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Interlux Fiberglass Bottomkote NT

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List Price: $48.99
Starting At: $40.95
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Interlux Fiberglass Bottomkote NT Antifouling Marine Paint

Interlux Fiberglass Bottomkote NT uses a dual resin technology that provides a universal durable, fast dry antifouling paint that delivers the benefits of both hard and ablative antifouling paints for use on all power and sail boats. The universal formula of Fiberglass Bottomkote NT has durability of a traditional hard paint but has a slow polishing mechanism built-in that continuously smoothes and renews the active surface avoiding the heavy build-up of paint layers much like an ablative paint. The fast dry formula allows the boat to be painted and launched in the same day. Fiberglass Bottomkote NT provides clean stable colors for effective season-long protection. Fiberglass Bottomkote NT is recommended for use on the underwater areas of fiberglass, wood, and properly primed metal (except aluminum) boat hulls. It can be used in fresh, salt and brackish waters.


  • Dual resin approach optimizes the benefits of hard and ablative paints.
  • Surface continuously smooths with use, providing a fast, fuel efficient coating
  • Fast drying - paint & launch on the same day
  • Universal, a cost effective choice for all power and sail boats in all waters. 


  • Finish: Matte
  • Coverage: 400 sq. ft/gal.
  • Number of Coats: 2 minimum
  • VOC: 449 g/lt - maximum
  • Pack Size: 1 US Quart, 1 US Gallon
  • Colors Available: YBB349 Red, YBB359 Green, YBB369 Blue, YBB379 Black

Associated Products:

Special Thinner 216 - For thinning or surface prep

Brush-Ease 433 - For thinning or surface prep

InterProtect 2000E - Universal primer for above & below waterline

How To Apply Fiberglass Bottomkote NT

Interlux Fiberglass Bottomkote NT can be applied over most other antifouling paints provided the old coating is tightly adhered and is in sound condition. Fiberglass Bottomkote NT can be applied on fiberglass, wood, or properly primed steel and lead. Do not apply over tin-based copolymer antifouling paints. At least 2 coats should be applied. Prior to application, the paint should be stirred or shaken thoroughly. 

  • Application Methods: Roller, Brush, Airless Spray, or Conventional Spray
  • Number of Coats: 2
  • Dry Film Thickness per Coat: 2 mils (4.1 wet mils)
  • Coverage: 400 sq. ft/gal.
  • Application Temp: 50°F Min. / 95°F Max.
  • Thinner: Special Thinner 216 or Brush-Ease 433
Temp To Touch To Recoat To Launch
95°F 1/2 HR 1 HR 3 HR
75°F 1 HR 2 HR 6 HR
60°F 2 HR 4 HR 10 HR

Surface Preparation & Application

  • Previously Painted Surfaces (Good Condition)
  • Previously Painted Surfaces (Poor Condition)
    • Completely remove all old antifouling paint using Interstrip 299E for fiberglass and wood.
    • For steel, sandblast to near white metal.
    • Follow the appropriate application systems below.
  • Bare Fiberglass
    • Remove mold release wax and other contamination in order to ensure that the antifouling paint properly adheres to the substrate.
    • Remove mold release wax using either Fiberglass Surface Prep YMA601V or Fiberglass Solvent Wash 202.
    • Fill any surface imperfections with Interlux Watertite YAV135.
    • After the surface has been cleaned, follow one of the Fiberglass application systems below.
  • Bare Fiberglass - No Sanding System
    • Clean the surface with Fiberglass Surface Prep YMA601V.
    • Apply one coat of Interlux InterProtect 2000E.
  • Bare Fiberglass - Sanding System
    • Sand entire surface well with 80 grit paper until flat matte finish is obtained.
    • Remove sanding residue.
    • Apply two coats of Fiberglass Bottomkote NT allowing appropriate drying times.
  • Bare Wood
    • Sand with 80 grit paper, then remove sanding residue.
    • Apply the first coat of Fiberglass Bottomkote NT thinned 10% with Special Thinner 216 or Brush-Ease 433.
    • Fill seams with Interlux Seam Compound 30 (if necessary)/
    • Apply 2 or more coats of Fiberglass Bottomkote NT unthinned, allowing for appropriate dry times.

Application Tips

  • Thin only if necessary and do not thin more than 10%.
  • For airless spray, use tip size 0.53-0.66 mm/21-26 thou. Use pressure 170-204 bar/2500-3000 psi.
  • For conventional spray, use pressure pot tip size 1.8-2.2 mm/70-85 thou. Use pressure 4.08-4.76 bar/60-70 psi (gun pressure), 10-15 psi (pot pressure).
  • For roller application, use a 3/8" nap solvent resistant roller.

pdficon.pngClick here to download Interlux Fiberglass Bottomkote NT Datasheet

California Residents: warning sign WARNING Cancer and Reproductive Harm -




Google Product Type:
Google Custom Field 2:
Paint Type:
Ablative Antifouling
Number of Seasons:
Single Season
Antifouling Type:
Copper Based
Is Boat Trailerable:
Hull Material:
Fiberglass, Steel, Wood
Water Type:
Brackish Water, Fresh Water, Salt Water
Rebate Center:
Rebate Available
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