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Product Details

The core of the Quantum high solids repairable topcoat system, Quantum 99 is a revelation. DIYers & pros alike achieve professional results by brush, roller, or spray. Quantum 99 finishes have unmatched durability & gloss, plus superior stain & weather resistance. Unlike other topside systems, Quantum 99 finishes can be repaired by wet sanding & buffing.

Twice the solids means a gallon goes twice as far, and just 2 coats create a finish depth (in mils) equal to 3 coats of other brands. Shorter cure times let you put your boat back in the water faster. Best of all, Quantum 99 finishes last 3 times longer than comparable paints, so you can spend spring weekends doing something other than buffing and waxing.

Available in over 70 colors, including 6 metallic colors, in Quart and Gallon sizes. Base component must be paired with an activator (sold separately).

Tech Specs
Quantum 99 Polyurethane Topcoat Base Physical Properties
Appearance: Gloss. Various colors.
Gloss: 92@60°
Distinctness of Image (DOI): 84@20°
VOC Admixed: <420 G/L (3.5 LBS/GAL) - All colors.
Coverage @ 1 mil (no loss): 800-825 FT 2 /GAL
Coverage @ 3 mils (no loss): 250-275 FT 2 /GAL
Admixed Viscosity 16-18 Zahn #2
Volume Solids (Admixed) 52 +/- 2%
Dry to Tape: 7-9 Hours @ 72°F, 50% relative humidity
Note: To accelerate dry times, use Quantum 99 Urethane Accelerator
Pot Life: 4 hours @ 72°F
Shelf Life: 2 years from date of manufacture
Info & Guides

The Quantum High Solids Repairable Marine Finish System

Until now, 2 part topside paints were for professional use only. Complicated reducers, activators, and primers meant that 2 part polyurethane systems were mostly used by builders, yards, and professional paints.

Quantum99 raises the bar for topside paint systems. Using a brush or roller, you can now achieve the same smooth, glossy finish that professionals get by spraying -with fewer coats and fewer products. Its innovative, hybrid formula gives you a lasting, high gloss finish with exceptional durability.

Though this paint technology is new to the marine industry, it's not experimental. After nearly a decade of rigorous testing, Quantum99 has garnered rave reviews and proven results for superior gloss, gloss retention, and durability. Easy to use. Easy to repair. Its high solids, eco-friendly formula ensures fewer coats and VOC compliance.

As an added benefit, if you need to refinish brightwork as well as topside surfaces, Quantum99 Polyurethane Topcoat paint and QuantumUV Clear Urethane Varnish use the same activators, reducers, accelerators, and additives (see the Quantum System Product Selection Guide at left for details).

Note: Application of these product systems requires recommended temperature/humidity conditions and film thickness ranges. The material, hangar, and substrate temperature should be no lower than 45°F before, during, and after application. Do not apply paint materials to surfaces less than 5°F above the dew point, or to surfaces warmer than 125°F. Substrate temperature should be minimum 45°F to maximum 125°F. See the Quantum Reducer Chart for details.

Quantum99 Polyurethane Topcoat is available in over 70 colors (see Color Chart). For custom colors, inquiries about additional colors not seen here, or to receive a Quantum 99 Color Card (sold separately; contains 60 of the most popular Quantum 99 colors, including 6 metallic colors), call us at (800) 497-0100.

Color Note: When Rolling/Brushing dark colors such as Black Magic, Flag Blue, Carinthia Blue, Palmetto Pride, Aim High, Navy Blue, and Charleston Green we recommend applying a final topcoat of 99-BA1-Clear. The following day after final application of Topcoat Base color, sand with 220-320 grit sandpaper, clean and apply 1-2 coats of Clear.
We recommend applying a first coat of White prior to the color application for the following colors: Citrus Green, Federal Yellow, Lemon Yellow Sun, PCDC Orange, and Oohrah.

Important: We recommend spraying or using a professional for roll applications for the following Quantum99 colors: Sky Blue, Marlin Blue, Empress Blue, Moon Dust, Desert Tan, Desert Sand, and Castle Tan.

Technical Information

<b>Quantum<sup>99</sup> Polyurethane Topcoat Advantages:</b>

  • Ultra high gloss and gloss clarity(DOI)
  • Superior durability and abrasion resistance
  • Acrylic-polyester hybrid combines aerospace paint toughness with automotive paint repairability
  • Excellent repairability--get a perfect application every time
  • Twice the solids = twice the coverage as leading brands
  • Easy to mix/apply
  • Proprietary technology improves flow, gloss, and gloss clarity
  • Easy cleaning with marine soap and water. No buffing/waxing needed to restore gloss.
  • Longest in-service life

<b>Application Data:</b>

  • Apply by spray, brush, or foam roller
  • Mix ratio: Spray 1:1; brush/roller 2:1
  • Best results when spraying are obtained by applying two to three medium wet coats, allowing a 45- to 90-minute "tack-off" period between coats.
  • Recommended dry film thickness is 2.0-3.0 mils (50-75 microns). Some colors (for example, reds and yellows) may require thicker films to achieve complete hiding.
  • For brush/application, in most cases, tipping is not required.
  • Application of these product systems requires recommended temperature/humidity conditions and film thickness ranges.
  • Please refer to the Quantum99 Topcoat How To Guide (at left) for complete temperature, preparation, mixing and application details.
  • Use Quantum Adhesion Promoting Surface Treatment (sold separately) before application to ensure strong adhesion of this coating.

