This product penetrates hard steel instantly, providing a durable blue-black finish that won’t rub off. It’s perfect for touching up nicks and scratches on blued surfaces, restoring their original appearance. No heat is required for application, and it reacts quickly, usually requiring only one coat for effective results. Ideal for maintaining the look and integrity of your firearms or other blued steel items.
Key Features:

• Penetrates hard steel instantly and gives a durable blue-black finish that won't rub off
• Used to touch-up nicks and scratches on blued surfaces
• No heat required
• Reacts quickly with usually one coat needed