[QUOTE=ShelledPants;923282]By "barrel seal" do you mean the hop up rubber? I don't know about "slide seals".
i'm pretty sure it was the silicone , either that or the crossman soft air oil.
it was gunk heavy duty silicone lubricant. and it was in an aerosol can. so double whammy! i guess its used to hinges and locks and stuffs!