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Jamestown Distributors(800) 497-0010
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TotalBoat Topside Primer is a premium marine undercoat compatible with one-and two-part topside finishes. Intended for use above the waterline, it can be sprayed, rolled, or brushed prior to painting with polyurethane or enamel topside paints.
Use on wood, fiberglass, gelcoat, & over previously painted materials. This single-part, high-solids primer requires only a single coat, dries quickly & sands easily. Thin with TotalBoat Special Brushing Thinner 100 when brushing, and xylene when spraying. TotalBoat Topside Primer comes in White or Gray in Quarts and Gallons.
We recommend this primer with our TotalBoat Wet Edge Topside Paint, available in 21 brilliant colors.
IMPORTANT: Stir primer continuously for five minutes before use.
Bonus included with all purchases: 2 plastic 1 QT paint pots, and 2 10" wooden stir sticks.
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High-performance, one-part primer
Lead and chromate free
Thinning and Cleanup
Thinning (Brush/Roll Application): TotalBoat Special Brushing Thinner 100
Thinning (Spray Application): Xylene
Cleanup: TotalBoat Special Brushing Thinner 100, TotalBoat Dewaxer & Surface Prep, or xylene
Preparation & Application Tips
Preparation is the key to good-looking, long-lasting, results. A properly prepared surface is clean, solid and dry. Do not paint immediately after rain, during foggy weather or when the temperature is below 50 degrees Fahrenheit.
Use a foam roller or firm polyester brush for best results. If spraying, thin with xylene up to 15-20%. Avoid lap marks by not painting in direct sunlight and by coating sections of the surface either down or across hull to natural breaks, maintaining a wet edge.
If your edge begins to dry or you see that you missed a spot and the primer is already setting up, allow it to dry completely before touching up that area.
Do not lather on primer too thickly or you will compromise all flexible adhesion characteristics that make TotalBoat Primer one of the industry's leading one-part undercoats. Dry Film Thickness should be 1-2 mils.
Phenolic Modified Short Oil Alkyd
Brush, Roll or Spray
Number of Coats
Dry Film Thickness (per coat)
Wet Film Thickness (per coat)
Dry Time (to touch)
1 hour @ 50°F 30 mins @ 70°F 10 mins @ 90°F
Dry Time (to overcoat)
4 hours @ 50°F 2 hours @ 70°F 1 hour @ 90°F
250-300 sq ft/gal
< 358 grams/liter
Solids (by weight)
Solids (by volume)
WARNING: This product can expose you to chemicals including titanium dioxide, ethylbenzene, silica crystalline, and cumene, which are known to the State of California to cause cancer, and n-methylpyrrolidone, which is known to the State of California to cause developmental toxicity. For more information, go to www.P65Warnings.ca.gov
Below Water Line (yes/no):
Number Of Parts:
Rate Of Cure:
Topside Paint Primer
Will one quart cover the interior of a 20 foot flats boat?
One quart covers @ 100 sq ft.
My existing topside paint is a 2 part product. Can I apply this over the 2 part topside paint if it is properly sanded, or do I need to remove all of the existing paint before applying?
You can apply over two-part paint. Read the tech sheet listed under the "more info" tab for complete instructions.
Can I add Gel Coat Pigment to Topside Primer? If so who much? The same questions for Interlux Epoxy Primekote. Thank you.
Gelcoat pigment will not work with Topside Primer. It may work with epoxy primer but you should confirm that with Interlux. Before you try tinting the primer, you should consider that if you have not applied enough paint to hide the primer, you have not applied enough paint. Topcoat is best when applied in very thin layers. The first coat will not likely hide the primer but you keep applying thin coats until you are satisfied the final color.
What's the full story here? I am about to prime my 28' Four Winns with Topside Primer in prep for a final top coat of Perfection 2 part paint. Your Topside Primer specs list it as a good primer for this purpose. Yet you have the following Q/A on the product posted. Will this primer work with Interlux Perfection 2 part paint and does in come in white ???Asked on 9/28/2019 by Ed from Des Moines, IowaKnow the answer? Answer this question1 answerCUSTOMER CAREA: Not recommended, with Perfection use Interlux Epoxy PrimekoteAnswered on 10/8/2019 by Richard from Jamestown Distributors
TotalBoat Topside Primer is chemically compatible with two part paints like Perfection. However, it is not advisable to put a relatively hard paint like Perfection over a softer paint like Topside Primer. You will have better results and longevity with an epoxy primer. If the surface is currently coated with a one-part paint, best practice is to remove the paint before priming with a two-part.
totalboat primer says not for below waterline... but the video shows using it on complete dinghy hull, which is what i was planning... using totalboat Wet Edge for top coat... is there a better choice for primer? dinghy is fiberglass and will sit in water all summer.. will apply bottom paint as well
You should use TotalBoat Total Protect for a substrate that will be submerged for more than a couple of days, and overcoat it with bottom paint. Do not apply Topside primer or Wet Edge below the waterline.
