In reply to allanscott:
From the Scarpa web site:
K-TECH/L-TECH/S-TECH-example-Phantom Series/Charmoz Pro/Rebel Lite
A Kevlar based synthetic material which ensures maximum durability with minimum weight. Combined with S-Tech this allows us to achieve a lightweight boot which is strong enough for summer and winter mountaineering, scrambling and Via Ferrata. We recommend using Nikwax Fabric and Leather or Grangers G-Max periodically to ensure that the highest level of water resistance is maintained
Don't see how you can be expected to check the web site BUT did they have any care notes in the box since Scarpa generally do.
However their web site merely recommends and also merely says highest level of water resistance. It doesn't say you have to do it in order to keep them water proof.