Pettit Protect High Build Epoxy Primer 4700/4701 is a heavy-duty, two-part epoxy-polyamide coating that may be used on almost any part of your boat. This versatile primer is excellent for not only preventing and repairing osmotic blisters, but is also equally effective at protecting underwater metals from corrosion.
Pettit Protect epoxy primer forms a tight, high build, durable chemical resistant film. The complete coating system is resistant to water, many industrial chemical fumes, and very humid environments. It is ideally suited to many commercial and pleasure craft applications and has excellent durability in exterior exposures, although, like most epoxies, it will chalk if not topcoated.
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DRY TIME at Substrate Temperature
90 Degrees F
70 Degrees F
50 Degrees F
MIX RATIO (A/B)...3 to 1 (by volume)
CURING MECHANISM....Chemical Cure
By weight.....71 +or- 2 percent
By volume....56 +or- 2 percent
COVERAGE.....225 sq. ft/gal.
VOC....378 g/l max. (admixed)
FLASH POINT....80 degrees F
METHOD.....Brush, Roller, Airless or Conventional Spray
INDUCTION PERIOD....15 minutes at 70 degrees F
NUMBER OF COATS....3 min.
DRY FILM THICKNESS PER COAT.....4 mils (7.1 wet mils)
APPLICATION TEMP (air & substrate).....50 degrees F. Minimum, 90 degrees F. Maximum
POT LIFE.... 2.5 hrs. at 90 degrees F
5 hrs. at 70 degrees F
10 hrs. at 50 degrees F
Stir both components thoroughly. Mix the two components together in the ratio of 3 parts of Component A to 1 part of Component B by volume. Allow to stand 15 minutes at approximately 70 degrees before using. (Allow to stand at least 30 minutes if temperature is between 50 degrees and 65 degrees F.) Primer may be applied by brush, roller, conventional or airless spray. Thinning is not normally required for brush or roller application, however, small amounts of 97 Epoxy Thinner may be used if necessary to facilitate application. For spraying, use 97 Epoxy Thinner at levels of 5-10 percent by volume to ensure a smooth finish with minimal orange peel. Wet film thickness should be 7.1 mils per coat, which yields 4 mils dry film thickness. A wet film thickness gauge should be used to monitor paint application. Total dry film thickness for a three coat application should be 12 mils minimum for maximum coating performance. If this has not been achieved with three coats, additional coats are recommended until 12 dry mils is reached.
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.
Bare Fiberglass: All fiberglass surfaces, regardless of age, should be washed at least twice with Pettit 95 Fiberglass Dewaxer. Change rags frequently to ensure complete removal of wax, mold release, or other contaminants. Sand the surface thoroughly with 60 grit sandpaper and rewash with 95 Fiberglass Dewaxer to remove sanding residue. Apply at least three coats of Pettit Protect High Build Epoxy Primer 4700/4701 following the application and recoat instructions. Finish with two coats of Pettit antifouling paint.
Blistered Fiberglass: Refer to Pettit Technical Bulletin TB1000 Gelcoat Blister Repair and Prevention Specification for detailed instructions.
Bare Steel: Sandblast to SSPC-SP 6 Commerical blast, blow off residue with clean, compressed air, and immediately apply three coats 4700/4701 following application and recoat instructions.
Alternatively, hand sand with 80 grit sandpaper or power hand tool clean, then remove residue with clean compressed air or by vacuuming. Immediately apply one coat of Pettit 6980 Rustlok Steel Primer and let dry to a tack free state (usually 30 minutes to 2 hours, dependent on temperature). Then apply three coats of Pettit Protect High Build Epoxy Primer 4700/4701 following application and recoat instructions. Do not let Rustlok Primer dry longer than 2 hours under any circumstances before applying Pettit Protect High Build Epoxy Primer 4700/4701.
Bare Aluminum: Sandblast (using non-metallic media) or disc sand the aluminum to clean, bright metal. Wipe clean of residue and immediately apply one thin coat of Pettit 6455/044 Metal Primer. Let dry 8 hours minimum, 48 hours maximum, and apply three coats Pettit Protect High Build Epoxy Primer 4700/4701 following application and recoat instructions.
Keels - Lead: Disc sand or otherwise abrade surface to bright metal; clean off residue. Apply one thin coat of 6455/044 Metal Primer and allow to dry eight hours. Apply one coat of Pettit Protect High Build Epoxy Primer 4700/4701. Let dry to recoat. Then, if fairing is required, apply Pettit Protect 7000/7001 Epoxy Fairing Compound. Sand smooth with 80 grit sandpaper and follow with two additional coats of 4700/4701 per label directions.
Keels - Steel or Cast Iron: Disc sand or otherwise abrade surface to bright metal and clean off residue. Apply one coat of 6980 Rustlok Steel Primer, allowing to dry only 1/2 - 2 hours prior to overcoating, no more, no less! Apply one coat of Pettit Protect High Build Epoxy Primer 4700/4701. Let dry to recoat. Then, if fairing is required, apply Pettit Protect 7000/7001 Epoxy Fairing Compound. Sand smooth and follow with two additional coats of 4700/4701 per label directions.
