers a perfect vibroisolation, thermal insulation and acoustic isolation.
Find them here.

Heres some more information on expanded cork

and this about using cork in the green home.

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