International Shipping Available Through Our Shopping Cart

Original ULTRA Tef-Gel® Protecting your boat since 1989


Prevention of galvanic corrosion between dissimilar metals

Eliminates seizing and galling of dissimilar metals

Lubrication that will not break down, even in salt water or detergents

The Tef-Gel Story

During my years in the Aerospace industry, I used many Hi-Tech products not available to the public. Decades later, I am applying my Aerospace knowledge to my career in the marine industry.

The most common problems I see are: blistering, corrosion, rust, galling, and seizing of metals. To eliminate this, I discovered a PTFE compound that when properly applied, eliminates these common hardware problems in marine environments. I call this compound TEF-GEL®. It’s space age design doesn’t break down in saltwater or detergents.

TEF-GEL® has never failed me! I’ve sold this commercial grade product to the most demanding professionals at major equipment manufacturers, rigging company’s, and ship builders with complete satisfaction.

Robert P. Mergenthaler
ULTRA Safety Systems

DUNS: 012792252  /  CAGE: 7WBJ5

NAICS: 324191  /  PSC: 9150

  • 5 out of 5 stars Quality Stuff

    This stuff is pretty remarkable. Will have to post update about its ability to prevent galvanic corrosion, but so far it seems to be doing its job. Using it on a motorcycle engine that has aluminum block and stainless fasteners. 45 year old engine had some fasteners that were seized and impossible to remove even with extractors. Didn’t want that same issue again, so I did some research and came up with this stuff. A little sticky to work with, but nothing that gojo won’t clean off your hands.

    Randall Puzzitiello
  • 4 out of 5 stars But I believe this to be an excellent product.

    Did not come with use instructions. I called the maker and he said he will post a usage video soon. But I believe this to be an excellent product. One star deducted for lack of instruction with product or available online.

    Kathleen A. Foster
  • 5 out of 5 stars Great way to prevent electrolysis galling of dissimilar metals.

    This stuff really works. Put it on every bolt that needs to come off at a later date. Prevents electrolysis galling

    Uncle Devo
  • 4 out of 5 stars Top of the line product for Marine/water/application applications.

    No need to get anything else anymore for all the metal parts used in marine applications especially screws, fishing reels (everything metal), fish rod guides. Note: This is a thick gel it tends to hold up a little but I have not seen much a problem on bait cast reels gears and spinning reels. There is or was also a lighter Tef-Gel version but I have not found it around anymore. If you can get the lighter version then it may work better on application to moving parts as it is not so sticky. The gel is very sticky and will stick to hands, clothes, but will wash out with some hand soap from hands. Only part I’m stating as a loss is that it does not come with the useful and pictured application brush. I wouldn’t look for something else its a great product

    Mr. Jan Kovar
  • 5 out of 5 stars Worth every penny! Incredibly effective at what it does.

    This is an incredible product. It’s not a high-speed lubricant and can’t be used in the presence of intense heat. E.g. no problem on your battery bolts; don’t use on spark plug threads… Otherwise it is the answer for everything: galling, slow-moving lubrication, seizing from rust or (especially) electrolysis, cannot be washed out, won’t evaporate, non toxic (as long as it doesn’t burn – it’s 40% pure Teflon powder, which is toxic if burned), will not actively contaminate paint like silicone, etc. For fasteners in aluminum there is simply no better option. 4oz will last a long time and will pay for itself hundreds of times with the problems you never end up having. Great, great product! 

    M. Brady
  • 5 out of 5 stars There is nothing better..

    for a salty marine environment where corrosion is viral. I am working on sailing boats and every time I use Tef-Gel on aluminum/stainless steel connections, I realize that I am doing that for the person who have to take it apart. Instead of cursing, drilling and tapping you just take the bolts out again. On my own boat maintenance became a lot easier and I hope the next time I have to take something apart, that the one who mounted it, used Tef-Gel.

    Rudy Schellingerhout
  • A four ounce tub is pretty much a lifetime supply for a weekender like myself, and worth getting as this is the cheapest way to acquire a volume of it. Its an amazing material and does everything it claims to. Many high end boat builders put this on all threaded fasteners. I now do the same. It is especially useful to fasten dissimilar metals, as it will deny galvanic corrosion. It simply cannot be washed away from the fastener by water or solvents.

    Four by Five
  • 5 out of 5 stars Excellent product! I have been using it for about …

    Excellent product! I have been using it for about 10 years in the marine environment it is amazing. I have not found anything else like it on the market. This is a must have item for salt water use.

    JP Flyrod
  • 5 out of 5 stars I love this stuff

    I love this stuff. I live on a boat, where corrosion is viral, especially on aluminum/stainless steel connections. Nothing I’ve coated with this has corroded, even after many years of salt water splashes. Makes maintenance into a relatively easy chore instead of a fight to the death with fasteners.

    Stephen A O'Brien
  • 5 out of 5 stars Perfect for Fishing Reel Drag Washers

    I have the 20cc syringe which I purchased last year (that size doesn’t seem to be available right now). I’ve been looking for a suitable grease to use on my fishing reel drag washers. This lubricant is perfect to use on any carbon fiber drag washer. Just a light coating on each side of the washer does a great job if applied properly. It’s much thicker and stickier then any of the other lubes that I’ve tried for this application (“Cal’s, “Penn Bue Grease” or “Shimano Grease”)….very similar to the stuff that came with the old Newell reels. A little goes a long way.

    The Reader
  • 5 out of 5 stars Really works!!

