@felix gideons glue also known as mycopropelene is a substance invented for use in chemical warfare against cybertronians. it was used as a blister agent dropped on battlefields from above and was highly corrosive, eating through their bodies. it would also stay around in the body and be capable of killing a victim long after initial exposure

@felix cliffjumper has a weapon that fires "glass gas" which is a gas that alters the chemical makeup of the victim's body to that of glass. this one's a little iffy IMO but like it does exist