its a neoprene seal. didnt work so well.
so the glue finally did dry, and we fired up the air compressor. everything looked good when we checked it over. so we started filling it up, and at 50-60psi, the barell came flying out of the chamber! i guess we forgot to seal the barell. whatever, the air coming out of the barrel was enough to knock a bike off the wall. i guess we can call it a success!!
