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1 part vs 2 part clear Urethane top coat?

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slackdaddy1

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Searched and can not find info on the performance difference between 1 part and 2 part Urethane clear top coats.

Can anyone clue me in ?

thanks,
Nick
 
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LegacyIndustrial

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Both (if solvent based) are generally good. Single part urethanes, if they are moisture cured, are technically not single component. They rely upon moisture in the atmosphere to catalyze.

Our strongest urethane is our single component, moisture cured urethane.
 
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Antoddio

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LegacyIndustrial said:
Both (if solvent based) are generally good. Single part urethanes, if they are moisture cured, are technically not single component. They rely upon moisture in the atmosphere to catalyze.

Our strongest urethane is our single component, moisture cured urethane.
Click to expand...

You are not a fan of the non-solvent based urethanes?

Does it matter if they are aromatic or aliphatic?
 
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slackdaddy1

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Antoddio

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Looks like the 1 part has a little bit of a longer work and initial dry time, however is easier because you don't have to mix it. Though once you open a can of 1 part, you have to use it all up, as it doesn't take being stored after opening very well...or at least that's what they say. Otherwise the performance characteristics look fairly close.
 
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