• Products
  • Content
    The product images shown are Illustrative only and may not be an exact representation of the product.

    DEF Tank Locking Caps

    As little as .169 ounces/5ml of diesel or other fluids in a DEF or AdBlue Reservoir can cost thousands of dollars in aggravating service repairs. Stops contamination and costly engine repairs. Prevents sabotage, theft, and/or cross contamination. Free spins when locked.

    Blue caps easily identify DEF tank filler neck, and are easily distinguished from other vehicle tanks. Features a locking mechanism to prevent theft, vandalism, or accidental incorrect fluid fills.