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Pettit Hydrocoat ECO Antifouling Bottom Paint

$122.49Limited StockSee Product Details
Pettit Hydrocoat Eco Bottom Paint
Pettit Hydrocoat Eco Bottom Paint Color Chart

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Product Details

Pettit Hydrocoat Eco is a water-based, copper-free ablative bottom paint. It contains the highest level of metal-free biocide Econea on the market and uses a powerful slime fighting inhibitor to provide multi-season protection in any marine environment.

Pettit uses their Hydrocoat Technology to replace the harsh solvents found in most bottom paints with water. The water-base formula makes for easy application and even easier cleanup with soap and water. Pettit's innovative technology lowers the amount of VOCs and eliminates the strong smell of solvents.

The copolymer ablative antifouling film wears away with use, controlling the release of biocides and eliminating the build up of paint and the need to sand between coats. The copper free formula can be applied over almost all bottom paints and is safe for use on any substrate including steel and aluminum.

These water-based antifouling paints are available in five colors: black, blue, green, red, and white. Black is available in Quart and Gallon while all other colors are available in Gallon only.

Tech Specs
Dry Time at Substrate Temperature To Touch To Recoat To Launch
90°F1/4 hour1.5 hours12 hours
70°F1/2 hour3 hours16 hours
50°F1 hour6 hours48 hours
Info & Guides

Hydrocoat Eco contains biocides. As a result, there is a tendency for settling to occur, especially if the paint has been on the shelf for several months. It is necessary to thoroughly mix the paint before using. If possible, shake the can of paint on a mechanical paint shaker. Before using, check the sides and bottom of the can to make sure all the pigment has been mixed in. If mixing is going to be done with a wooden paddle or an electric drill mixer, pour off half of the liquid from the top of the can into another can and then properly mix in any settled pigment; then remix the two parts together thoroughly. Adhere to all application instructions, precautions, conditions, and limitations to obtain optimum performance. Refer to individual labels and tech sheets for detailed instructions when using associated products, etc. When spraying, do not thin Hydrocoat Eco more than 10% (12 ounces per gallon) or inadequate paint film thickness will occur and premature erosion of the finish will be likely.

Surface Preparation: Coating performance, in general, is proportional to the degree of surface preparation. Follow recommendations carefully, avoiding shortcuts. Inadequate preparation of surfaces will virtually assure inadequate coating performance.

Maintenance: No antifouling paint can be effective under all conditions of exposure. Man made pollution and natural occurrences can adversely affect antifouling paint performance. Extreme hot and cold water temperatures, silt, dirt, oil, brackish water, and even electrolysis can ruin an antifouling paint. Therefore, we strongly suggest that the bottom of the boat be checked regularly to make sure it is clean, and that no growth is occurring. Lightly clean the bottom with a soft cloth or sponge to remove any growth or contaminants from the antifouling paint surface. Cleaning is particularly important with boats that are idle for extended periods of time. The self-cleaning nature of the coating is most effective when the boat is used periodically. Burnishing of the surface to create a slicker finish should be done with 400-600 grit wet-or-dry paper after the coating has dried for seven (7) days.


Hydrocoat Eco is very easily applied by brush, roller or spray. When rolling, the following technique will help ensure a smoother finish: Thin the paint approximately 5-10% with clean fresh water. Wet the surface to be painted thoroughly with clean fresh water as well. This aids the "hold out" of the coating, resulting in a truer color and smoother finish. Slight variations in color and surface texture are not uncommon and should not be viewed with dismay. The painted surface becomes smoother once in the water and any mottling of the color will diminish as well.

Previously Painted Surfaces: To paint old, hard antifoulings, thoroughly wipe down the surface with 120 Brushing Thinner, paying particular attention to waterline areas, then sand painted surface with 80 grit sandpaper. Wipe clean of sanding residue with water and apply Hydrocoat Eco. Old tin or copper copolymers or Teflon based antifoulings should be sanded thoroughly with 80 grit sandpaper to remove the chalky outer surface, wiped clean of sanding residue, and then may be over coated directly with Hydrocoat Eco. Traditional, soft antifoulings should be removed before applying Hydrocoat Eco.

Bare Fiberglass: All bare fiberglass, regardless of age, should be thoroughly cleaned with 92 Bio-Blue Hull Surface Prep or de-waxed several times with Pettit D-95 Dewaxer or 120 Brushing Thinner. Sand thoroughly with 80 grit sandpaper to a dull, frosty finish and rewash the sanded surface with 120 Brushing Thinner to remove sanding residue. Then apply two or three coats of Hydrocoat Eco, following application instructions. Careful observation of the above instructions will help ensure long term adhesion of this and subsequent years' antifouling paint.

