Applying Interlux Antifouling Paint to Aluminum Hulls, Outdrives and Metal Keel

Aluminum is difficult to overcoat because it oxidizes instantly on contact with the atmosphere. Here are some best methods for adhering coatings to aluminum:

  1. Degrease the surface with Fiberglass Solvent Wash 202 or Special Thinner 216.
  2. Bring metal to a uniform bright finish by sandblasting with non-ferrous blast media such as clean silica sand or, if blasting is not possible, grind using a 36-grit wheel. Remove blast or sanding residue with clean air or a broom.
  3. Within one hour of blasting or sanding, apply the first coat of InterProtect 2000E/2001E. If more than one hour has passed, apply one thin coat of Viny-Lux Primewash 353/354 thinned 25% with Viny-Lux Solvent 355 prior to the application of InterProtect.
  4. Apply a total of 3 coats of InterProtect 2000E/2001E Apply 4 coats over riveted and welded areas.(If overcoating times of InterProtect 2000E cannot be followed use 5-6 coats of Primocon).
  5. Apply 2-3 coats of Trilux 33.

PAINTING OUTBOARDS & Outdrive Units Below the Water

  1. Clean thoroughly with Special Thinner 216. Sand the surface with 80-grit sandpaper or coarse emery cloth.
  2. Prime bare spots with Viny-Lux Primewash 353/354.
  3. Apply 2-3 coats of Primocon or Primocon Aerosol.
  4. Apply Trilux 33 or Trilux Prop & Drive.

Fairing and Painting Metal Keel and Centerboards

  1. Degrease the surface with Fiberglass Solvent Wash 202or Special Thinner 216.
  2. Bring metal to a uniform bright finish by sandblasting with non-ferrous blast media such as clean silica sand or, if blasting is not possible, grind using a 36 grit wheel. Remove blast or sanding residue with clean air or a broom.
  3. Within one hour of blasting or sanding, apply the first coat of InterProtect 2000E/2001E. If more than one hour has passed, apply one thin coat of Viny-Lux Primewash 353/354 thinned 25% with Viny-Lux Solvent 355 prior to the application of InterProtect .
  4. If fairing is necessary, fair surface using Watertite YAV135. Sand Fairing Compound until desired smoothness is reached.
  5. Apply four additional coats of InterProtect 2000E/2001E and follow with antifouling paint.

The information provided here has been reproduced courtesy of Interlux. Wholesale Marine reproduced this information 08/14/2009.