Reviews for Quantum 99 Polyurethane Topcoat Base

10 of 11 Reviews

October 9, 2020

I will not do business with them again
By Blue Bamboo from Rio Dulce, Guatemala

Experienced contractor with 15yrs experience sprayed it on my 40' catamaran. The Q99 topcoat adhered well to the existing 2 part paint and looked great however it peeled off the Q45 epoxy primer. I contacted Jon and Sarah at EMC and they said the paint was good, we must have done something wrong. Repeated the process following instructions under varied conditions without success. When I sent a video of Q99 topcoat peeling off a test patch of Q45 primer the only comment was "Why is your primer yellow and not white, which is what you ordered?" I sent them photos of the Q45 epoxy primer and activator cans, which matched the cured primer on the boat – exact same color, a cream yellow-not white like the can said. I explained that was the product I received and we followed the simple 1:1 mix. They stopped communicating with me despite my repeated attempts. I conceded to the fact that they were not willing to help. Having lost faith in both the company and the product I stripped all of the Q99 paint, re-prime and repaint the boat with another product. I made one more attempt, copying Jamestown and requesting a refund on the $3000 + worth of failed product. Everyone has problems - it's how you deal with them that counts. Jamestown was great, they got involved so Quantum promised insurance reimbursement. After 4 months of run around they finally offered me $1000 - I chose to warn my fellow boaters instead of taking the money. BEWARE they will not stand by their product.

Bottom Line No, I would not recommend to a friend

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June 29, 2020

Yes easy to use.
By motorboater from pagosa springs, co

Awesome stuff, used "black magic". Sprayed with an hvlp outside on a perfect day. Covered in 2 coats, but I did 3 so i can buff out anything i may have to, had about 20 small bugs from spraying outside; and a few runs but everything buffed out smoothly and glossy. Looks like it was done in a spray booth. Amazing stuff. Will see how it lasts.

Bottom Line Yes, I would recommend to a friend

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May 17, 2020

Easy to apply with great results
By Greg from Rathbun lake, iowa

Verified Purchase

Painted the hull of my 77 33ft chris craft offshore. Looks really good, put on two coats, probably could of used a third. Do do three on a few spots and it still came out great.

Bottom Line Yes, I would recommend to a friend

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March 27, 2020

I might
By Chris H from Norfolk VA

If you spray you need to get the mixture just right. I tried to roll several times wasting expensive paint is not really fun

Bottom Line No, I would not recommend to a friend

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January 31, 2018

will use again
By tommyp from sagamore beach, ma

Practiced on dinghy. Rolled, sanded, buffed, sprayed. Roll (used suggested rollers) gives orange peel but very good from far, could not buff section w/o obvious difference, sprays fantastic, can go over previous rolled areas (holidays) with wet roller but cannot touch with dry anything after only a few minutes, very, very durable. Really is good from far, if far from good.

Bottom Line Yes, I would recommend to a friend

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December 4, 2016

EMC paint
By Power boat works from Seattle

Verified Purchase

I wanted a paint that I can roll and tip to apply. I've tried one part, two part and water base. And so far this is the best overall for me to roll on. I don't even pull out a brush unless I need it because a roller won't fit. I mix it as recommended with their products. 2:1:1. Their white foam "cigar" rollers seem to last the longest also. Hoping EMC finds a distributer in the Seattle area!!

Bottom Line Yes, I would recommend to a friend

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August 2, 2016

So far so good
By Theresa from Deltaville,Va

Verified Purchase

I am in the middle of repainting the deck and cabintop of our steel 36' cutter off white. As it is the middle of summer, the heat and humidity are a real challenge, but it has been easy to use this paint nonetheless. We are using the recommended foam rollers, not spraying. The coverage, gloss and self leveling have been excellent. The off white is quite bright, though, and I would choose something more subdued if I had to do this again. It is difficult, especially in the white spectrum,to choose acurately from a color photo, and I was not successful in getting a color chip from the manufacturer. We are using a different product for the non-skid areas so I can't comment on that, but so far so good.

Bottom Line Yes, I would recommend to a friend

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January 21, 2016

Awesome Paint! Better than Awlgrip
By Dan the Man from Warwick Rhode Island

I sprayed my boat. It came out awesome. It was a little more money than awlgrip but I actually saved because I got better coverage and didn't need to buy as much paint.

Bottom Line Yes, I would recommend to a friend

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April 13, 2015

Topcoat not for Amateur
By Chris V from New Orleans, LA

I have following instructions and tried thinning,etc.. 30% resulting in drips, 15% results in orange peel. This paint is difficult to roll on without orange peel. This paint cannot be tipped with any success, too thick? I am not a professional painter, but this is not my first time using marine polyurethane either. The good part is after many hours of wet sanding and buffing out orange peel, the finish is very smooth and glossy. My advice is to have a professional spray this paint. I recommend this paint because it can be repaired due to amateur application.

Bottom Line Yes, I would recommend to a friend

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March 4, 2015

Quantum 99 paint
By AntBlack from Charleston, SC

I've used this paint for over a year now in my boatyard. We've painted a number of boats and parts with great success. It goes on easily and shines like no other paint we've used. When you do make a mistake, it's easy to fix and you can't even tell where the repair was. We've also had really good results clear coating wood.

Bottom Line Yes, I would recommend to a friend

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