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Product Details

TotalBoat Polyester Structural Repair Putty makes critical bonding applications on polyester laminates easy, strong, and permanent. Its trowelable, thixotropic formula spreads smoothly & won't sag, making it great for fairing vertical surfaces. Polyester Structural Repair Putty is also easy to shape, so it's ideal for radius forming.

Reinforced with long strand milled glass fibers, this high-strength, fast-setting marine bonding putty adds strength & dimensional stability to structural, boat building & repair applications including bedding and tooling. Great for reinforced bonding on hulls, decks & stringers, and multi-purpose bonding on FRP composites, core materials, and wood. Add 1-2% MEKP catalyst based on mass, ambient conditions, and desired working time.

Available in Quart and Gallon Kits that include MEKP catalyst, and 1 spreader.

Tech Specs
Technical Specifications TotalBoat Polyester Structural Repair Putty
Application Temperature 50°F - 95°F
Catalyst Catalyze with 1-2% MEKP, based on mass, ambient conditions, and desired working time. More catalyst will shorten working time, but will maintain working time at cooler temperatures.
Working Time For a 100g mass, catalyze with 1% MEKP for approximately 15-20 minutes of working time at 70°F (14 drops of MEKP catalyst per ounce of Polyester Structural Repair Putty).
Cure Time Dependent on temperature, catalyst amount, and mass of putty. For example, cure time will be 20-30 minutes for 100g mass catalyzed with 1% MEKP @ 77°F
Weight 8.9-9.1 lbs./gal.
Shelf Life/Stability Approximately 3-4 months (can be longer, depending on storage conditions). Keep container closed tightly, and store in a cool (below 75°F), well-ventilated place.
Info & Guides

Great for Structural Bonding, Filling, & Fairing Above or Below the Waterline

TotalBoat Polyester Structural Repair Putty uses a premium resin reinforced with long strand milled glass fibers for strength and impact resistance. In addition to structural bonding, bedding, and tooling applications, it's perfect for filling larger voids and gouges that are too deep for cosmetic fairing compound.

This high-strength polyester putty is engineered for structural bonding, filling, & fairing, not for cosmetic filling and fairing. For cosmetic fairing and repairs requiring a fine finish, use TotalBoat Polyester Fairing Compound over cured Polyester Structural Repair Putty. Allow the Polyester Fairing Compound to cure, then sand to achieve an extremely smooth surface ready for gelcoat or paint.

IMPORTANT!

TotalBoat Polyester Structural Repair Putty will not cure in air, and requires overcoating with an air dry material such as PVA (polyvinyl alcohol), paraffin wax, polyester resin with wax, gelcoat with wax, or TotalBoat Polyester Fairing Compound, in order to effect a proper cure.

Technical Information

TotalBoat Polyester Structural Repair Putty Features

  • Provides high strength, dimensional stability, and flexibility.
  • Forms strong primary bonds with polyester & vinylester laminates.
  • Easy to mix and easy to use.
  • Spreads evenly, no sagging.
  • Sets up quickly.
  • Minimal shrinkage.
  • Use above or below the waterline.

Uses for TotalBoat Polyester Structural Repair Putty

  • Bonding polyester laminates
  • Structural repairs
  • Filling and fairing
  • Radius forming

Important Safety Information

WARNING: This product can expose you to chemicals including styrene, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov

Always wear protective gloves, protective clothing, eye protection, and face protection when working with TotalBoat Polyester Structural Repair Putty. Personal protective clothing should include appropriate gloves, safety glasses or goggles, a proper respirator, and a proper apron or similar protective clothing. Keep away from heat, hot surfaces, sparks, open flames, and other ignition sources. No smoking. Only use outdoors or in a well-ventilated area. Store in a cool, well-ventilated place (below 75°F). Do not handle until all safety precautions have been read and understood.

Shelf Life

Polyester resins have a limited shelf life and will, over time, harden in the container without the addition of catalyst. Shelf life is dependent on a number of factors such as product formulation and storage conditions. As a general rule, the shelf life for uncatalyzed polyester resins should be up to 6 months when stored in dry, cool conditions below 70°F. Warm to above 60°F before use.

Reviews for TotalBoat Polyester Structural Repair Putty

10 of 15 Reviews

August 5, 2021

Excellent tooling
By Jarret from Santa Cruz

Verified Purchase

Goes on easily and fills voids in tough to reach areas. The product work excellent.

Bottom Line Yes, I would recommend to a friend

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July 8, 2021

Hard as a rock
By dunphy custodian from durango colorado

Verified Purchase

I am impressed with the hardness of this stuff, but it's a little brittle. There is definitely a use for it, but not where flexibility is needed. I used it to repair some small holes in the keel of my wooden boat where a few screws rusted out,and left small voids-which caused leaks and some rot. I am very happy with the sheer hardness and strength. I am a little concerned about flexibility. If your application requires flexibility, keep looking... the right product is surely out there. If you don't need any flexibility, this stuff is amazing!

still floats.....
Bottom Line Yes, I would recommend to a friend

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June 24, 2021

My new stringers
By Captain Jack from Oklahoma panhandle

Verified Purchase

Quality product fast delivery

Bottom Line Yes, I would recommend to a friend

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May 31, 2021

Amazing stuff
By Eddie from Santa fe ,tx

Verified Purchase

This repair putty is absolutely amazing it drys rock hard and creates a amazing strong bond

Bottom Line Yes, I would recommend to a friend

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April 18, 2021

Product is good, but,,,,
By Been better from East coast

Verified Purchase

No mixing instructions..


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October 28, 2020

Highly recommended
By Mike from Waretown NJ

Verified Purchase

I used this when I replaced the deck in my boat to glue down the coosa board. Unbelievably strong.

Bottom Line Yes, I would recommend to a friend

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June 6, 2020

I would buy this again
By Wayne from Windber, PA

Verified Purchase

Was very easy to work and finished very well

Bottom Line Yes, I would recommend to a friend

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May 11, 2020

Yes absolutely
By BigB from Everett, WA

Verified Purchase

Product works extremely well for a casual diy. I am undergoing a stringer and transom replacement. This product takes a lot of guess work and time out of mixing a thickened product. The consistency is prefect for fillets, bedding stringers, filling small holes etc.

Bottom Line Yes, I would recommend to a friend

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March 19, 2020

I will reorder again
By Line-X Cape Cod from Hyannis, Ma

Cored out foam from a large/long wheelhouse window along the starboard side opening and needed to reinforce and seal it. Worked perfectly and I was able to completely fill the cored cavities overhead as well as the curved and flat surfaces without any issues. I mixed small batches of 6 oz at a time to insure proper mixing. Note: counting drops can be an issue so a standard medicine dropper conversion is...20 drops= 1 ml

Bottom Line Yes, I would recommend to a friend

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January 6, 2020

Stuff works, not sure I got the right catalyst...
By Bayou Bum from Texas Coast

Verified Purchase

Product is easy to use once it's mixed with the catalyst. Not sure if it was a mistake or the norm but I received a small bottle of liquid MEKP catalyst, like you get with liquid products like resins, to use with this product, which is a paste. Not impossible to mix but dang hard to measure out a small amount of each. Would rather use a paste catalyst like you get with other fairing products.

Bottom Line Yes, I would recommend to a friend

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