In the manufacture or repair of products in the home often have to glue the parts (and more parts) of various materials relevant brands of glue, good in selling their great variety — from generic to special. But an indispensable condition for the quality of the joining parts, even superglue are the need to fasten tightly pressed surfaces, and aging them under pressure to complete drying or polymerization of the binder is from several minutes to days, depending on the brand of glue and applied technology.
If the surface is flat or steep, then dock them together is a snap with the help of clamps or a suitable load. But in practice it is often necessary to glue together a complex curved surface inelastic (soft) parts, uniform pressing of which to each other to provide a challenge even under pressure.
In such a situation, can save… regular sugar (or any granular material, for example — available grits).
If you use sand, it should be dried to become “fluid”, and sifting, separating of large inclusions: pebbles, pebbles.