TA 31 silicone question

I used it on the ends of the manifold. Now how long after installing the manifold do you have to let the TA 31 set ? 1 hour, 8 hours or is it best to let it sit overnight ?

Thanks in advance,
John

Stuffs pretty tough, I give it 4-6 hours and let'er rip.

Just has a PCV and breather. Dark here now so it will sit overnight. I hate freakin leaks
Engine isn't high enough horsepower to require a vac pump.

Thanks guys