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Leech F-26® Construction Adhesive

Premium Quality & Waterproof

The Amazing F-26® Premium Quality Waterproof Construction Adhesive Developed by Leech Products in 1930

F-26® Premium Quality Waterproof Construction Adhesive

F-26® Adhesive gives you the Adhesive Advantage for all projects!

Our family-owned company has perfected “The Number One Choice” in adhesives for professionals and homeowners who demand unmatched strength and versatility in their adhesives. Our F-26® construction adhesive was the first to surpass the rigorous American Plywood Association AFG-01 standards, setting the benchmark for in-field gluing of plywood to wood flooring joists. With exceptional durability and superior performance in the harshest conditions, F-26® adhesive glue is the choice for those who require long-lasting, heavy-duty bonding solutions. Put it to the test and see why industry experts continue to “Stick with Leech.”

F-26® Construction Adhesive Available Sizes:

  • 1.25 fl. oz. carded tube: F26-32
  • 10 fl. oz. cartridge: F26-33-12
  • 28 fl. oz. cartridge: F26-34

F-26® Applications:

  • Home Construction, remodel, repair
  • Subfloors: Eliminates squeaks, long lasting, stays flexible over time. Covers approximately 275-325 sq. ft. of plywood floor installations per gallon of F-26®
  • Metal stud walls
  • Door saddles & thresholds
  • Metal moldings, electrical outlet boxes, name plates, stair treads, signs, shelving brackets
  • Fiberglass & fiber board
  • Loose bricks, tile, simulated brick
  • Plywood, particle board, paneling
  • Felt & fiberglass pads, indoor & outdoor carpeting
  • Decks & treated lumber
  • Not recommended for polystyrene foam & tub enclosures. See our product F-13®
  • Tilt-up concrete: Reveal strip attachment when molding
  • Outdoor Rock, concrete, pavers
  • Garage Doors: Metal brackets

F-26® Product Characteristics:

  • Shear strengths in lab & field have shown that F-26® glue is the most powerful & longest lasting premium quality construction adhesive
  • After applying product to one surface, join the two materials to be bonded, pull apart for 15-40 seconds, then re-join. Parts are held in place with only momentary pressure and have fast hold. Majority of bond is achieved after 24 hours, but will continue to strengthen for up to a week
  • After cure bond will stay flexible & strengthen with age
  • Bond not affected by vibration or flexing
  • Fills gaps to bridge voids & irregularities
  • Smears will not bleed through paint
  • Storage capacity over 12 months
  • Exceeds standards AFG-01, ASTM-C-557-73, FHA/HUD #60

Environmental Tolerance:

  • Bonds even when items are wet and/or frozen
  • Withstands climate extremes. Product can be used from 0⁰-120⁰F (-18⁰- 49⁰C). Finished product service temperature from -20⁰-150⁰F
  • Not affected by humidity

Why Stick with Leech

We used your F-26® for a waterproof construction project. We have seen zero moisture penetration in any of the areas that have always been problematic. What a great product both from a constructability perspective and performance. If people are serious about building with quality products that get a true return on their construction investment, they need to use F-26® as their construction adhesive. Thanks for continuing the Leech Tradition of Excellence in your products.

Scott A. WestDirector of Business Development

Our lumber company has been a customer of Leech products for 40 plus years. I personally have been purchasing these products for 35 years. The products that we buy from them are top of the line and we have never had an issue with anything. If we do have questions on the products you can call them and talk directly to a person to get an answer. One of the few companies that has maintained quality employees and a quality product through the years.

Bryan JonesHardware Manager
Builders Supply Company

There are many choices for construction adhesive, but there’s really only one if you want the job done right.

Woody HasleyHasley Construction

There’s no competition when it comes to F-26, it’s the best stuff on the market. I use it on everything.

Marty WeathersWeathers Construction

You cannot compare other construction adhesives to F-26. It wouldn’t be fair, there’s simply nothing in its class.

Brad Cunningham, General ManagerArkansas Wholesale Lumber LLC
The Ridout Lumber Companies

Having been a general contractor for over 45 years with 100 million completed commercial and residential projects, I would like to comment on and recommend Leech Products. I use their Wood Filler for oak flooring and cabinet repair. It is the only product that is sustainable and permanent. Great results! No cracking and with care a perfect repair. Also I like F-26 adhesive. No reported failures in 20 years! Thanks for these exceptional products!

R.D. BatesGeneral Contractor, LLC

I have used multiple cases of F-26 Construction Adhesive on projects that glue wood studs to brick walls and sheet rock to studs. I’ve tried other products and they take several days to set up and then still seem soft. I will continue to purchase F-26 only for my projects.”

Jason HardinHutchinson, KS

In 2001, before a distributor show, I played a round of golf with our rep agency. While playing, the head of my sand wedge flew off the shaft 20 yards in front of me. The next day I was telling the sales manager of Leech Products that I needed to buy a new sand wedge because of what happened the day before. He said that I wouldn't need to buy one because all I have to do is put some F-26 in the head of the club, slide it on the shaft and wait overnight. I did exactly what he suggested and totally forgot about it until the next time I played golf. Before I played I warmed up with the sand wedge remembering that I had fixed it with F-26. Just to be sure I tried knocking the head into the ground to see if it would come off. It didn't budge, and over 15 years later I still use that same sand wedge. F-26 is an truly an amazing product.

Greg BradleyIntegrity Sales Group, Inc.

Trusted Quality Since 1930: The Leech Adhesives Story

For nearly 100 years, Leech Adhesives has been a pioneer in the adhesive industry. G.C. Hilton founded the company with a simple mission—crafting reliable adhesives for small businesses across the Midwest. Today, under the leadership of the Barker Family, Leech Adhesives remains committed to innovation, producing high-performance outdoor construction adhesives that contractors and DIYers nationwide rely on. Proudly made in the USA, our products continue to set the standard for durability and strength