EB Green
From Halopedia, the Halo wiki
EB Green is the UNSC's heavy duty tape. It was only mentioned when "the Master Chief either made some special modifications, used some EB Green to tape a little extra ammo on himself, had a 'full combat load' as described in Halo: The Flood." The U.S. Navy has their own version of EB Green with is military grade duct tape. EB Green is found throughout the Navy and rumored to originate from the Electric Boat shipyard, hence the name. If you’re a US Submariner (current or former) you've probably heard stories about and experienced the unbelievable strength of “EB Green” duct tape.
External Links
http://lubbers-line.blogspot.com/2006/03/eb-green-tape-stuff-of-urban-legends.html
