Pettit Unepoxy HRT Bottom Paint

Pettit Unepoxy HRT Bottom Paint

Pettit Unepoxy HRT is formulated to provide outstanding protection at a very affordable price. Unepoxy HRT has a smooth durable finish that is able to withstand beaching, trailering, and season long abuse. This antifouling paint uses the latest technology available to create a hybrid paint film that's strong enough to handle the tough marine environment without building up over time.

HRT: Hybrid Reactive Technology features high density biocide utilization to maximize effectiveness, along with film modifiers to reduce yearly build-up, maintain color consistency, and lower weight.  

Key Features:

• Seasonal antifouling
• Economical hybrid protection
• Smooth durable polishing finish
• Compatible over most bottom paints
• Durable finish withstands beaching, trailering, and season long abuse

Colors Available: 1211 Blue, 1311 Green, 1611 Red, 1811 Black

How Much Pettit Unepoxy HRT Do I Need for My Boat?

Refer to the chart below to calculate how much Unepoxy HRT paint you will need for your boat.

1. Calculate the square footage of the hull to be painted - multiply the length of the hull by the beam then multiply that total by .85
2. Divide that number (your square foot total) by the amount of coverage Unepoxy HRT provides. (500 square foot per gallon). This will give you a one-coat total.

Example: If your boat has a length of 28', and a beam of 8.5', you will multiply 28 x 8.5 x .85 to get your total square footage. The total square footage for this boat is 202.3 square feet. A gallon of Unepoxy HRT has a coverage of 500 square feet per gallon for one coat, so one gallon will be enough for two coats.

How to Apply Pettit Unepoxy HRT

Unepoxy HRT is easily applied by brush, roller, or spray. When rolling, use only a high-quality short nap roller cover. Apply using thin coats. For the smoothest possible finish, thin the paint approximately 5-10% using 120 Brushing Thinner. Unepoxy HRT has a tendency for settling to occur, especially if the paint has been on the shelf for several months. Thoroughly mix the paint before using. Before using, check the sides and bottom of the can to make sure all the pigment has been mixed in.

• Finish: Flat
• Coverage: 500 ft2/gal
• Application Method: Brush, roller, airless or conventional spray
• Maximum Roller Thickness: 3/16"
• Number of Coats: 1 minimum per season with additional coat at waterline
• Wet Film Thickness: 3.75 mils
• Dry Film Thickness: 1.5 mils
• Application Temp: 50°F Min. / 90°F Max
• Thinner: 120 Brushing Thinner

**Do not apply Unepoxy HRT on aluminum hulls or outdrives**

Previously Painted Surfaces

• For old hard and ablative bottom paints, begin by thoroughly wiping down the surface with 120 Brushing Thinner. Pay extra attention to waterline areas. Then sand the painted surface with 80 grit sandpaper.
• Old tin or copper copolymers, or Teflon-based antifouling paints should be sanded thoroughly with 80 grit sandpaper to remove the chalky outer surface. Wipe clean ten apply one coat of Unepoxy HRT.
• Soft, sloughing antifouling paints should be removed before applying Unepoxy HRT.

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.

Non-Sanding Method (1): Prep the surface with 92 Bio-Blue Hull Surface Prep or wash the fiberglass three times using Pettit D95 Dewaxer. 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 thin coats of Unepoxy HRT.

Non-Sanding Method (2): Thoroughly clean, de-wax and etch the surface with 92 Bio-Blue Hull Surface Prep using a course Scotch-Brite pad in a swirling motion. Thoroughly rinse all residue from surface and let dry. Then apply one coat of Pettit-Protect High Build Epoxy Primer. Consult the primer label for complete application and antifouling top coating instructions. Apply two thin coats of Unepoxy HRT.

Bare Wood

• Bare wooden hulls should be sanded thoroughly with 80 grit sandpaper and wiped clean of sanding residue.
• Apply a coat of 6627 Tie-Coat Primer thinned 25% with 97 Epoxy Thinner directly to the bare wood. Allow 4 hours to dry.
• Apply two un-thinned coats of Unepoxy HRT.

Steel Hulls

• Clean surface to remove grease a dirt; remove loose rust and scale from the metal surface.
• Scrape, sandblast or wire brush to 2-3 mil profile. Blow off residue.
• Apply one or two coats of Pettit 6980 Rustlok Primer followed by two coats of Pettit 4700/4701 High Build Epoxy Primer.
• Follow with Unepoxy HRT.

Underwater Metal Parts

• Solvent clean then abrade to clean bright metal by sanding with 60-80 grit sandpaper, sandblasting or wire brushing.
• Apply 2-3 coats of Prop Coat Barnacle Barrier 1792.
• Apply 2 thin coats of Unepoxy HRT.

Above information sourced from Pettit's Unepoxy HRT Bottom Paint Application Instructions

Click to Download Pettit Unepoxy HRT Bottom Paint Application Instructions

Frequently Asked Questions

What is Pettit Unepoxy HRT Bottom Paint used for?

Pettit Unepoxy HRT is a seasonal antifouling bottom paint designed to provide hybrid protection in the marine environment. Its durable polishing finish is formulated to withstand beaching, trailering, and season-long use while helping reduce yearly paint buildup. It is available in Blue, Green, Red, and Black and is not intended for aluminum hulls or outdrives.

How many coats of Pettit Unepoxy HRT should I apply?

Apply at least one coat per season, with an additional coat at the waterline. The application instructions also specify two thin coats for certain bare fiberglass and metal preparation systems. Follow the applicable surface-preparation instructions for your hull material and existing coating.

How much Pettit Unepoxy HRT do I need for my boat?

Unepoxy HRT covers approximately 500 square feet per gallon for one coat. To estimate the hull area, multiply the boat's length by its beam and then multiply that result by 0.85. Divide the resulting square footage by 500 to determine the approximate amount needed for one coat.

Can Pettit Unepoxy HRT be applied over existing bottom paint?

Yes. Unepoxy HRT is compatible over most bottom paints when the existing coating is properly prepared. Hard and ablative paints should be cleaned and sanded, while soft, sloughing antifouling paints should be removed. Old tin, copper copolymer, and Teflon-based antifouling coatings should be thoroughly sanded before application.

What surfaces can Pettit Unepoxy HRT be applied to?

The application instructions provide systems for bare fiberglass, bare wood, steel hulls, and underwater metal parts, as well as previously painted surfaces. However, Unepoxy HRT should not be applied to aluminum hulls or outdrives. The required preparation and primers vary by substrate, so use the instructions for the specific surface being coated.

What are the application temperature and coverage specifications for Pettit Unepoxy HRT?

Pettit Unepoxy HRT can be applied by brush, roller, airless spray, or conventional spray at temperatures from 50°F to 90°F. It covers approximately 500 square feet per gallon, has a 3.75-mil wet film thickness and 1.5-mil dry film thickness, and can be thinned approximately 5-10% with Pettit 120 Brushing Thinner for a smoother finish.

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