The Tubular Tire gluing process is simple.
Vittoria Mastik One adhesive is preferred and proven.
Use a Plumber's Flux Brush(.25 cents) to brush the glue onto the Rim and Tire.
Let dry to a tack(about 20 minutes)
Assemble the tire and rim.
The glue should be applied to the carried spare tubular tire so that it will be ready if needed.
No Mess. . .
I have never in many years had a tire seperate from the rim during recreational/club riding.
Consider This:
http://draco.acs.uci.edu/rbfaq/FAQ/8b.19.html