To eliminate the sanding operation, prep the surface with 92 Bio-Blue Hull Surface Prep or wash the fiberglass three times using Pettit 95 Dewaxer only. Then apply one thin coat of Pettit 6998 Skip-Sand Primer. Use a 3/16" or less nap when applying by roller. Consult the primer label for complete application and antifouling top coating instructions. Apply two or three coats of Hydrocoat Eco.

Easy 2-Step Sandless Method - Thoroughly clean and prep hull using 92 Bio-Blue and a Scotch-brite pad as described above. Make sure that the entire surface has a dull, frosty finish. Wipe surface to remove any excess moisture and apply two coats of Hydrocoat Eco.

Barrier Coat: Fiberglass bottoms potentially can form osmotic blisters within the gelcoat and into the laminate. To render the bottom as water impermeable as possible, prepare the fiberglass surface as mentioned above (sanding method) then apply three coats of Pettit Protect 4700/4701 High Build Epoxy Primer per label directions. Apply two or three finish coats of Hydrocoat Eco.

Blistered Fiberglass: See Pettit Technical Bulletin TB-1000 Gelcoat Blister Repair and Prevention Specification for detailed instructions.

Bare Aluminum: Sandblast to clean, bright metal and remove blasting residue with clean, dry compressed air or a clean brush. Immediately apply three coats of Pettit 4400/4401 Aluma Protect Epoxy Primer followed by two finish coats of this product. Read and follow carefully the instructions on the Pettit 4400/4401 Aluma Protect Epoxy Primer label. If the surface to be painted is smooth aluminum, apply one coat of 6455/044 Metal Primer and allow to dry for 2 hours, then apply two finish coats of this product. Read and follow carefully the instructions for application and top-coating on the 6455/044 primer label.

Bare Wood: Sand entire surface with 80 grit paper; wash clean with 120 Brushing Thinner. Apply a coat of Hydrocoat Eco thinned 25% with 120 Brushing Thinner, allow an overnight dry, lightly sand and wipe clean. Apply two finish coats of Hydrocoat Eco. Any metal parts must be primed before applying the bottom paint.

Steel Hulls: To remove loose rust and scale from the metal surface, scrape, sandblast or wire brush. Solvent clean the surface to remove grease and dirt then apply one or two coats of Pettit 6980 Rustlok* followed by two coats of Pettit 4700/4701 High Build Epoxy Primer. Follow with Hydrocoat Eco.

Underwater Metal Parts: Abrade to clean bright metal by scraping, sandblasting or wire brushing. Solvent clean and apply one thin coat of Pettit 6455/044 Metal Primer*. Let dry two hours and apply two coats of Pettit 6627 Tie Coat Primer*. Let the second coat of 6627 Tie-Coat Primer dry at least four hours and apply Hydrocoat Eco.

*These are simplified systems for small areas. Please consult your Pettit representative or the Pettit Technical Department for more complex, professional systems. Always read the labels or tech sheets for all products specified herein before using.

Technical Information


  • Water based, copper free, self polishing ablative antifouling paint.
  • Dual-biocides provide outstanding multi-season protection in all conditions.
  • Uses the power of organic Econea for better protection and a greener earth.
  • Co-polymer ablative technology eliminates sanding and paint build up.
  • Easy application and cleanup with soap & water.
  • Will not lose effectiveness when removed from the water.
  • Use water to thin if necessary.


  • Vehicle Type: Water-Based Emulsion
  • Finish: Flat
  • Components: 1
  • Curing Mechanism: Solvent Release
  • Solids By Weight: 73° +/- 2° (theoretical)
  • Solids By Volume: 40° +/- 2° (theoretical)
  • Coverage: 430 sq. ft/gal
  • VOC: 150g/l max. (1.25 lbs/gal)
  • Active Ingredients: 6% Econea (Tralopyril); 4.8% Zinc Pyrithione
  • Flash Point: None
  • Application Method: Brush, roller airless or conventional spray.
  • Number of Coats: 2 minimum with additional coat at waterline recommended.
  • Dry Film Thickness Per Coat: 1.4 mils (4.0 mils per wet coat)
  • Application Temperature: 50°F minimum temp. & 90° maximum temp.
  • Thinner: Water

Reviews for Pettit Hydrocoat ECO Antifouling Bottom Paint

10 of 15 Reviews

May 9, 2023

Ablative paint in fresh water
By PY from Lake Michigan

Verified Purchase

Purchased my Pursuit 235 OS with this product already on the bottom. Performance last season was as expected. I lightly sanded bottom and applied two coats to those areas I could reach while on trailer. No application problems and result looks good. My only advise is, prior to beginning, you need to either have the paint mixed on a professional shaker or have a mixing tool which you attach to a drill as paint is very thick upon opening. No way you can mix effectively by hand without killing yourself.

