Can water go through the ASTRA-GLAZE-SW® + face?
No, it is impervious to water. Tests have been conducted using high pressure steam and no measurable penetration was recorded. All blocks used for glazing contain W.R.Grace DRY-BLOCK® water repellent additive to provide additional protection should water penetrate the wall through the mortar joints. Note: Any scores on the face of ASTRA-GLAZE-SW® + blocks must be tuckpointed or water will, of course, penetrate through the scores.
