Duratec® Clear Hi-Gloss Gel Coat Additive

4.8 star rating

Same Day Shipping

For orders placed before 2:30 p.m. ET


  • Item
  • Description
  • Price
  • Qty
  • 1039/69-A
  • 1039/69-A
    Quart Kit with Hardener (2 lbs)
  • $69.95
  • 1040/69-B
  • 1040/69-B
    Gallon Kit with Hardener (8 lbs)
  • $154.95

  • 1039-A
  • 1039-A
    Quart (2 lbs)
  • $64.95
  • 1039-B
  • 1039-B
    Case (6 Quarts)
  • $319.95
  • 1040-B
  • 1040-B
    Gallon (8 lbs)
  • $149.95
  • 1040-C
  • 1040-C
    Case (4 Gallons)
  • $499.95


Improve Gloss and Get an Open-Air Cure

Duratec® Clear High Gloss Additive can be blended with numerous gel coats to create a glossy, smooth finished surface. Mix at a 1:1 ratio with regular gel coat to reduce viscosity and porosity, improve gloss level, and permit a complete open-air cure. It can also be blended at 15% with tooling gel coats to upgrade mold surfaces, improve gloss retention, increase impact resistance, and reduce heat distortion.

The reduction in viscosity allows gel coats to be sprayed controllably through siphon and HVLP equipment, reducing sanding and polishing time. When used for repairs, this product will result in a low porosity surface.

PLEASE NOTE: When making below-the-waterline repairs on boats, we recommend adding our #71 Styrene Wax to maximize hardness.

Requires 2% MEKP.

Duratec® is a registered trademark of DURA TECHNOLOGIES INC.

warning WARNING: This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov


Duratec Clear Hi-Gloss Gel Coat Additive quart (#1039-A), quart case (#1039-B), gallon (#1040-B), and gallon case (#1040-C) can be shipped via standard ground service without hazard charges within the 48 contiguous United States. Both sizes of #1039 and single gallon units of #1040 will be subject to a hazard charge if shipped by air. This product in the gallon case unit (#1040-C) cannot be shipped by air. Please see our Hazardous Shipping Chart for more information about hazard fees. We will consolidate items whenever possible to minimize these fees.


Duratec Clear Hi-Gloss Gel Coat Additive This Hi-Gloss Additive is available in a variety of sizes that include: One quart (#1039-A) One case of six quarts (#1039-B) One gallon (#1040-B) One case of four gallons (#1040-C) *Quantity discounts are available on the case of four gallon containers (#1040-C) only when four or more cases are ordered at one time.


4.8 star rating

Duatec clear hi gloss

Jun 27, 2023  |  By joe fryza

first time user was easy to mix and spray with great results!!

Great quality product

Feb 19, 2021  |  By Benny C

cant ask for better quality gelcoat supplies. 20' Necky Kayak deck restored with Turquoise Blue Gelcoat with Duratec High Gloss clear!


Aug 16, 2020  |  By Michael dobronos

Great product and fresh material unlike the other suppliers of this material. However you pay a much higher price here. Next day service was great
Beyond my expectations
Aug 15, 2020  |  By Manuel Ortiz
This made my project look professional and I'm far from one. High quality and easy to use as long as you follow measurements and directions.

Jun 26, 2020  |  By Richard Duoos
I mixed this 50-50 with my gelcoat and then applied it afterwards as a clear coat. My only regret is not knowing how much thinner it is. I would have used my other gun with a smaller nozzle. I love this product! I did not have to use a reducer when I shot the gelcoat and it also makes a high gloss clear coat.

Aug 19, 2016  |  By Peter
Duratec high gloss additive when mixed at 50% makes a great reducer for spray application of the gel coat 180 using a 2.8 needle and tip in spray gun.

Jun 21, 2016  |  By Mike
Josh helped me a lot... Good guy . Really knows what he's talking about..

Great transaction
Apr 13, 2016  |  By Randel knight
Great transaction ,great product !

Duralac pros and cons, begginers perspective.
Mar 18, 2016  |  By David Irwin
Pros, As advertised the gloss enhancement is outstanding the finish piece has the reflectivity of still water.
When added to gelcoat it does let the mixture cure while exsposed to air.
One unantisipated result however is that the product when used in a 50% mix with the gelcoat is that it dilutes the color of a premixed gelcoat making the color lighter after curing. So if your like I am an not a color nixing guy you may want to start with a shade or 2 darker gelcoat on the fan deck.
Another effect of the "thinning" of the gelcoat is that the color if light in shade will not cover the substrate if it is dark in color. To help with this aspect I used white pigment in the resin mixtures in the layup, and it helped considerably.
Otherwise it mixes well with the gelcoat and pours like 40 wieght oil out of the can, even has the same shade.

Dave Irwin
East Boston MA

duratec high gloss additive
Jan 9, 2016  |  By tommy
Great stuff would recommend to anyone

Great stuff
Mar 24, 2015  |  By Ron C
Works great

Product Q&A