---
product_id: 60517443
title: "Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair"
brand: "totalboat"
price: "€ 112.13"
currency: EUR
in_stock: true
reviews_count: 10
category: "Total Boat"
url: https://www.desertcart.hr/products/60517443-polyester-structural-repair-putty-marine-grade-long-strand-fiber-fiberglass
store_origin: HR
region: Croatia
---

# 15-20 min working time at 70°F Waterproof & marine-grade for above/below waterline use High-strength polyester resin + long strand glass fiber Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair

**Brand:** totalboat
**Price:** € 112.13
**Availability:** ✅ In Stock

## Summary

> 🛥️ Fix it once, fix it strong — TotalBoat’s structural putty means no more patchwork panic!

## Quick Answers

- **What is this?** Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair by totalboat
- **How much does it cost?** € 112.13 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/60517443-polyester-structural-repair-putty-marine-grade-long-strand-fiber-fiberglass)

## Best For

- totalboat enthusiasts

## Why This Product

- Trusted totalboat brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fast-Setting Formula:** Cures in just 30 minutes so you can move on to the next step without delay
- • **Precision Workability:** Easy-to-mix paste consistency that won’t sag or run, giving you flawless application control
- • **Marine-Grade Versatility:** Perfect for bonding fiberglass, wood, metal & polyester laminates above or below waterline
- • **All-in-One Repair Solution:** Includes MEKP catalyst and works on boats, autos, home & aerospace projects with zero shrinkage
- • **Unmatched Structural Strength:** Reinforced with long strand fiberglass for maximum crack & impact resistance

## Overview

TotalBoat Polyester Structural Repair Putty is a premium marine-grade, fiber-reinforced polyester filler designed for high-strength structural bonding and repairs. Featuring long strand glass fibers and a fast-setting formula, it offers superior impact resistance and elasticity for durable repairs on fiberglass, wood, metal, and polyester laminates. Waterproof and versatile, it works above or below the waterline and cures in 30 minutes, making it ideal for boat building, automotive, and home repairs. Comes with MEKP catalyst for easy mixing and application, ensuring a smooth, sag-free finish that sands easily when overcoated.

## 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.

Review: Goes on smooth, stays put and doesn't run, dries extremely hard! - 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.
Review: Gets hard. Can crack. Paint it. Mold it. Blue - Works well. It's kinda like hard plastic when it cures.

## 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 70°F (14 drops of MEKP per ounce of putty); adjust amount of catalyst to control working time; paste-like consistency is easy to spread and won’t 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07C9D2GFJ |
| Best Sellers Rank | #10,023 in Automotive ( See Top 100 in Automotive ) #25 in Body Repair Putty #132 in Body Repair Tools |
| Brand | TotalBoat |
| Brand Name | TotalBoat |
| Color | Blue |
| Compatible Material | Concrete, Fiberglass, Glass, Metal, Wood |
| Container Type | Can |
| Customer Reviews | 4.6 out of 5 stars 873 Reviews |
| Full Cure Time | 30 minutes |
| Global Trade Identification Number | 00811932023698 |
| Included Components | Repair Putty, Hardener |
| Item Form | Putty |
| Item Package Quantity | 1 |
| Manufacturer | TotalBoat |
| Material | Polyvinyl Acetate (PVA) , Resin |
| Material Type | Polyvinyl Acetate (PVA), Resin |
| Model | 2907d63b-5599-43e9-982a-55021eeed312 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Superior Bonding Strength and Elasticity, Versatile Use, High-Strength Marine Bonding, Excellent Impact Resistance |
| Part Number | 512951 |
| Special Feature | Superior Bonding Strength and Elasticity, Versatile Use, High-Strength Marine Bonding, Excellent Impact Resistance Special Feature Superior Bonding Strength and Elasticity, Versatile Use, High-Strength Marine Bonding, Excellent Impact Resistance See more |
| UPC | 811932023698 |
| Unit Count | 33 Fluid Ounces |
| Viscosity Level | Medium |
| Volume | 32 fluid ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** TotalBoat
- **Color:** Blue
- **Item Form:** Putty
- **Material:** Polyvinyl Acetate (PVA), Resin

## Images

![Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair - Image 1](https://m.media-amazon.com/images/I/713gXYUXgKL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Goes on smooth, stays put and doesn't run, dries extremely hard!
*by C***L on May 15, 2025*

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.

### ⭐⭐⭐⭐⭐ Gets hard. Can crack. Paint it. Mold it. Blue
*by X***X on August 18, 2026*

Works well. It's kinda like hard plastic when it cures.

### ⭐⭐⭐⭐⭐ Use this in a well ventilated area, indoor tub repair. Took a couple days for the smell to dissipate
*by D***N on May 3, 2023*

Has title said? Make sure you're in a well validated area to allow the smells to dissipate. I use this to reinforce a deep bathing tub. It removed any side parl flex and reinforced the general form amazingly well. No problems with sag at thicknesses of about 1/4 of an inch. No need for fiberglass sheeting to help hold in place or for extra reinforcement damming. I just mixed like instructed and spread onto the unfinished underside to my desired shape and thickness and took the weekend to allow a full cure. I was using a plastic bag taped to my arm over top of a rubber glove to spread into the far away. Hard to reach crevices as the tub was already installed. At one point I tore the bag and glove and got a decent amount up inside against my skin. But the time I got through with the tight space I was working. I had quite the mess on my hand literally. With some elbow grease and some soap and warm water, I was able to remove all of the putty with only removing a few unfortunate hairs.

## Frequently Bought Together

- TotalBoat Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair
- TotalBoat-14409 Marine Gelcoat for Boat Building, Repair and Composite Coatings (White, Quart with Wax)
- TotalBoat - 512949 Polyester Fairing Compound (Quart Kit)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-09-04*