The best way to determine dry times is to look at guidelines for filler packaging. Deeper fills can take as long as six hours before they are fully affixed to the wood. Shallow repairs involving wood filler will only take 15 minutes to two hours to dry in most cases.
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How To Glue Metal To Wood
This means your application needs to be fast, so it does not harden before you complete the application.
Along with dry time, the cure time will take additional hours.