BLUE THREAD LOCKER PREMIUM GRADE FORMULATED FOR METAL TO METAL DISASSEMBLE WITH HAND TOOLS PREVENTS LOOSENING DUE TO VIBRATION Uses: Z-42 Thread Locker is the finest blue thread locker money can buy, and has hundreds of uses. Lock set screws, axle and drive nuts, engine mounting screws, or any screw that keeps your R/C airplane, helicopter, car, or boat from coming apart. But Z-42 Thread Locker isn’t just for hobbies, use on autos, boats, snow mobiles, lawn equipment, tools, bicycles, and even toys. Anywhere fasteners are subjected to vibration that can cause them to loosen and fall out Z-42 Thread Locker helps to keep things together. Helpful Hints: Apply Z-42 in small amounts, this very important on small fasteners. Just a small drop right on the threads is all that is needed. If the screw cannot be loosened after Z-42 Thread Locker has hardened, you can apply some heat directly on the screw to soften the Z-42.Use a soldering iron or small torch, be careful when handling the hot parts.