Pettit Neptune HRT water based boat bottom paint replaces Neptune5
Pettit Z-Spar Pettit marine paint
  • Pettit Neptune HRT water based boat bottom paint replaces Neptune5

Pettit Neptune HRT Water-Based Antifouling Paint

Neptune HRT is a new water-based antifouling paint that replaces Pettit Neptune 5. User-friendly low VOC formula features soap and water cleanup and no strong solvent smell, making Neptune HRT ideal for marinas under restrictions.

Hybrid Reactive Technology formula utilizes high-density biocide and film modifiers for better color consistency, less yearly build-up (less sanding), and lower finish weight, while providing a smoother finish than traditional paints. Hybrid formula combines the durability of a hard finish with the antifouling protection of an ablative. 25% Copper content ensures reliable performance.

For use on properly prepared fiberglass, wood, and steel hulls. Do not use on aluminum. Neptune HRT is compatible over almost all other antifouling paints.

Available in Quarts and Gallons in Black, Blue, Red, or Green.

$40.99 / qt
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Tech Spec Product Info User Generated Content

Neptune HRT Features:

  • Water-based antifouling paint with 25% cuprous oxide
  • Smooth, durable, self polishing hybrid formula effective on both power and sailboats
  • Low VOC means no nasty solvent odors or fumes; cleans up with soap and water
  • No sanding between coats required - saves time and money
  • Haul and relaunch without re-painting
  • Compatible over most bottom paints
  • Replaces Pettit Neptune 5


Pettit Neptune HRT is a hybrid antifouling paint that provides the toughness of a hard paint with the protection against all types of fouling you get from a seasonal ablative. It can be applied over all previously painted surfaces, and resists buildup after repeated applications.

This cost-effective water based paint is easy to apply and requires no sanding between coats, saving you time. Unlimited dry time to launch means you can paint today and launch whenever you want. You can even haul and relaunch without losing effectiveness. Eco-friendly Neptune HRT has no harsh solvent odors, so you can paint indoors, and cleanup is easy with soap and water.

Finish:  Flat 
Solids by Volume:  60%  
Solids by Weight:   40% 
Coverage:  500 ft2 /gal.  
VOC:   145 grams/liter (1.21 pounds/gallon)  
Biocide:  Cuprous Oxide 25.25% 
Flash Point:  > 200℉ 
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℉ Min. / 90℉Max.  
Thinner:  Water 
Dry Time  To Touch  To Recoat  To Launch 
90℉  15 mins  1-1/2 hrs  6 hrs 
70℉  30 mins  3 hrs  10 hrs 
50℉  1 hr  6 hrs  16 hrs 
BRAND: Pettit Z-Spar
Type: Copper AF Paint
5.0 2

I would by this product again.


Touched bottom of my boat before going back in the water.


Rhode Island


Petit Protection ans water clean up.


a paint to help save the environment


New York


Pettit Neptune HRT Water-Based Antifouling Paint



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