Interlux - Fiberglass Bottomkote NT Gallon

InterluxSKU: O 2282
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Color: Black
Sale price$129.99 Regular price$159.99
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Fiberglass Bottomkote NT (New Technology) is formulated with unique Dual Resin Technology, providing the benefits of both hard and ablative antifoulings. Combines durability, preventing premature wear-through, with slow polishing, ensuring consistent antifouling performance and a smooth finish.


Fiberglass Bottomkote® NT (New Technology) is formulated with a unique, Dual Resin Technology that allows a boat owner to benefit from the advantages of both ablative and hard antifouling paints. Fiberglass Bottomkote® NT is a very durable coating, preventing premature wear-through, yet it has a slow polishing effect that keeps the hull clean & smooth without the heavy paint build-up you can get year after year with a traditional hard antifouling. With it's fast drying properties, you can paint and launch the boat the same day! Fiberglass Bottomkote® NT is a universal product for most substrates (excluding aluminum) and it's an affordable choice!


Color YBB349-Red, YBB359-Green, YBB369-Blue, YBB379-Black

Finish Matte

Specific Gravity 1.94

Volume Solids 50%

Typical Shelf Life 2 yrs

VOC (As Supplied) 449 g/lt - maximum. (3.7 lbs/Gal)




PREVIOUSLY PAINTED SURFACES In Good Condition Consult the Antifouling Compatibility Chart and prepare the surface as required. 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 essential to 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 one of the following Interlux products, Fiberglass Surface Prep YMA601V 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 with Fiberglass Surface Prep YMA601V. Consult the relevant technical datasheet for product directions. Ultimate No Sand System Apply one coat of Interlux Interprotect 2000E. Refer to the Ultimate No Sand System Technical Bulletin for more information. Simple No Sand System Apply 1 coat of No Sand Primer YPA200. Refer to the No Sand System Technical Bulletin for more information.

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. Apply two coats of Fiberglass Bottomkote® NT allowing appropriate drying times.

BARE FIBERGLASS - BLISTER PREVENTION SYSTEM Apply the InterProtect system for the prevention of blisters. Contact the Interlux Technical Service Department at 1-800-468-7589 or visit for complete instructions on the application of The InterProtect System.

BARE WOOD Sand with 80 grade (grit) paper. 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 two or more coats of Fiberglass Bottomkote® NT unthinned, allowing for the appropriate dry times.


Method For use on fiberglass, wood or properly primed steel and lead. At least 2 coats should be applied. Do not apply when temperature is below 10°C/50°F. 


Mixing Stir or shake contents thoroughly before use.

Thinner Special Thinner 216 or Brush-Ease 433.

Thinning Thin only if necessary. Thin no more than 10%. Use Brush-Ease 433 if roller or brush drags during application.

Clean Up Special Thinner 216 or Brush-Ease 433.

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.

Other 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.


Some Important Points Not suitable for use over aluminum/alloy substrates. Colors may fade or change above the waterline. Stir well before use. Mix to a smooth, homogenous mixture. Product temperature should be minimum 10°C/50°F and maximum 29°C/85°F.  Ambient temperature should be minimum 10°C/50°F and maximum 29°C/85°F. Substrate temperature should be minimum 10°C/50°F and maximum 29°C/85°F. 


Compatibility/Substrates 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.

Number of Coats 2 coats, 3 on bare wood

Coverage (Theoretical) - 400 ft²/gal

Recommended DFT per coat 2 mils dry

Recommended WFT per coat 4 mils wet

Application Methods Airless Spray, Brush, Conventional Spray, Roller


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