---
product_id: 44092207
title: "Underdog Marine Antifouling Bottom Paint for Fiberglass, Wood and Steel Boats (Red, Gallon)"
brand: "totalboat"
price: "€ 514.46"
currency: EUR
in_stock: true
reviews_count: 8
category: "Total Boat"
url: https://www.desertcart.hr/products/44092207-underdog-marine-antifouling-bottom-paint-for-fiberglass-wood-and-steel
store_origin: HR
region: Croatia
---

# Compatible with fiberglass, wood, steel Single-season durable protection 500 sq ft coverage/gallon Underdog Marine Antifouling Bottom Paint for Fiberglass, Wood and Steel Boats (Red, Gallon)

**Brand:** totalboat
**Price:** € 514.46
**Availability:** ✅ In Stock

## Summary

> 🛥️ Keep your hull sleek and barnacle-free — because your boat deserves the best!

## Quick Answers

- **What is this?** Underdog Marine Antifouling Bottom Paint for Fiberglass, Wood and Steel Boats (Red, Gallon) by totalboat
- **How much does it cost?** € 514.46 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/44092207-underdog-marine-antifouling-bottom-paint-for-fiberglass-wood-and-steel)

## 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

- • **Smooth Sailing Prep:** Ablative formula prevents paint buildup, making next season’s prep a breeze
- • **Rugged Trailering Ready:** Durable finish withstands trailering, beaching & everyday wear
- • **DIY-Friendly Application:** Easy brush, roller, or spray application with optional thinning for flawless coverage
- • **Effortless Marine Defense:** Copper biocide actively repels barnacles & mussels all season long
- • **Universal Hull Compatibility:** Perfect for fiberglass, wood, steel, and iron boat bottoms

## Overview

TotalBoat Underdog Marine Antifouling Bottom Paint offers an economical, single-season solution to marine fouling with a copper biocide formula that actively prevents barnacles and mussels from attaching. Designed for fiberglass, wood, steel, and iron hulls, it provides durable protection that withstands trailering and beaching. Its ablative action ensures no paint buildup, simplifying next season’s maintenance. Easy to apply by brush, roller, or spray, this waterproof, solvent-based paint covers 500 sq ft per gallon and is ideal for frequent boaters seeking reliable, cost-effective antifouling performance.

## Description

TotalBoat Underdog marine bottom paint is an affordable way to keep barnacles, mussels and other clinging marine fouling pests off the bottom of your boat for a full season. Its ablative action wears away gradually as your boat moves through the water to ensure there's always a fresh layer of biocide to combat marine growth. As it wears away over the season, there’s no paint build-up, so you’ll have less sanding to do next season before applying a new coat. It’s also very durable, and can take the bumps and scrapes from trailering, beaching, and normal wear-and-tear all season long. It's ideal for use on sailboats, power boats, work boats and fishing boats, and is an excellent value for short-season boaters who use their boats on a regular basis. Underdog sticks to properly prepared substrates, and is an ideal for fiberglass, wood, bare steel, and iron boats. It’s also compatible with most previously applied bottom paints. Underdog is easy to apply by brush, roller, or spray equipment, and can be thinned for improved flow, up to 10%, with TotalBoat Special Brushing Thinner 100 (brush/roller application), or TotalBoat Spray Thinner 101 (spray application).Compare this bottom paint to Pettit Unepoxy HRT, Rustoleum Boat Bottom Paint, US Marine Products Coastal Copper 250, Blue Water Marine Paint Copper Shield 25, and Interlux Fiberglass Bottomkote NT. Underdog is a marine paint intended for antifouling use on boats, applied to hulls and boat bottoms below the waterline only. It is not intended for household use. All TotalBoat marine products provide great value and great results. 100% made in the USA.

Review: Best bang for your buck if you know what your doing .. - With all the ablative antifualing paint around for 200 a gallon and up it's nice to see a product come in under 100 bucks that gets the job done !! This one gallon comes with a kit and I was blown away for the price!! Paint try brush roller gloves and jump suit all included in ur shipped box !!! The epoxy and paint are both great I bought both and rarely do reviews unless I'm overly impressed.. some people keep there boats in year round in heavy salt conditions and I guess if that's what ur doing and u want to spend 300 on paint that's great .. but for the rest of us this stuff is nice easy to work with dries strong and the color blue they have is awesome!!! I found this product to do the job exactly as described and with some elbow grease you could really do a nice job with it ... the only negative if there is one is the can was a bit dented like the rest of reviews say but nothing that I thought mattered.. keep up the good product nice to see someone giving u a decent product with extras and not trying to rob you
Review: Poor packaging - Product is great. Shipping poor. Ordered once, it never arrived. Ordered 2nd time and it arrived but the can is so dented that I can't believe it did not leak. I need to use it this weekend or I would return due to condition. I've bought this product before and it always came with a roller, sash, tray, and protective suit. All I received was a dented can.

