The Valspar Corporation

William W Tao

Matthew Steward Gebhard

Sanford Lee Hertz

Jason J Netherton

Ed Daraskevich

T Howard Killilea

Kevin W Evanson

The present invention provides compositions and methods which are adapted to impart color to concrete or mineral substrate surfaces. Specifically, the present invention relates to a composition and methods adapted to treat concrete surfaces which have the advantage of using a non-corrosive acid-based solution.

Weak acid based concrete stain

The present invention provides acidic compositions and methods that are adapted to impart color to cementitious or mineral substrate surfaces. Specifically, the present invention relates to acidic compositions and methods adapted to treat cementitious or mineral substrate surfaces that have the advantage of using a less corrosive acid-based solution. The acidic composition incorporates species including a weak base in equilibrium with a conjugate acid. The presence of such species moderates the corrosive behavior of the acid while still allowing excellent coloring action to occur.

Concrete coloring compositions and methods

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Downers Grove, IL, United States of America

William W Tao