Water Repellent Mortar

Words: Dan Kamys

Amerimix Water Repellent Mortar www.amerimix.com

Amerimix Water Repellent Mortar with RainBloc GP is part of the total RainBloc system. When used with concrete masonry units that contain RainBloc, it creates a wall system that has been proven in both the lab and on jobsites to inhibit water penetration, creating a superior moisture barrier. RainBloc GP is the only patented, mortar admixture that is traceable, detectable, and measureable in hardened mortar. Available in portland, lime, and sand (AMX 410 WRM) and masonry cement and sand (AMX 510 WRM). The series of mortars includes the following features:

  • Traceable, detectable and measurable
  • RainBloc GP is proportioned correctly in every batch
  • Exceeds water repellency requirements of the “Upload Test” specified in ASTM C 1384
  • When used in conjunction with concrete masonry units manufactured with RainBloc, the National Concrete Masonry Association Rated this wall assembly “E” for excellent using ASTM E 514.
URGENT: Only One Cornerstone Spot Remains in the 2026 Masonry Alliance Program
May 2026

The Mason Contractors Association of America (MCAA) is thrilled to announce that the 2026 Masonry Alliance Program (MAP) has reached a critical stage of exclusivity.

The Compliance Shield: Navigating the New Standards of Field Oversight
May 2026

The modern job site is undergoing a quiet but significant transformation. While the physical act of laying a block remains the core of the trade, the environment surrounding that work is becoming increasingly data-driven. We are moving away from the era o

When GEORGE Met BOB: Ironsite Is MCAA's First AI-Centered Cornerstone Partner
May 2026

Earlier this year at World of Concrete, I taught the AI Test Drive class and gave attendees an early look at GEORGE 3.0, which we're set to release later this year. As I was wrapping up the session and people were still asking questions, the team from Iro

Ironsite Joins Masonry Alliance Program as Newest Cornerstone Partner
May 2026

The Mason Contractors Association of America (MCAA) is thrilled to announce that Ironsite will be joining the Masonry Alliance Program (MAP) at the Cornerstone level.