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.
Hines Market Square
September 2026

Hines Market Square, now known as Aris Market Square, is a mixed-use, multifamily development located in downtown Houston. The architect on this project, Ziegler Cooper, is known for reshaping the urban landscape. In keeping with their vision, the buildin

Making Old Brickwork Look New Again
September 2026

Brickwork is built to last, but mortar isn’t. Over time, exposure to moisture, freeze-thaw cycles, and everyday wear causes joints to crack, crumble, and even recede. What starts as a cosmetic issue can quickly turn into a structural concern if left unadd

Why Joint Profiles Matter In Masonry Restoration
September 2026

For generations, masonry structures have been defined not only by the brick, block, or stone used in construction, but also by the mortar joints that tie everything together. Whether restoring a historic brick facade, repairing natural stone veneer, or re

Designed for the Way Contractors Work Today
September 2026

Every piece of equipment tells a story about the challenges contractors face. For more than 30 years, the EZG Manufacturing team has listened to those stories—through customer relationships, job site visits, dealer feedback, a