It is a red, high-strength threadlocker for permanently locking and sealing bolts, nuts and studs to prevent loosening due to vibration. The non-drip stick format makes it ideal for vertical and overhead applications. It works on all metals without primer, including passive substrates such as stainless steel, aluminum and plated surfaces. Cures through most corrsoion prevention oils and cutting fluids on "as-received" fasteners without aggresive cleaning.