Previously Primed Surfaces: Pettit Protect High Build Epoxy Primer 4700/4701 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 three coats of 4700/4701 per instructions. Remember, coating performance is only as good as the surface to which it's applied. All existing two package epoxy finishes in poor condition, as well as one package primers and bottom paints, should be removed completely and the appropriate
bare system as described above should be followed before using Pettit Protect High Build Epoxy Primer 4700/4701.
Total dry film thickness is more important than the actual number of coats applied. On metal and fiberglass, if 12 mils total DFT is not achieved with three coats, additional coats are recommended until 12 mils total DFT is achieved.
Reduces water absorption in fiberglass hulls and prevents osmotic blistering.
High film build for maximum protection with fewer coats.
Excellent water and chemical resistance.
Exceptional protection for steel, aluminum, and other metals.
High Performance System for Underwater Running Gear.
Below Water Line (yes/no):
Number Of Parts:
Barrier Coat Primer
Can the antifouling paint be applied directly over the primer or is sanding required before Hydrocoat application?
Pettit doesn't specify if sanding is needed before applying the bottom paint. We always recommend a light sanding after the primer cures for better adhesion.
JD Tech Team
Can this be used directly on sanded wood? What topside topcoat is recommended over this?
No I don't think so. The can noes not say any thing about wood. This primer is to protect glass from blisters. I am in fresh water and have not painted it yet. If you are down to bare wood use good wood primer and two coats of bottom paint. Bob E.
Yes on bare wood is ok I sealed wood with epoxy Then sanded then paintedAs far as painting over this I used a good quality enamel seemed to do a good job Oh sand epoxy paint before painting with enamel
I have a 20 ft boat with a 6 ft beam. Will 2 qts be enough to get two coats?
Might as well get the gallon, Total Boat also makes a similar product
to Bill M,If you are down to bare glass you will have no problem with two qts. It goes on very easy. Just mix it the way it tells you too. Bob E.
Does the paint work well on aluminum? Can I buy just the 4701 part B?
I have only used it on fiberglass, epoxy, and wood. It really sticks and covers well. I don't know why it wouldn't stick to properly prepped metal. Check out spec. sheets from Pettit. You have to ask Jamestown about the last part of your question. Good Luck.
I'm planning to use PETTIT HYDROCOAT as my ablative bottom paint this year. The bottom of my boat will be blasted clean first. I want to apply a barrier coat first before using the HYDROCOAT. What Pettit product should I use for the barrier coat to insure a strong chemical bond between the barrier coat and the ablative paint? I'm concerned because HYDROCOAT is a water based product. Thanks! I look forward to your response.
So far very pleased with results of Pettit Highbuild Epoxy system. Using it on a new boat project and also on a refurb of an old Boston Whaler. rolls on smooth, sands well, and fills cracks etc. well. Bonded well on the refurbish, have not put the top coat on yet but it sealed the hull nicely and makes a great primer for the finish coat. I will be using it again. North Shores Boats
I use the Pettit Protect High Build Epoxy as spot coating when sanding exposes gel coat. I used the Hydrocoat bottom paint over the epoxy and have had no problems.
What's the coverage area of one gallon? I have a 42 foot Sabre...
jon d, I own a 38'chris craft and I think I used not quit 2 gal. But I put on 2 coats. It spreads very well. It has been two seasons and is lasting very well. I pleased how it is lasting. Bob Ervay
can I use this over west system?
Yes, you can... I have many times. Sand with 100-120 grit use dewaxer first.
I scraped off all of the old bottom paint on my sailboat/ sanded with 60 grit and painted three coats. paints well and seems tough. not familiar with west systems but if its an epoxy bottom paint you can cover it with this epoxy. if its an anti fouling paint I would remove it all before covering with an epoxy
any surface preparation? bottom never painted. one coat and bottom paint?? coverage??
Bill, I was very pleased with the Pettit product. If you had your boat setting in the water you have to clean the bottom first. I was told to put two coats of high build,then two coats of bottom paint. I was very sastisfied with the end results. Bob
May very well do the job (barrier) but will not yeild a smooth finish like other products we have used. Try as we may, several types rollers and tipping, did not result in a suitable finish over which to paint for a smooth bottom job. Very hard sanding as well so be careful what you put this on.
Cape Cod, MA
Unique specific purpose
I plan to use this on the cabinet bottom under a sink to provide a water resistant coating to the particleboard. Previous leaks have warped the board which has been leveled with floor leveling compound. The small container allows me to have enough to cover without the waste of extra coating left over. I had to look hard for this epoxy and container size.
The old goat
Paso Robles, CA
This is a good high build epoxy primer. Goes on well and covers great. Also seems to sand well. Should seal and hold up well, have not water tested yet, but looking forward. Good price also.
Would buy again
Product was well packaged. Went on well following directions. Good coverage and rolled on easy.
I would buy this product again and again
It works very well if applied following the directions of the manufacture. I used it on the stern board of my old Zociac, to provide a water barrier. I know it would be good as a primer for under water metal parts. I mixed some of the primer with a putty knife. It dried on the knife and I had the devil of a time trying to get it off!