The stone should be completely dry for the sealer to work at its best. If the stone is still wet the sealer will not penetrate areas were water is present and therefore that portion of the stone will be unsealed. If the stone has some moisture(damp), the impregnator may have some effect but I would recommend re-applying after stone has had time to dry.
CAUTION If an impregnator is applied to a wet surface it may cause spotting due to the scattered penetration. If this occurs it may be very difficult to repair.
Article ID: 687
Created: January 21, 2022
Last Updated: January 7, 2023
Author: Pam Freitag
Online URL: https://sr-manual.com/kb/article/why-you-should-apply-impregnator-to-stone-when-it-s-dry-687.html