Flown space shuttle-era Solid Rocket Booster Upper Strut EPDM Cover, flown at the beginning of a shuttle launch and retrieved from the ocean after separating during launch. This ‘dog house cover’ measures 14 x 13 x 10 and weighs 17.25 pounds. The white metal front has been stencil painted “Not For Flight,” applied after its retrieval. The vulcanized Ethylene Propylene Diene Monomer (EPDM) rubber cover was a key component that protected the strut holding the SRB to the external tank.Accompanied by a photocopy of the procedure for insulation, EPDM, bonding and fabrication on steel surfaces by United Technologies USBI. The cover protected the attachment hardware for the first 6 minutes of flight, preventing critical components from burning, premature failure, and excessive heat damage. RRAuction COA.