Search  for anything...

TotalBoat Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair

  • Based on 784 reviews
Condition: New
Checking for the best price...
$39.99 Why this price?
Save $3.00 was $42.99

Buy Now, Pay Later


As low as $9 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Aug 15
Order within 13 hours and 48 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Size: Quart Kit


Features

  • PRE-THICKENED FIBER REINFORCED POLYESTER PUTTY for high-strength structural filling, fitting, bonding, bedding & radius forming; great for boat building & repair on fiberglass, wood, metal, polyester laminates & core materials; use above or below waterline
  • MARINE FILLER has premium polyester resin and long strand glass fibers for strength, impact resistance & elasticity; ideal for bonding decks, stringers & liners to hulls; filleting and bonding bulkheads, and filling screw holes, bolt holes, chips & dents
  • EASY TO MIX, EASY TO APPLY: For a 100g mass, catalyze with 1% MEKP to get 15-20 min. of working time at 70F (14 drops of MEKP per ounce of putty); adjust amount of catalyst to control working time; paste-like consistency is easy to spread and wont sag
  • FAST-SETTING STRUCTURAL ADHESIVE is ideal for fiberglass & gelcoat repair; for cosmetic fairing, overcoat Polyester Structural Repair Putty with TotalBoat Polyester Fairing Compound; it sands smooth easily & can be finished with TotalBoat Gelcoat with wax
  • AVAILABLE IN QUART AND GALLON KITS: Includes 2 oz. MEKP. This versatile bonding compound can bond dissimilar materials and can also be used in many home, auto, construction, and aerospace applications, with no shrinking or cracking, even in bulk fillings

Description

TotalBoat Polyester Structural Repair Putty is ideal for boat building and repair applications where high-strength structural bonding is critical, such as hull to deck, stringers to hull, liner to hull, and bonding bulkheads. It’s also great for bonding dissimilar composite, fiberglass, wood and metal parts. Its unique combination of high-strength polyester resin and long strand milled glass fiber provides maximum crack and impact resistance in large masses. Just bang it on in one big shot and it holds its shape well as it hardens. This fast-setting marine filler spreads smoothly, is quick to take a radius, and can be built up quickly without sagging. Perfect for fast, easy repairs to fiberglass parts, molds, hulls, decks, canoes, kayaks, runabouts,and more.Polyester Structural Repair Putty is waterproof and great for filling cracks, holes, chips and dents in fiberglass and gelcoat, above or below the waterline. This polyester putty is designed for structural bonding, not cosmetic fairing. For repairs requiring a smooth, easy-to-sand finish, apply TotalBoat Polyester Fairing Compound over Polyester Structural Repair Putty. After the fairing compound cures, sand smooth to prepare for gelcoat, such as TotalBoat Gelcoat with wax, or paint, such as TotalBoat Wet Edge topside paint. If you’re not overcoating the putty with fairing compound, you need to add an air-dry agent such as paraffin wax (4 oz. of wax per gallon of putty) or apply PVA (polyvinyl alcohol) over it. Putty comes with MEKP catalyst (use 1-2% MEKP). This economical, general-purpose, fiberglass filler can also be used to fill joints in sheet metal and fill cracks & voids in wood, masonry, and concrete, making it ideal for automotive, rv and home repair. Compare to Merton's Hull and Deck, 3M Marine High Strength Repair Filler, FGCI Polyester Putty, and Bondo Long Strand Fiber Reinforced Filler. All TotalBoat products provide great value and great results. 100% made in the USA.

Brand: TotalBoat


Material: Polyvinyl Acetate (PVA), Resin


Item Form: Putty


Color: Blue


Item Package Quantity: 1


Brand: ‎TotalBoat


Material: ‎Polyvinyl Acetate (PVA), Resin


Item Form: ‎Putty


Color: ‎Blue


Item Package Quantity: ‎1


Package Information: ‎Can


Item Volume: ‎32 Fluid Ounces


Viscosity: ‎Moderate


Full Cure Time: ‎30 Minutes


Water Resistance Level: ‎Waterproof


Unit Count: ‎33.0 Fluid Ounces


Viscosity Level: ‎Medium


UPC: ‎811932023698


Global Trade Identification Number: ‎98


Manufacturer: ‎TotalBoat


Item Package Dimensions L x W x H: ‎5.31 x 5 x 4.25 inches


Package Weight: ‎1.23 Kilograms


Brand Name: ‎TotalBoat


Number of Items: ‎1


Part Number: ‎512951


Style: ‎Quart Kit


Included Components: ‎Repair Putty, Hardener


Size: ‎Quart Kit


Date First Available: March 27, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Aug 15

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Very good glue
Size: Quart Kit
Very good, It sticks very well and strongly
Reviewed in the United States on October 30, 2025 by MIGUEL GUILLAUME RAMIREZ

  • Goes on smooth, stays put and doesn't run, dries extremely hard!
Size: Quart Kit
After I reinforced a hole in the hull with fiberglass and resin, there was still a low spot. I figured it would take forever to keep filling it in with resin, plus the resin is extremely runny so it is hard to get it to stay in the low spot. I came across this putty and out of the can it is extremely workable, not runny, does not sag and stay put. Even mixing in the liquid hardener does not effect it or make it runny. I applied it to the hull and it literally took one coat and evened the low spot out. I mean it goes on so smooth, and you have plenty of time to work with it before it starts to get tacky. The price is very fair compared to other stuff like Bondo which they say you don't want to use for these types of repairs. I have yet to sand it, but it is extremely hard and nothing an orbital sander can't handle. Hope this review helps as I was going back and forth on what fiberglass to use. ... show more
Reviewed in the United States on May 15, 2025 by Cristobal Cristobal

  • Great stuff!
Size: Quart Kit
I would buy again. Easy to use. No issue, just make sure you are in a well-ventilated area.
Reviewed in the United States on September 12, 2025 by BENNY

  • Works as advertised
Size: Quart Kit
Good stuff! Works great!!
Reviewed in the United States on September 19, 2025 by Keith Davis

  • Filling the gap.
Size: Quart Kit
This works great for what I need. A bit difficult in sanding it down a bit but works well in filling the gaps
Reviewed in the United States on May 27, 2025 by Jaggy98

  • Self application
Size: Gallon Kit
He used this with a repair on the boat
Reviewed in the United States on October 23, 2025 by bbgci

  • Good stuff.
Size: Quart Kit
This stuff is good. Cures really hard. Mixture ratio is a bit hard to find. I mixed by weight. But once cured it’s hard. Used it for a fiberglass hole repair. It’s harder then the original
Reviewed in the United States on May 18, 2025 by mlatc3

  • Great repair and structure filler!
Size: Gallon Kit
Great product!! A+
Reviewed in the United States on December 22, 2025 by Amazon Customer

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...