Water beading on a surface is not only a nice thing to watch, it helps to keep surfaces dry.
Beading test on a Silicone treated concrete block.

Testing water penetration over a prolonged time, like 24 hours, using the Rilem (also called Karsten) tube is a good indication for the performance of a water repellent.

Water penetration test using a horizonzal Rilem tube

Adhesion testing and rheology of sealants

For details or other tests available please contact us.