"Used this for the 1st time today on 10yr old rusted exhaust bolts. As these are notorious for being seized solid, I didn't want to risk the aggro of a snapped bolt or mashed head, so I used Crack It as a precaution on all the bolts before undoing them. What a brilliant invention .. I was impressed !"
"Use this all the time and works 99% of time to release those stubon nut and valves. Use often to free old rad valves befor removing radiators. Works wonders on imersion heater bosses. Always have a can in my tool box"