Free shipping on orders over $99.99! Don't miss out!

This item is eligible for free shipping on orders over $99.99
This item will require additional time to ship

Product Details

TotalBoat Underdog is a dependable, solvent-based, single-season antifouling bottom paint that provides outstanding protection against barnacles and other antifouling pests, at a very affordable price, and in all water conditions. Ablative technology allows the surface to polish away over time, minimizing paint build-up and releasing fresh layers of biocide as the season progresses. This ablative action works most effectively on boats that are used on a regular basis. Underdog's durable finish also stands up well to scrapes from beaching and trailering.

It has excellent adhesion on fiberglass, wood, steel, iron and most existing bottom paints that are in good condition.

Sold in Gallons, in Black, Red, or Blue.

Each order includes a free roller & metal tray kit, paint suit, abrasive pad, 1 roll of painter's masking tape, & two 10" stir sticks (a $10 value!).

Tech Specs
Thinning (Brush/Roller Application) TotalBoat Special Brushing Thinner 100
Thinning (Spray Application) Xylene (Xylol)
Cleanup TotalBoat Special Brushing Thinner 100 or TotalBoat Dewaxer & Surface Prep
Surface Prep Solvents TotalBoat Special Brushing Thinner 100, TotalBoat Dewaxer & Surface Prep
Primer (Bare Fiberglass / Bare Steel / Iron) TotalBoat TotalProtect Epoxy Barrier Coat Primer for fiberglass and steel (not for use on aluminum)
Coverage 500 sq. ft. per gallon
Number of Coats 2
Recommended Roller 3/16'' nap or foam solvent-safe roller cover
Spray Equipment Airless or conventional
Info & Guides

Technical Information

Underdog Features

  • Economical marine antifouling paint.
  • Excellent protection against barnacles in all water conditions.
  • Durable finish resists abrasion from trailering and beaching.
  • Easy to apply by brushing, rolling, or spraying.
  • Apply to properly prepared fiberglass, wood, steel, iron, and previously painted surfaces in good condition.

WARNING: This product contains a chemical known to State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov

Reviews for TotalBoat Underdog Bottom Paint

10 of 84 Reviews

June 17, 2021

Goes on great
By Old Salt from Woods Hole, Massachusetts

Verified Purchase

Seems a little thinner than most other ablative bottom paints, so ask me after the summer how well it worked. I tend to go under the boat every week or two anyway, so I'll have a good picture of the growth it allows.

Bottom Line Yes, I would recommend to a friend

Was this review helpful to you?

May 8, 2021

Bottom Paint complete kit
By Mr D from Bristol, RI

Verified Purchase

Great buy this paint came with everything needed to complete the task. I painted my 23' fishing boat after prepping the bottom, and it covered perfectly.

Bottom Line Yes, I would recommend to a friend

Was this review helpful to you?

April 27, 2021

Bottom paint
By Colin from Philadelphia

Verified Purchase

I have used Underdog for 4 years, sailing in the fresh water Delaware River, saltwater Delaware Bay in the Chesapeake. I have had a few barnacles in saltwater but mostly slime, and a very light slime in fresh water. A quick swipe with a power washer wand and the hull is clean at winter haulout. Underdog goes on smooth, just remember to mix the can well before using as there is some separatiuon of solids and liquids.

Bottom Line Yes, I would recommend to a friend

Was this review helpful to you?

April 23, 2021

It's half the price of the other stuff
By Boat Diddley from Chicago

Verified Purchase

Works

Bottom Line Yes, I would recommend to a friend

Was this review helpful to you?

April 12, 2021

Worked well
By Giggles from Eastern shore MD

Verified Purchase

Bottom looked great after a season in brackish water in MD. A lot of barnacles on running gear, but not on paint. Great price, especially with the extras in the kit.

Bottom Line Yes, I would recommend to a friend

Was this review helpful to you?

March 31, 2021

Bottom care
By Reelman from Dahlgren Va.

Verified Purchase

Priced right very effective and all in one pkg.

Bottom Line Yes, I would recommend to a friend

Was this review helpful to you?

November 13, 2020

Recomended
By Pedro Franco from Miamia, Fl

Verified Purchase

Excelent product and excelent atention

Bottom Line Yes, I would recommend to a friend

Was this review helpful to you?

November 11, 2020

There are better options
By UrsaMinorP from Bridgeport, CT

I don't have a whole lot to compare this to, but I've used others and this was by far the least effective ... spend a little more, get a lot more.

Bottom Line No, I would not recommend to a friend

Was this review helpful to you?

July 9, 2020

Underdog Bottom Paint
By Cal27 from Portsmouth, RI

Verified Purchase

Have used for several years. Works as advertised. Xylene works well for a thinner. A good value.

Bottom Line Yes, I would recommend to a friend

Was this review helpful to you?

June 16, 2020

Excellent product
By Mick from LBI New Jersy

Verified Purchase

The box came with everything you need to paint included.

Bottom Line Yes, I would recommend to a friend

Was this review helpful to you?