    I have been using this product for years on my ocean aluminum catamaran to prevent corrosion between the aluminum boat and stainless screws due to dissimilar metals. Screws come right out when needed!!

    B Bug
  • 5 out of 5 stars Very good product

    Used it to attach Spinlock cam cleats with stainless steel screws to aluminum plate below the deck combing. Expensive, you don’t need a lot.

    A. Robert Gelb
  • 5 out of 5 stars 100% corrosion inhibitor

    Don’t fasten stainless and aluminum without tef-gel.

    Randy Shockley
  • 5 out of 5 stars Great for squeaky bushing too

    I use this to lube the polyurethane suspension bushings on my truck. Completely keeps everything from squeaking. Great product to have in every garage.

    Patrick G
  • 5 out of 5 stars Just What’s Needed when Steel and Aluminum Are Close

    It’s gooey and sticky enough to work great.

    G. M.
  • 5 out of 5 stars Indispensable for a marine mechanic

    If you’re joining different metals, like aluminum with Stainless steel bolts, this stuff is indispensable. Expensive for the quantity, but a little goes a long way. Nice applicator

    Paul Manning
  • 5 out of 5 stars Must have for aluminum boats

    100% satisfied; delivered and performed as advertised. For an aluminum boat, always have Tef-Gel handy.

  • This stuff works!!!

    I have an 36′ aluminum power catamaran and have tons of stainless screws throughout my boat. The builder neglected to prevent corrosion between the stainless screws and the threaded aluminum and I soon discovered major corrosion. I found Tef-Gel on the internet and took out every screw on my boat and applied Tef-Gel. to the threads. I reapply Tef-Gel every two years just for safety and have had no frozen fasteners in the last eight years.

    William P Bugg
  • Great stuff!!!

    Saltwater has meet its match. Use it on all my reels. It’s very sticky but works well for me.

  • Used it to attach Spinlock cam cleats with stainless steel screws to aluminum plate below the deck combing. Expensive, you don’t need a lot.

    Robert Gelb


Use On:

Any screw or bolt installed to

  1. a) Prevent corrosion between dissimilar metals i.e. stainless screws, bolts or rivets into aluminum (paint blistering, frozen fasteners, outboard motors).
    1. Prevent galling on stainless and titanium fasteners, and
    2. Discoloration and rot in wood (water cannot get past it).
  2. Moving parts to lubricate:
  3. Hatch and porthole dogs, hinges and
  4. Fighting chairs slides, swivels, locking pins and
  5. Outrigger slides, pulleys, rigging screws.
  6. Slide, swivels, snaps etc. Slower moving bearing and cams to:
  7. Replace petroleum greases that wash out in3
  8. Enable lifetime use of bearings in hard access like lazzarettcs and furling gears.
  9. Replace silicone to lubricate
  10. Pump gaskets, heat exchanger parts and PVC fittings to:
    1. Stop weeping around endplates, faceplates, heat exchangers and plumbing
    2. Allow better sealing and adjustment in PVC
  11. Replace grease in shop on
    1. Punches presses, drill presses (longer life, smoother operation).
  12. Propeller shafts to allow easy removal of propellers (especially splined shafts). Packing in glands to make stuffing box drip free.
  13. Use on all your battery ends in flashlights etc. to stop tin oxide formation, making your batteries last much longer.
Many, many other uses! Cleans up with Mineral Spirits. Waterproof. Will not wash away.

A note from one of our happy customers:

 I was having problems with the steering cable on my 2006 SeaDoo Sportster and I was talking about it with my co-workers.  The boat had sat, mostly in a garage, for the last 3 years and the steering was stuck.  I had to pull as hard as I could on the wheel to break it free. One night, I spent about two hours spraying WD-40 on the cable, working the wheel, and wiping off the rusty brown fluid coming out of the cable.  I got it to work about 50% free (it was still difficult to move and made noise when steering). Today, about a week later, I was given a small applicator of your Tef-Gel by my boss, Bryan Daugherty. He said, “This is supposed to be the best stuff out there, try in on your steering cable.”
  Of course, I was skeptical, after all, it’s such a small amount of what looked like some form of lithium grease.  I couldn’t see that helping my situation, but I got set to apply it anyway.  I put a small amount on my finger and applied it to the extended cable and started working it back and forth.  At first, there was no change, but as I added about 4 more fingertips worth, the cable got quieter, and the wheel freed up even more. I honestly couldn’t believe it.  I kept working the wheel and wiping the excess off of the cable and smearing it back on until there was a light
film of Tef-Gel on the extended, visible part of the cable.  It’s almost brand new.  There is still some minor noise, probably because of built up rust, but I do NOT have to replace the cable!  I only used half the applicator, and I’m sure I’ll apply some more after this season. It’s WAY better than lithium!

You have a great product!  Please keep up the amazing work…

Thanks a million,
Rick R. Hinzman

Manufacturers Using ULTRA Tef-Gel®



Dole fresh Fruit

Dynetk Systems Corp.

General Dynamics Robotics

General Dynamics SATCOM Tech

Haas TCM Inc.

Freeman Marine

Night Vision Technology, Inc.


Seiler Hughes

Idaho Power Supply

Carrier Transicold

LH4 Associates

Lockheed Martin

Naval Special Warfare Dev.

Naval Surface Warfare Center

Northrop Grumman Systems Corp

Stidd Systems, Inc.

The Bern Group

The Boeing Co.

U.S. Coast Guard

Underwater Lights, LLC

US Army Aberdeen Test Center


Winthrop Tool

US Marine Corp.