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Low Temperature Paint?

thread332-171877

Low Temperature Paint?

Low Temperature Paint?

(OP)
Can anyone tell me what type of paint would be
best for cold weather application to structural
steel?  We are erecting a metal building that
will see corrosive fumes and we want to paint all
the red-iron with a top-coat before installing
the roofing and siding.

The original plan was to spray a coating of two-
component urethane onto the structure, but the
project got delayed and now the steel is going up
in cold weather.  Is there another coating that
would be friendlier to cold-weather application?

We will probably wait until the building is closed
in and heated to paint the inside surfaces of the
steel, but we have no choice but to paint the
inaccessible surfaces now.

I would appreciate any ideas.
Replies continue below

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RE: Low Temperature Paint?

Epoxy and polyurethane coatings are the best choices. Most of them stop curing at temperatures below 40F. A few of the epoxy materials will cure below zero. I caution you that virtually all the coatings will require application over an abrasive blasted surface. After blasting, and while coatings are applied the metal surface must remain completly dry. Moisture from rain or snow will be a disaster.

Brent Bergman
techno Coatings, Inc.

RE: Low Temperature Paint?

(OP)
I found a product called "Macropoxy 846 Winter Grade Epoxy" that sounds like it might do the trick.

Thanks for the help.

RE: Low Temperature Paint?

Ther are many coatings that will work but the first thing you need to do is look under that shop primer. I'm willing to bet that the primer was applied over mil scale. If i'm right it doesn't matter what top coats you use they will all fail if you do not blast off the mil scale.

RE: Low Temperature Paint?

If your project has been delayed be sure to investigate the recoat time for the primer too.  It is possible that the recoat window has been exceeded.

Joe Tank

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