This closed cell rubber is made from EPDM material. Use it for any outdoor sealing or gasket needs you may have.
EPDM Neoprene Sponge Rubber - The Rubber Company
Open Cell EPDM vs Closed Cell EPDM
Artilife Closed Cell Sponge Foam Sheet Roll, 1/4 T x 17 W x 80 L, Perfect Cosplay Padding, DIY Project Sheet - Easy Cut Non-Adhesive
Rubber-Cal Closed Cell Sponge Rubber Blend 1/2 in. x 39 in. x 78
Universal Folding Lightweight Anti-Vibration Soft Car Roof Rack
Closed Cell EPDM Foam Rubber Sheet with Adhesive Tape - China Foam Strip, Rubber Seal
Rubber-Cal Closed Cell Rubber EPDM - 39 x 78 - 8 Thickness Variations - Black - Bed Bath & Beyond - 24226373
Rubber-Cal Pure Gum Rubber - 40A - Smooth Finish - No Backing
High Temperature EPDM Sponge Rubber - at ASG