Some use a caulking gun, but I don't.
Just squeeze plenty to get a thick bead and move at a steady pace.
If there is a tip like RTV has, cut it back to about 1/4 inch opening.
If you screw up really bad it's not hard to start over.:D
BTW, if you get ANY coolant in the motor dab it out of the lifter valley and do not start the motor until you either change the oil or at least pull the drain plug just enough to let any out before you start it. (coolant sinks to the bottom in oil)
Coolant is HORRIBLE for babbit bearings.
