AF-33 Antifouling Paint

AF-33 Antifouling Paint image number null
AF-33 Antifouling Paint image number null

AF-33 Antifouling Paint

3.4 out of 5 Customer Rating
  • Select Styles for Availability
Fulfilled by Vendor, typically 2-3 weeks.

Vendor Shipping Details

This item will be fulfilled from the vendor. Delivery time varies – typically 2–3 weeks.

Restrictions: This item does not ship to a PO Box, APO, FPO, DPO or international address. Expedited shipping is not available.

West Marine will email you when your order ships from the vendor.

$159.99 - $160.99
This item is currently unavailable.
Enter your email address to be added to the waitlist.
Model # P018194035
Truck Freight

Truck Freight is used to ship items that exceed standard shipping limitations on weight and/or size. Delivery is only applicable within the contiguous United States. Additional shipping fees apply. Signature required for receipt of shipment.

Warning Hazard shipping
Item Can only Ship to Store
Frequently Bought Together

AF-33 provides multi-season antifouling protection at a single-season price.

As a harder ablative paint, AF-33 slowly wears away with use. This offers several advantages over hard, epoxy paints. First, the slow wearing nature of AF-33 results in minimal paint build-up, which minimizes the need for sanding at haulout. Second, as AF-33 wears away, fresh biocide is released for unbroken antifouling effectiveness. Lastly, as AF-33 wears away, it self polishes, which reduces drag and boosts fuel efficiency. Not for sale in States where prohibited by law.

AF-33 is a good choice for recreational powerboats, sailboats, fishing vessels, tugs, barges, ferries, crab traps and other objects that need to remain free of fouling. AF-33 can be applied to fiberglass, wood and properly primed steel hulls. Do not apply on aluminum hulls. Offered in Red, Blue, Dark Blue, Black and Green. Not for sale in States where prohibited by law.

Key Features

  • Harder, self-polishing copolymer ablative 
  • Can be applied to all types of hulls
  • Also suitable for crab traps and other objects 
  • Self-polishing formula reduces paint build-up 
  • Not for application on aluminum hulls

Physical Data

  • Type: Copolymer ablative
  • Finish: Semi-gloss
  • Available Colors: Dark Blue, Green, Teal, Red, Light Blue, Black
  • Components: 1
  • Curing Mechanism: Solvent release
  • Solids by Volume: 56% +/- 2%
  • Coverage (Theoretical): 359sq.ft. @ 2.5 mil. (DFT)
  • VOC: 398g/l max.
  • Active Ingredients: 33.6% cuprous oxide
  • Additives: Pint of Biocop TF may be added for dual-biocide protection
  • Flash Point: 100°F


  • Application Method: Airless and conventional spray; Solvent-resistant brush or 3/8" nap roller
  • Number of Coats Recommended: 2-3
  • Wet Film Thickness/Coat (Recreational Boats): 4.5mil.
  • Dry Film Thickness/Coat (Recreational Boats): 2.5mil.
  • Wet Film Thickness/Coat (Commercial Boats): 5.4-8.9mil.
  • Dry Film Thickness/Coat (Commercial Boats): 3.0-5.0mil.
  • Thinner: Sea Hawk 2033, 2035

Drying Times:

Drying @73°F @95°F
To touch 2 hr. 1 hr.
To recoat (min.) 1 hr. 1 hr..
To recoat (max.) Not critical Not critical
To launch 12 hr. 12 hr.

*The above dry times are minimums. May be recoated after the minimum time shown. There is no maximum dry time before launching.

Get the right amount of paint:

Note: The following recommendations are for two coats of paint. All values are approximate

Boat Type Bottom Paint
10' Dinghy 1 qt.
14' Outboard 1-2 qt.
18' Runabout 2 qt.
20' Sailboat 3 qt.
24' Runabout 3-4 qt.
30' Sailboat 1.5 gal.
32' Cruiser 1.5-2 gal.
36' Auxiliary 2 gal.
40' Cruiser 2.5 gal.
45' Sailboat 3-3.5 gal
50' Sportfisher 4+ gal.

Another way to determine bottom paint quantity is to estimate the approximate surface area of the hull below the waterline, using the following formula:

Length x Beam x .75 = Approximate underwater surface area in square feet.

Each paint has a “theoretical coverage” area, but most paints require at least two coats, so you can expect actual coverage to be no greater than half of the theoretical value.

More information

For detailed application instructions, see the AF-33 Data Sheet. NOTE: Manufacturer data sheets are subject to revision. Linked data sheets are believed to be accurate at the time of publication.