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.
STABILA Renews Cornerstone Partnership in 2026
October 2025

Bon Tool Retains Silver Partnership in 2026 MAP
October 2025

The Mason Contractors Association of America (MCAA) is delighted to announce that Bon Tool has renewed its Silver partnership for the 2026 Masonry Alliance Program.

The Concrete Masonry Checkoff Announces Its 5 Regional Technical Directors for the Block Design Collective
October 2025

The Mason Contractors Association of America is excited to announce the completion of the Concrete Masonry Checkoff’s national technical support team. With five Regional Technical Directors now in place, the Block Design Collective (BDC) is fully equipped

General Shale Renews as a Gold
October 2025

The Mason Contractors Association of America (MCAA) is happy to announce that General Shale will be renewing its Gold partnership in the 2026 Masonry Alliance Program.