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Interlux Fiberglass Bottomkote NT

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Starting At $39.83


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Interlux Paint
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SKUContainer SizePaint ColorRetail PriceOur PriceSavings 
ILX-YBB-349GGallonRed$155.74$90.33You Save 42%
ILX-YBB-349QQuartRed$59.45$39.83You Save 33%
ILX-YBB-359GGallonGreen$155.74$90.33You Save 42%
ILX-YBB-359QQuartGreen$59.45$39.83You Save 33%
ILX-YBB-369GGallonBlue$155.74$90.33You Save 42%
ILX-YBB-369QQuartBlue$59.45$39.83You Save 33%
ILX-YBB-379GGallonBlack$155.74$90.33You Save 42%
ILX-YBB-379QQuartBlack$59.45$39.83You Save 33%

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 continueously smooths with use, providing a fast, fuel efficient coating
  • Fast drying
  • Universal, a cost effective choice for all power and sail boats in all waters. 

Sold in Gallons and Quarts with following SKU's:

  • Gallons:                                              Quarts:
  • Black (ILX-YBB-379G)                     Black (ILX-YBB-379Q)
  • Blue (ILX-YBB-369G)                       Blue (ILX-YBB-369Q)
  • Green (ILX-YBB-359G)                    Green (ILX-YBB-359Q)
  • Red (ILX-YBB-349G)                        Red (ILX-YBB-349Q)


  • Finish: Matte
  • Coverage: 400 sq. ft/gal.
  • Number of Coats: 2 minimum



Product Specifications

Manufacturer Interlux Paint
Manufacture Part Number YBB-349G, YBB-349Q, YBB-359G, YBB-359Q, YBB-369G, YBB-369Q, YBB-379G, YBB-379Q
UPC 081948000345, 081948000352, 081948000369, 081948000376, 081948000383, 081948000390, 081948000413, 081948000420
Number of Seasons Single Season
Hull Material Fiberglass, Steel, Wood
Is Boat Trailerable Trailerable

How To Apply

APPLICATION DATA METHOD: Roller, Brush, Airless Spray, or Conventional Spray


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

PREVIOUSLY PAINTED SURFACES: In Good Condition Remove all traces of loose paint and contamination by sanding the entire surface with 80 grit wetor-dry sandpaper; wipe surface clean with Special Thinner 216. Apply at least 2 coats of Fiberglass Bottomkote® NT. In Poor Condition Completely remove all old antifouling paint using Interstrip 299E for fiberglass and wood, and by sandblasting to near white metal for steel. Follow application systems below.

BARE FIBERGLASS: It is very important that bare fiberglass be properly prepared to prevent delamination of the antifouling paint. Remove mold release wax using one of the following Interlux products, Fiberglass Surface Prep YMA601 or Fiberglass Solvent Wash 202 following the product label instructions. Fill any surface imperfections with Interlux Watertite YAV135 following the label instructions. After the surface has been properly cleaned, follow one of the application systems below.

BARE FIBERGLASS - NO SANDING SYSTEM Clean the surface following the preparation procedure above. Apply one coat of Interlux Interprotect 2000E or Fiberglass No-Sand Primer following the label instructions or product datasheet for applying the primer and overcoating with antifouling paint. Apply two coats of Fiberglass Bottomkote® NT allowing appropriate drying times.

BARE FIBERGLASS - SANDING SYSTEM Clean the surface following the preparation procedure above. Sand entire surface well with 80 grade (grit) paper until flat matte finish is obtained. Remove sanding residue and wipe with Fiberglass Solvent Wash 202. Sand and wipe clean. Apply two coats of Fiberglass Bottomkote® NT allowing appropriate drying times.

BARE WOOD: Sand with 80 grade (grit) sandpaper and remove sanding residue with Special Thinner 216. 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 two or more coats of Fiberglass Bottomkote® NT unthinned, allowing for the appropriate dry times.

UNDERWATER METAL PARTS: Contact the Interlux Technical Service Department at 1-800-468-7589 for full information on how to properly prime underwater metals. More systems and information available of www.yachtpaint.com. Do not use on aluminum.


APPLICATION INFORMATION: For use on fiberglass, wood or properly primed steel and lead. It is very important that bare fiberglass be properly primed to prevent delamination of the antifouling paint. At least 2 coats should be applied. Do not apply when temperature is below 10°C/50°F. Thin only if necessary. Thin no more than 10%. Use Brush-Ease 433 if roller or brush drags during application.  Airless Spray Tip Size: 0.53-0.66 mm/21-26 thou. Pressure: 170-204 bar/2500-3000 psi. Conventional Spray Pressure Pot: Tip Size: 1.8-2.2 mm/70-85 thou. Pressure: 4.08-4.76 bar/60-70 psi (gun pressure); 10-15 psi (pot pressure). Roller Use a 3/8" nap solvent resistant roller. Take care to apply all the paint calculated even if it means applying an extra coat. Do not apply thin coats. Spraying of antifouling paints is prohibited in Canada. Apply to clean, dry, properly prepared surfaces only. Suitable for fiberglass, wood and painted surfaces. Do not apply over tin-based copolymer antifouling paints. Do not use under vinyl based antifouling paints such as VC Offshore or Baltoplate.


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