Drying Concerns

TB 43-0242

Component A to one part of Component B. Using more

3-6. Drying Concerns. CARC dries as solvents

or less of Component B won't make the paint dry quicker

evaporate. Then it cures, a chemical reaction. Other

or produce a better coating. In fact, if you use the wrong

paints, like lacquers, only dry as the solvent evaporates.

proportions, you may end up with paint that peels right

CARC will cure at temperatures below 60 ° , but it takes

off.

much longer. At temperatures over 100 ° , you may

need to add thinner to slow the drying time so you can

3-8. One-part CARC. You can use the onepart

get a smooth coat.

polyurethane topcoat for spot painting. There's no

mixing of components-but you still have to stir it well. If

3-7. Coverage. Mix up only as much paint or

you don't use the entire can, you may be able to save

precoating as you need. A quart of

what's left overnight. Just close the can tightly. When

you open the can the next day, remove any skin that

may have formed on the surface of the paint. Stir the

remainder well, and use it.

3-9. Epoxy Curing. Once you mix the epoxy primer or

two component topcoat, they start hardening-curing-and

nothing can stop it. You have about 15 hours for the

epoxy or 8 hours for the topcoat to use them after

mixing.

3-10. Time Line. Here's a time line showing how long

each step takes to cure, how long you've got until the

polyurethane topcoat, epoxy primer or epoxy enamel

next step must be started and the maximum time

will cover about 100 square feet. If you're painting more

allowable between steps.

or less than that, you can use the two-component

topcoat. Stir each component thoroughly, then measure

outwhat you need. Be sure that you mix the two parts of

the epoxy primer or twocomponent topcoat in the proper

proportion. For most products, that's four parts of

4 hours or less 30 min to

30 min to 7 days

7-14 days

24 hours

(within 24 hours

4-6 hours

if possible) 30 min

Prepare surface; Wipe with

Apply Apply Dry to Dry

Cured

feather edge.

thinner.

primer topcoat touch through

Wash with Coat with

detergent coating

and water. compound.