LOCTITE Freeze & Release penetrating oil instantly freezes seized and rusted bolts, nuts and studs down to -38*F (-39 *C). The exceptional shock-freeze effect of this penetrating oil causes microscopic cracks in the layer of rust, allowing the lubricating ingredient to wick directly into the rust by capillary action. The rusted bolt assembly can be easily dismantled after allowing only 1-2 minutes penetration time.