LPS’s Strong Steel Sticks are hand-kneadable, ready-to-use sticks for emergency repairs. They harden like steel in 20 minutes and can be machined, drilled and painted in 30 minutes. The sticks can be used to plug and seal leaks, permanently fill holes and patch holes and cracks, even underwater. They are safe for use with metal, concrete, wood, fiberglass and ceramics. Strong Steel Sticks are specially formulated with selected steel particles, modified curing agents and special high-quality additives for maximum strength, application, and durability.