Will this primer work with Interlux Perfection 2 part paint and does in come in white ???
Not recommended, with Perfection use Interlux Epoxy Primekote
just replaced some mahogany planks on my 69 Pacemaker and want to put a coat of primer on them to protect over the long winter. I will not be able to put a top coat on the boat until next summer. will this present a problem? I have read that some primers need to be coated over in a certain period of time. Is this the case for Topside primer? If so what would you suggest for protecting the new wood over the winter?
sorry cant help i used it inside the cabin and covered over it in few hours
You could do a coat of primer now and then sand that next summer and apply another prior to a topside paint.
JD Tech Team
I am building a glued lapstrake boat and have applied epoxy over the entire okume surface. Which of your primers should I order and apply before I apply my topside paint? The epoxy is West 105 or System Three, not sure as I have used both. I'm ordering a gallon of your 5:1 Total Boat epoxy today to laminate in my seat cleats as my System Three is old and not setting up properly.
Total Boat Topside Primer is a excellent product. It provided an excellentbase layer for the 5:1 Total Boat epoxy used in the construction of theboat.
The epoxy itself is a good primer. If you still want to prime over the epoxy, the Total Boat topside or Total Protect 2 part are both excellent. If not then scuff up the epoxy first so the paint will adhere.
If you remove the blush from the epoxy and sand smooth, the 2-Part Epoxy Primer will give the best adhesion and help with finish fairing, but if you want easy, open-the-can-and-go primer, the TotalBoat Topside Primer should be applied very thin. This decision also depends on what you intend on painting it with in the end. Please do not hesitate to reach out to one of our paint techs at (800) 497-0010 if you have any more specific questions that we can help you with.
JD Tech Associate
Are there tips to apply this product in higher temps (90 deg f) - I live in south Carolina and want to prime the deck of my sailboat Also does this product have UV protection - what is the maximum recommended exposure time before this product should be covered with a topside paint
This product will probably be tough to apply in those temperatures, based upon the very quick dry times. Thinning this product with TotalBoat Special Brushing Thinner 100 will slow that drying rate, as well as give it some more flow characteristics. One huge thing to keep in mind is that this product is more of a tie coat. 1 or maybe 2 THIN coats, do not try and fill areas or get full color hide with this primer, it will become gummy and annoying to deal with if you are trying to fill areas and apply it heavy. It requires a topcoat for the UV stability, it is not recommended to leave it for a duration in direct sunlight. It may amber slightly over time in direct sunlight, but if you can get to topcoat it in a week or two, that would be safe under direct UV conditions.
JD Tech Associate
Will this work over West Epoxy?
I used it over other epoxy, no problem. Be sure to wash the amine blushoff West. It blushes more than some.
Yes... I used it on the toe rail on my 1946 custom Rhodes sloop and there was one very small section of epoxy. No problem. 2 coats of primer (put on thin) and two coats of Topkote gloss. Holding up very well...
The answer is yes but follow West's guidelines for prep before painting.
Absolutely yes. You must prepare the surface properly though, by removing any amine blush from the West Systems, and sanding the epoxy smooth to 180- or 220-grit before applying.
JD Tech Associate
It does it's job
I've been fully restoring an old fiberglass sunfish sailboat, the primer went on and stuck like a charm.
I would use again
Worked as advertised
Works, but you will need to wet sand.
Easy to use and covers well. The major problem is that it gums up the sandpaper even after 72 hours, However, if you wet sand it is not a problem.
Great look and great value!
Doing a rebuilt on an old C-Hawk and this is what the doctor ordered. Great filler properties and base coat/foundation for this 30+ year old hull inside and out.
I would buy again
Easy to work with and a great primer. Finished with the Topside 1 part and it all worked well.
La Crosse WI
I would definitely recommend this product
HARD TO SAND
Perhaps thining the primer before rolling on would have helped, next time. I planned on spraying but it was too windy so I rolled it on. Had a hard time sanding after I rolled it on. Took about 1 hour per square foot to bring it down to a smooth surface. I also us d automotive primer in another area and was much easier to sand.
Perfect primer for our boat project. Jamestown Total Boat products are always the best! Never disappoint!
North Central Florida
I would buy this product again.
Very easy to use. Sprays easily via HVLP sprayer and drying time is really short.
i would buy this product again
Worked great. I sprayed it through my primer HVLP gun with a 1.8 tip. I thinned it 20% with Zylene. two coats gave good coverage. Topped it with Wet Edge.