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Skip Navigation LinksEN Home > ARDEX Americas > Media Center  > HENRY Adhesives Establish New Benchmark for RH and pH Rating

 HENRY Adhesives Establish New Benchmark for RH and pH Rating

Pittsburgh, Pa.,- HENRY Adhesives, known for setting industry standards in flooring adhesive products, announced significant enhancements to their adhesive line. 
“HENRY® 420 Clear VCT Floor Adhesive joins HENRY® 622,430 and 640 as a high-moisture adhesive,” said Michael Crouch, ARDEX Americas Chief Marketing Officer.  He added “All four adhesives are approved for use over concrete substrates with a maximum RH of 90% and a maximum pH of 11.”   
All other HENRY adhesives are now approved for use over concrete substrates with maximum RH of 85% (ASTM F2170) and a maximum pH of 10 up from previously published maximums of 75% RH and pH of 9.
”These higher standards instill an even greater level of confidence in HENRY Adhesives,” said Stephan M. Liozu, ARDEX Americas President and CEO. “Such a quantifiable measure of performance raises the bar for a new industry benchmark in high-moisture adhesives.”
For additional questions, please contact the ARDEX Technical Department at (888) 512-7339 or visit for complete product information.
The W.W. Henry Company is a wholly owned subsidiary of ARDEX Americas and a leading manufacturer of premium flooring adhesives and substrate preparation products. For more than 75 years, professional commercial and residential flooring installers have relied upon The W.W. Henry Company as a valued partner for innovative, high-performance flooring installation products that are backed by unmatched customer service and expert technical support.
For more information on The W.W. Henry Company please visit or call 1-866-443-4455.