Loctite 5910 Cure

When reinstalling the gearbox after service. We used Loctite 5910 for the gasket between gearbox and engine.

I can't find any clear information about how long the curing time is on the Loctite 5910. The technical sheet is not clear to me.

We have +18 degrees Celsius in the hangar.

How many hours do we need to let the seal harden before engine start?

And do we need to wait further before we use the engine in flight?