Concrete masonry walls produced with the RainBloc integral water repellent resist wind-driven rain while still maintaining vapor transmission, reducing the chance of mold, mildew, and musty smells from developing inside a building. 
 
When used as an integral ingredient in our concrete masonry products, RainBloc provides protection throughout the masonry unit to protect concrete masonry walls from moisture penetration.
 
To ensure your masonry wall system is completely water repellent you must remember to include the
Rainbloc additive to the masonry mortar on site. Specify RainBloc Water Repellent System when 
designing with Finesse, Profile Series or Standard and Architectural Block.
 
 
 
Untreated wall after ASTM E514 Test.
 
RainBloc® System after ASTM E514 Test.
 
 

ASTM Standards and Tests

RainBloc® for Mortar Performance in ASTM Standards and Tests RainBloc® for Mortar meets or exceeds the Performance requirements for high quality masonry mortar water repellents when tested and evaluated according to ASTM C 1384, “Standard Specification for Admixtures for Masonry Mortars”. When measured by ASTM C 1072, “Standard Test Method for Measurement of Masonry Flexural Bond Strength”, the RainBloc® Integral Water Repellent System does not adversely affect mortar bond. [Ref #1]


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RainBloc® for Mortar

RainBloc® for Mortar is a liquid admixture used at the masonry construction site to make mortar. RainBloc® for Mortar should only be used with concrete or clay
masonry units manufactured with RainBloc® water repellent additive in exterior masonry wall construction. To ensure your masonry wall system is completely water repellent you must remember to include the Rainbloc additive to the masonry mortar on site. 
 

 

[1] RainBloc Brochure, Rain Water Penetration Resistance for Masonry Construction, pg 2. ACM Chemistries Inc, Norcross GA