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There are thin set mortars (ANSI 118.1) and latex modified thin set mortars (ANSI 118.4 or 118.11). What is the difference?

April 26, 2017ANSI latex modified mortars

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There are thin set mortars (ANSI 118.1) and latex modified thin set mortars (ANSI 118.4 or 118.11). What is the difference?

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A. The addition of latex is the main difference in these two types of products. Latex modified thin sets are required for installations involving difficult to bond to substrates (EGP, Vinyl tile, ceramic tile). They are also required for installing difficult to bond to tile (porcelain) and for all exterior applications. Non-latex modified thin sets (ANSI 118.1) can be used for interior applications on concrete, masonry, cement board, drywall, and mortar beds except when porcelain tile is being installed.