## Features

- ECONOMICAL ANTIFOULING BOTTOM PAINT provides excellent single-season protection; copper biocide keeps barnacles and mussels from clinging to hull bottoms; ideal for sailboats, power boats, fishing and work boats in all types of saltwater conditions
- EFFECTIVE MARINE PAINT prevents barnacles from attaching to your hull by releasing fresh biocide as water moves under the boat; best for boats used frequently; durable finish withstands trailering & beaching better than traditional ablative paints
- FOR USE ON PROPERLY PREPARED FIBERGLASS, WOOD, STEEL, AND IRON BOAT BOTTOMS; because the ablative coating wears away during the season, there's no paint buildup, which makes your bottom paint job easier next season
- EASY TO APPLY: Use a natural bristle brush, or a 3/16” nap or foam solvent-safe roller, or use airless or conventional spray equipment. THINNING (10%): brush/roller - TotalBoat Special Brushing Thinner 100; spray equipment - TotalBoat Spray Thinner 101
- AVAILABLE IN GALLON SIZE IN BLACK, BLUE AND RED COLORS. Coverage: 500 sq ft per gallon; this product is a marine paint intended for antifouling use on boats, applied to hulls and boat bottoms below the waterline only; it is not intended for household use

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00HS5EFO2 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #29,214 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #49 in Boat Hardware |
| Brand | TotalBoat |
| Color | Red |
| Color Code | FF0000 |
| Coverage | 500 |
| Customer Reviews | 3.8 3.8 out of 5 stars (573) |
| Date First Available | November 13, 2015 |
| Dry Time In Hours | 16 |
| Finish | Flat |
| Finish Type | Flat |
| Full Cure Time | 16 Hours |
| Global Trade Identification Number | 00811932020369 |
| Included Components | Paint |
| Indoor/Outdoor Usage | Outdoor |
| Is Discontinued By Manufacturer | No |
| Is Waterproof | True |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 1 Gallons |
| Item Weight | 17.84 pounds |
| Item model number | 365430 |
| Manufacturer | TotalBoat |
| Package Dimensions | 8.27 x 8.19 x 7.6 inches |
| Package Information | Can |
| Paint Type | solvent-based |
| Part Number | 365430 |
| Size | 128 Fl Oz (Pack of 1) |
| Surface Recommendation | Fiberglass, Wood, Steel, Iron |
| UPC | 811932020369 |
| Unit Count | 128.0 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** TotalBoat
- **Color:** Red
- **Finish Type:** Flat
- **Indoor/Outdoor Usage:** Outdoor
- **Item Form:** Liquid
- **Item Volume:** 1 Gallons
- **Paint Type:** solvent-based
- **Size:** 128 Fl Oz (Pack of 1)
- **Surface Recommendation:** Fiberglass, Wood, Steel, Iron
- **Unit Count:** 128.0 Fluid Ounces

## Images

![Underdog Marine Antifouling Bottom Paint for Fiberglass, Wood and Steel Boats (Red, Gallon) - Image 1](https://m.media-amazon.com/images/I/61LLh9QU-PL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best bang for your buck if you know what your doing ..
*by P***. on June 13, 2019*

With all the ablative antifualing paint around for 200 a gallon and up it's nice to see a product come in under 100 bucks that gets the job done !! This one gallon comes with a kit and I was blown away for the price!! Paint try brush roller gloves and jump suit all included in ur shipped box !!! The epoxy and paint are both great I bought both and rarely do reviews unless I'm overly impressed.. some people keep there boats in year round in heavy salt conditions and I guess if that's what ur doing and u want to spend 300 on paint that's great .. but for the rest of us this stuff is nice easy to work with dries strong and the color blue they have is awesome!!! I found this product to do the job exactly as described and with some elbow grease you could really do a nice job with it ... the only negative if there is one is the can was a bit dented like the rest of reviews say but nothing that I thought mattered.. keep up the good product nice to see someone giving u a decent product with extras and not trying to rob you

### ⭐ Poor packaging
*by R***R on March 20, 2025*

Product is great. Shipping poor. Ordered once, it never arrived. Ordered 2nd time and it arrived but the can is so dented that I can't believe it did not leak. I need to use it this weekend or I would return due to condition. I've bought this product before and it always came with a roller, sash, tray, and protective suit. All I received was a dented can.

### ⭐⭐⭐⭐⭐ Amazing Product Well Exceeded My Expectations!
*by J***R on May 30, 2017*

Simply amazing!!! Totally exceeded my expectations. I opened the box and they included for free: a complete roller, tray, gloves, body suit, dust mast, and mixing sticks. All free!!!! I have been bottom painting my own boats for over 20 years and this paint was the best value for the price. It came well mixed and applied very well. My boat has been in the slip for almost 3 weeks now and there is still no single salt line or growth starting yet. For this product I paid $82 plus shipping and again all inclusive with supply materials. Previously at rip off West Marine I would pay $129.99 and still have to buy all the support materials. If you are reading this please trust me I have been doing my own boat maintenance for over 20 years and have learned a lot over the way, many many mistakes included. This product is awesome you will be very pleased!

## Frequently Bought Together

- TotalBoat Underdog Marine Antifouling Bottom Paint for Fiberglass, Wood and Steel Boats (Red, Gallon)
- TotalBoat Wet Edge Marine Topside Paint for Boats, Fiberglass, and Wood (White), 1 Gallon (Pack of 1)(Packaging May vary)
- TotalBoat Special Brushing Thinner 100 (Quart)

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**Shop now:** [https://www.desertcart.hr/products/44092207-underdog-marine-antifouling-bottom-paint-for-fiberglass-wood-and-steel](https://www.desertcart.hr/products/44092207-underdog-marine-antifouling-bottom-paint-for-fiberglass-wood-and-steel)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-20*