APPLICATION DATA METHOD: Short Nap Roller or Airless Spray
NUMBER OF COATS: Three initial; one or two in subsequent years
DRY FILM THICKNESS PER COAT: .25 mils (3 mils wet)
COVERAGE: 90 sq. ft/quart.
APPLICATION TEMP: 40°F Min. / 90°F Max.
THINNER: Isopropyl Alcohol
PREVIOUSLY PAINTED SURFACES: If the previous coating is in good condition, thoroughly sand with 80 grit paper followed by thorough sanding with 180-grit then 220-grit and finally 320-grit sandpaper to achieve a smooth nonporous surface. Then solvent clean with Pettit 120 Brushing Thinner to remove residue. Apply three coats of SR-21. If the previous coating is soft or in poor condition, remove to the bare surface by sanding or using Pettit 9051 Bio Blast Paint Remover. proceed with the appropriate bare system as described below. Old tin copolymers should be removed before applying SR-21 Antifouling Paint.
BARE FIBERGLASS: : All bare fiberglass, regardless of age, should be thoroughly cleaned with 92 Bio-Blue Hull Surface Prep or de-waxed several times with Pettit D-95 Dewaxer. Sand thoroughly with 320 grit sandpaper to a dull, frosty finish and rewash the sanded surface with 120 Brushing Thinner to remove sanding residue. Then apply two or three coats of SR-21, following application instructions. Careful observation of the above instructions will help ensure long term adhesion of this and subsequent years’ antifouling paint. To eliminate the sanding operation, two methods are available: 1. Prep the surface with 92 Bio-Blue Hull Surface Prep or wash the fiberglass three times using Pettit 95 Dewaxer. Then apply one thin coat of Pettit 6998 SkipSand Primer or 6999 Sandless Primer. Use a 3/16” or less nap when applying by roller. Consult the primer label for complete application and antifouling top coating instructions. (Use the set-to-touch recoat time over the 6999 Sandless Primer. Do not apply SR-21 over 6999 Sandless Primer that has dried beyond the tack-free state). Apply two or three coats of SR-21. 2. Clean, de-wax and etch the surface with 92 Bio-Blue Hull Surface Prep using a course Scotch-Brite pad in a swirling motion. Then apply one coat of Pettit 4700/4701 High Build Epoxy Primer. Consult the primer label for complete application and antifouling top coating instructions. Apply two or three coats of SR-21.
BARRIER COAT: Fiberglass bottoms potentially can form osmotic blisters within the gelcoat and into the laminate. To render the bottom as water impermeable as possible, prepare the fiberglass surface as mentioned above (sanding method) then apply three coats of Pettit Protect 4700/4701 Gray High Build Epoxy Primer or three coats of Pettit Protect 4100/4101 White High Build Epoxy Primer per label directions. Apply two or three finish coats of SR-21.
BARE WOOD: Sand entire surface with 80 grit paper; wash clean with 120 Brushing Thinner. Apply a coat of Unepoxy thinned 25% with 120 Brushing Thinner, allow an overnight dry, lightly sand and wipe clean. Apply two finish coats of Unepoxy.
STEEL HULLS: Sandblast or disc sand to a clean, bright finish and remove residue. Then immediately apply two coats of 6980 Rustlok Steel Primer, allowing each to dry only 1-2 hours prior to overcoating. Follow with two coats of Pettit Protect 4700/4701 Gray High Build Epoxy Primer or three coats of Pettit Protect 4100/4101 White High Build Epoxy allowing each to dry from two to 24 hours depending upon temperature. Apply three finish coats of SR-21 Antifouling Paint.
KEELS - LEAD: Abrade surface to bright metal; wipe clean using Pettit 120 Brushing Thinner. Apply one thin coat of 6455/044 Metal Primer; allow to dry two hours. Apply one coat of Pettit 6627 Tie Coat Primer then, if fairing is required, apply Epoxy Fairing Compound. Follow with an additional coat of 6627 Tie Coat Primer per label directions. Apply three finish coats of SR-21.
KEELS - STEEL OR CAST IRON: Abrade surface to bright metal; wipe clean using Pettit 120 Brushing Thinner. Apply one coat of 6980 Rustlok Steel Primer, allowing to dry only 1 - 2 hours prior to over coating. Then, if fairing is required, apply 7050 EZ-Fair Epoxy Fairing Compound followed by one coat of Pettit 6627 Tie Coat Primer. Apply three finish coats of SR-21.
DO NOT USE THIS PRODUCT ON ALUMINUM HULLS AND OUTDRIVES.
APPLICATION INFORMATION: Mix all of the copper powder into the liquid portion stirring thoroughly to ensure the copper powder is evenly dispersed in the liquid. Stir occasionally during application. Apply SR-21 with a short nap (no more than 3/16 inch nap) or foam roller. Roll quickly in one direction only using a fairly dry roller to minimize lap marks. For spray application use an airless spray gun with a .011 to .015 inch tip. Apply a wet coat of product by holding the gun no more than 10 inches from the hull. Do not use conventional spray equipment to apply this product. Apply at three mils wet to achieve a dry fi lm thickness of 0.25 mils per coat. Adhere to all application instructions, precautions, conditions and limitations to obtain optimum performance. Refer to individual labels and tech sheets for detailed instructions when using associated products, etc. Do no thin SR-21 more than 10% (2.5 ounces per quart kit) or inadequate paint film thickness will occur and premature erosion of the finish will be likely. All surfaces must be clean, dry and properly prepared prior to painting. 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. No antifouling paint can be effective under all conditions of exposure. Man made pollution and natural occurrences can adversely affect antifouling paint performance. Extreme hot and cold water temperatures, silt, dirt, oil, brackish water and even electrolysis can ruin an antifouling paint. Therefore, we strongly suggest that the bottom of the boat be checked regularly to make sure it is clean and that no growth is occurring. Lightly scrub the bottom with a soft brush to remove anything from the antifouling paint surface. Scrubbing is particularly important with boats that are idle for extended periods of time. The coating is most effective when the boat is used periodically.
ASSOCIATED PRODUCTS: 92 Bio-Blue Hull Surface Prep; 95 Fiberglass Dewaxer; 6998 Skip-Sand Primer; 6999 Sandless Primer; 4100/4101 White Pettit Protect High Build Epoxy Primer; 4700/4701 Gray Pettit Protect High-Build Epoxy Primer; 6455/044 Metal Primer; 6627 Tie-Coat Primer; 6980 Rustlok Steel Primer