Silanes are made up of smaller molecules than siloxanes, they typically will obtain deeper penetration than siloxanes. Silane/siloxanes perform well under abrasion and weathering.
Follow the instructions and apply late afternoon /early evening this allows penetration before evaporation.

Pressure washed the concrete driveway (16 x 60), 24 hrs later, pump up sprayer= two applications with one 5 gallon pail.