Tri-Flow Superior Lubricant


Tri-Flow Superior Lubricant has proven itself to us as one of the most high performing and effective lubricants. Easily squirt some directly into your Mail Boss lock, to prevent sticking and other related lock issues. Preventative maintenance will save you time, money and hassle.

In stock

Free shipping, Lifeime warranty
SKU: TFT25 Category:


The ultimate lubricant for use with Mail Boss locking mailbox locks. We recommend using Tri-Flow to help prevent a variety of lock issues including sticking, refusal of key, and complete lock failure.


  • Superior light viscosity lubricant allows for deep penetration into the Mail Boss mailbox locks and other hard-to-reach moving parts
  • High-grade petroleum oils provide optimum lubrication under extreme temperatures (-60 to 475°F) and humidity
  • Formulated solvents soften and remove dirt and contaminants
  • Special additives displace moisture and prevent rust and corrosion
  • Formulated with P.T.F.E.
  • Proven in a range of automotive, industrial, marine & commercial environments
  • 1/4 fl oz (7 mL)
  • Free Shipping by USPS included

We have conducted many tests on our boxes here at Mail Boss, and through all of these tests we have found Tri-Flow lubricant to have the most comprehensive and excellent performance on the moving parts of our locking mailboxes. Use of this product can help prevent the hassle of lock replacement, saving time and money in the future and ensuring extended lifetime out of your Mail Boss product.