Urethane cure time

pat sublett · Oct 24, 2013

I know there are variations depending on brand and quality but, basically how long does it take urethane enamel to reach its maximum hardness. The specific brand that I am using is Martin Senour (Napa) Crossfire.

glennster · Oct 25, 2013

crossfire is generally an overnight dry time, at 70 degrees or better. forced air (spray booth) can be baked and dry in 4 hours. maximum hardness is in about 7 days.

David G · Oct 25, 2013

glennster probably has the cure time right, I have never looked at it, but I usually consider the paint to be dust free in about an hour.

pat sublett · Oct 25, 2013

Thanks very much

56flatbed · Oct 25, 2013

(quoted from post at 10:35:41 10/24/13) I know there are variations depending on brand and quality but, basically how long does it take urethane enamel to reach its maximum hardness. The specific brand that I am using is Martin Senour (Napa) Crossfire.

Pat, go to www.martinsenour-autopaint.coM
Click on cross fire in paint systems. The product data sheets will give you all the info you are looking for. You will need to know your product number which will be on the label your NAPA store put on the can.

Wally

56flatbed · Oct 25, 2013

I saw your earlier post and checked the 55a. It is document # MA4644. If you click on the blue highlighted number in the listing, it will bring up the PDS for your paint.

Air dry at 70* is 80 min. tape free in 12 hours, colorsand and buff after 24 hours.

I recently retired from NAPA, and as a courtesy, we printed the PDS for every paint order, for every customer. Ask your paint guy for a copy.

If you have any questions, I'm happy to help if I can.

Wally

dr sportster · Oct 25, 2013

Like flatbed said always read the tech sheets .Write down notes on a file card to keep in your pocket while working. Everything you want to know from dry time between coats to total cure time is in those sheets which are posted on line.The spec you want is the cure time.

Brad_bb · Oct 28, 2013

As far as I know, it's "acrylic urethane". I've never heard enamel put with it. I don't believe urethane enamel is a correct term.

Definitely overnight. If you can wait 5 or 6 weeks before wet sanding and buffing, you'll get the best results. Not always possible, but works for show cars. Also, don't wash it for 6 weeks, carwash or by hand.

Urethane cure time

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