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.
Terminations: The Hardest Part of Leadership
May 2026

Throughout my career, I’ve faced a wide variety of challenges, some technical, some interpersonal, and many that forced me to adapt quickly. These days, most of my work is behind a computer in an office, but the lessons I’ve learned apply wherever I go.

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

PROSOCO Breaks New Ground With ICC‑ES Listing For Blok‑Guard and Anti‑Graffiti Products
May 2026

After years of pushing to raise the bar on third‑party verification, PROSOCO has reached another industry milestone, this time for anti‑graffiti and surface protection technologies.

Elevating Masonry: Old Habits, Familiar Tools, and the Real Reason Masonry Contractors Aren’t Making the Switch
May 2026

Ask a masonry contractor how they run their jobsite, and the answer probably sounds familiar: paper logs, a flurry of texts, maybe a shared email thread. It works until it doesn’t. And yet, even as purpose-built field management software has become more a