Duratec Clear Hi-Gloss Additive 904-001 with MEKP

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Duratec

Duratec Clear Hi-Gloss Additive 904-001 with MEKP

SKU:DURA-904Q

Brand Duratec Part No. 904-001

$64.95 USD

$64.95 USD ~~USD~~

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Size: Quart with Catalyst

Quart with Catalyst Gallon with Catalyst

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Duratec Clear Hi-Gloss Additive (904-001) blends into gelcoat and converts it to air-cure chemistry. The mix sprays like paint and cures to a smooth, hard, glossy surface with no surfacing wax and no PVA over the top.

It is the fix for the dull, low-gloss ring that shows around the edge of a gelcoat repair, and it lays down flatter than straight gelcoat or gelcoat cut with wax and styrene. Use it for gelcoat repair, full gelcoat resurfacing, and plug and pattern work. Blended into tooling gelcoat at 10 to 25%, it improves flow and air release for a mold surface with less porosity.

Blend 1 part additive to 1 part gelcoat for repairs where color hide is not an issue, or 1 part additive to 3 parts gelcoat when you need the most hide. With dark, rich colors, spray the build coats in straight gelcoat and finish with the 1 to 1 blend. Catalyze the whole blend at 2% MEKP. The surface is sandable in roughly 2 to 4 hours. Leave it open for 8 hours after the first sanding, then work up through 400, 600, 800 and 1000 grit and polish.

It works with most gelcoats, but every gelcoat cures a little differently, so run a small test blend before the real job. Keep the shop and the part above 64 F. It can be used anywhere gelcoat is used. Where the surface will sit in the water long term, finish with the 1 to 1 blend for the last 10 mil or more so the surface cures closed.

Both sizes ship with MEKP catalyst.

Specifications

ColorClear

Part Number904-001

Product TypeClear polyester gelcoat additive, air cure

Blend for Standard Repair1 part additive to 1 part gelcoat, where opacity is not an issue

Blend for Best Hide1 part additive to 3 parts gelcoat

Dark ColorsBuild coats in straight gelcoat, then 1 to 1 blend for the final 10 to 12 mil

Blend for Tooling Gelcoat10 to 25% additive

CatalystMEKP at 2% of the full blend; included

Gel Time14 to 18 minutes at 77 F, additive alone at 2% MEKP

Weight per Gallon8.54 lb

Solids Content52%

HAPs34% by weight

Film Build8 mil or more over a repair with the 1 to 1 blend; 12 to 15 mil in 3 to 4 passes with the 1 to 3 blend; 18 mil or more at 5 to 7 mil per pass on a full surface

Spray Tip2.0 mm or smaller for thin blends, 2.5 mm or larger for thick blends

Spray Pressure34 to 42 psi at the gun

Minimum Application Temperature64 F, shop and part

SandableAbout 2 to 4 hours, varies with the gelcoat

PolishingLeave open at least 8 hours after the first sanding

Sanding Sequence400, 600, 800, 1000 grit, then compound and polish

Shelf Life6 months from the manufacture date on the can, unopened, stored out of sunlight at 77 F or below

SizesQuart and gallon, each with MEKP catalyst

Includes

Duratec 904-001 Clear Hi-Gloss Additive, 1 quart or 1 gallon by the size selected
MEKP catalyst

Features

Converts gelcoat to air cure: no surfacing wax and no PVA needed
Removes the dull, low-gloss ring at the edge of gelcoat repairs
Lays down flatter and smoother than straight gelcoat or gelcoat with wax and styrene
Thins the blend so gelcoat sprays like paint
Cures fast and hard, and sands easily
Reduces porosity in tooling gelcoat at 10 to 25%
MEKP catalyst included with both sizes

View full details

Duratec Hi-Gloss Additive blend ratios: 1 to 1 for standard repair, 1 to 3 for best hide, 10 to 25% in tooling gelcoat

What ratio do I mix Duratec Hi-Gloss Additive with gelcoat?

Use 1 part additive to 1 part gelcoat for repairs where opacity is not an issue. Use 1 part additive to 3 parts gelcoat when you need the most color hide.

With dark, rich colors such as black, blue or red, the additive thins the pigment load. Spray the build coats in straight gelcoat and use the 1 to 1 blend for the final 10 to 12 mil.

To upgrade tooling gelcoat, blend in 10 to 25% additive.

Do I still need wax or PVA over the repair?

No. The additive converts the gelcoat to air cure, so the blend cures tack free in open air without surfacing wax in the mix and without PVA sprayed over it.

How much MEKP does the blend need?

Both the gelcoat and the additive need catalyst. Catalyze the full blend at 2% with full strength MEKP, measured by weight or with an MEKP dispenser.

Mix only what you will use inside the gel time of the gelcoat, about 15 minutes.

Will it work with my gelcoat?

It works well with most gelcoats, but every gelcoat and color cures a little differently. Run a small test blend and a cup gel test first.

If a blend fails to cure, check the gelcoat and the additive separately. If each cures on its own, the two are not compatible.

What tip size should I spray the blend with?

The additive thins the gelcoat. A thin blend flows best and resists orange peel through a 2.0 mm or smaller tip. A thicker blend needs a 2.5 mm or larger tip. Set air pressure at 34 to 42 psi.

When can I sand and polish?

Sand when the surface has cured enough not to clog the paper, roughly 2 to 4 hours. With a good spray finish you can start at 400 grit.

Leave the surface open for at least 8 hours between the first sanding and polishing, then finish through 600, 800 and 1000 grit and compound.

Can the blend be used below the waterline?

The additive can be used wherever gelcoat is used. On areas with long-term water exposure, use the 1 to 1 blend on the final passes, 10 mil or more, so the surface cures closed and fully hard.