Bottom Line Yes, I would recommend to a friend

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October 5, 2022

Best Bottom Paint Around!
By Danester from Satfford Virginia

Verified Purchase

Protects while keeping your hull beautifil new and ready for the seasons!

Fresh paint before every Spring launch- just wash old paint and apply new coat
Kept in water from early Spring to late Fall
Bottom after 5 months in the slip
Bottom Line Yes, I would recommend to a friend

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April 7, 2022

Easy to use
By Rob from Middle bay MD

Verified Purchase

Great product my bottom just needed pressure washing and slight scrub in the spring and she's ready for paint

Bottom Line Yes, I would recommend to a friend

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August 10, 2021

Great Product
By Helenwheels from Cape Cod

Verified Purchase

Easy to use and works. Especially the black. I painted my boat bottom with black and white stripes with this product, over a fresh Interlux barrier primer. At the end of the season the white stripes had mostly worn off and been replaced by a scary array of marine life. The black stripes were as clean as the day I painted them. Next season I mixed the remaining black and white for a medium gray. The two had a reaction, forming a thick fast drying glop that was hard to apply. Sanding between coats made it ok. Turned out to be the best bottom paint ever. Hard as a rock and nothing grew on it. Wanted to continue the experiment this year but the high cost of paint stopped me. Went with the black and it's perfect. I highly recommend this product. Better for the environment and better for you!

Fresh paint
End of season - already cleaned off the growth, but still shows black paint works better.
Bottom Line Yes, I would recommend to a friend

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June 22, 2020

My favorite bottom paint
By AnnapolisMarineServices from Annapolis, MD

Verified Purchase

This is one of the best bottom paints I have used. It lasts over one season and growth just slides off. Also eco friendly and their green color is unique and tropical looking.

Bottom Line Yes, I would recommend to a friend

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June 2, 2020

Great stuff, but hard to mix
By Kimo from South Coast MA

Verified Purchase

This is my first season for personally applying this bottom paint on an Albin 28 that is new to us. Previous owner had the yard use it in 2018, and the bottom condition was not bad, so we stayed with the program. Instructions on the can say to mechanically mix if at all possible. Believe it! This stuff is chock full of solids. My day for doing the painting was a Sunday, in the middle of the Covid-19 lockdown, and I'd had it shipped to me. I didn't have an electric drill mixer, and no handy paint store nearby, just stir sticks. So, stir I did, stir, stir, stir and stir some more, for one an hour. So, my bad I guess. Now the next test will be to see if we can go a couple of seasons on Buzzards Bay.

Bottom Line Yes, I would recommend to a friend

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April 21, 2020

I would buy this product again
By John p from Point pleasant nj

Verified Purchase

Excellent paint. No odor. Paint was a bit clumped bottom of can

Bottom Line Yes, I would recommend to a friend

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October 30, 2019

Paint Performed Badly
By mbato from Greenport NY

After stripping down to fiberglass this spring, I applied the Petit Hydrocoat over Interlux InterProtect 2000E Barrier Coat Epoxy Primer as instructed. Upon haul, the keel is covered in growth. Really disappointing after so much work, and especially hoping to find a less toxic alternative to copper.

Lots of growth
This is even after being brushed off two months ago
Bottom Line No, I would not recommend to a friend

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October 17, 2019

great stuff
By d-bottom from manasuan nj.

used this season with stellar results no stink,easy clean up boat is in Manasquan NJ. salt water. no growth no barnacles

Bottom Line Yes, I would recommend to a friend

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July 14, 2019

Paint that was fresh
By David from Mathews, Va

Verified Purchase

fresh. Bottom paint was as it should be, fresh with no settlement. I learned my lesson do not buy from places that advertise low discounted prices, you will get left over paint that has been sitting around and no amount of stirring or shaking get rid of the lumps.

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