How To Apply Pettit Aluma Protect Application Data
The information provided here has been reproduced courtesy of Pettit Paint Company. Wholesale Marine reproduced this information 2/22/2008.
GENERAL DESCRIPTION
Aluma Protect Aluminum Epoxy Primer 4400/4401 is a corrosion
resistant, two component epoxy-polyamide coating for use on
sandblasted aluminum where maximum resistance to fresh or salt
water is required. The complete coating system is resistant to water,
many industrial chemical fumes, and very humid environments.
It is intended as a corrosion resistant primer coat for aluminum
pleasure craft and has excellent durability in exterior exposures,
although, like most epoxies, it will chalk if not top coated.
APPLICATION INFORMATION
Stir both components thoroughly. Mix the two components together
in the ratio of 1 part of Component A to 1 part of Component B by
volume. Allow to stand 15 minutes at approximately 70 before using.
(Allow to stand at least 30 minutes if temperature is between
50 and 65F) May be applied by brush, roller, conventional or airless
spray. Thinning is not normally required for application, however,
small amounts of 97 Epoxy Thinner may be used if necessary
to facilitate application. Wet film thickness should be 3.6 mils per
coat, which yields 1.0 mil dry film thickness. A wet film thickness
gauge should be used to monitor paint application. One or two
coats of Aluma Protect 4400/4401 should be overcoated with Pettit
Protect 4700/4701 to provide a corrosion and chemical resistant
barrier for use on all aluminum craft and surfaces.
SURFACE PREPARATION
Coating performance, in general, is proportional to the degree of
surface preparation. Follow recommendations carefully, avoiding
shortcuts. Inadequate preparation of surfaces will virtually assure
inadequate coating performance. Degrease aluminum by wiping
with 97 Epoxy Thinner. Sandblast, sand or grind the surface to
achieve a good adhesion profile.
PHYSICAL DATA
VEHICLE TYPE…..Epoxy/Polyamide
FINISH…..Low Luster
COLOR…..Bright Yellow
COMPONENTS….2
MIX RATIO (A/B)…1 to 1 (by volume)
CURING MECHANISM….Chemical Cure
SOLIDS (theoretical)
By weight…..45 +/- 2%
By volume….28 +/- 2%
COVERAGE…..450 sq. ft/gal.
VOC….596 g/l max. (admixed)
FLASH POINT….60F Part A
40F Part B
APPLICATION DATA
METHOD…..Brush, Roller, Airless or Conventional Spray
INDUCTION PERIOD….15 minutes @ 70F
NUMBER OF COATS….1 or more
DRY FILM THICKNESS PER COAT….. 1 mil (3.6 wet mils)
APPLICATION TEMP (air & substrate)…..
50 F. Min. / 90F. Max.
POT LIFE…. 6 hrs. @ 90F
10 hrs. @ 70F
20 hrs. @ 50F
DRY TIME (Hours)
Substrate To To To
Temp Recoat Bottom Paint Launch
90F 1 - 24 1 - 8 48
70F 4 - 96 4 - 16 72
50F 8 - 192 8 - 24 120
If these recommended intervals are exceeded, sand
thoroughly with 80 grit sandpaper before recoating
or applying bottom paint.
THINNER…..97 Epoxy Thinner
ASSOCIATED PRODUCTS
97 Epoxy Thinner
SYSTEMS
Bare Steel:
Not recommended - use Pettit Protect 4700/4701 for steel surfaces.
Bare Aluminum, Hulls and Outdrives:
Sandblast (using non-metallic media) or disc sand the aluminum to clean, bright metal. Wipe clean of residue and immediately apply one coat of Aluma Protect Aluminum Epoxy Primer 4400/4401. At 70F let dry 4 hours minimum, 96 hours maximum, and apply an additional coat followed by two coats of Pettit Protect High Build Epoxy Primer 4700/4701 following application and recoat instructions.
Previously Primed Surfaces:
Aluma Protect Aluminum Epoxy Primer 4400/4401 may be applied over existing two part epoxy finishes, provided they are in sound condition. Brush-off sandblasting or very heavy sanding with 60 grit sandpaper is required to maintain maximum adhesion. Then apply one or two coats 4400/4401 per instructions. Remember, coating performance is only as good as the surface to which its applied. All existing two package epoxy finishes in poor condition, as well as all one package primers and bottom paints, should be removed completely and the appropriate bare aluminum system as described above should be followed before using Aluma Protect Aluminum Epoxy Primer 4400/4401. Aluma Protect Aluminum Epoxy Primer is not recommended for use over antifouling paints.