Silicon containing emulsion powders for use in making cement based on tile adhesive dry mix compositions

A storage stable powder composition for use in making a dry mix composition, wherein the powder composition comprises:

• (i) a water redispersible polymer powder (RDP);
• and,
• (ii) a granular composition of (a) a silicate carrier, (b) a polydiorganosiloxane, (c) a hydrolyzable silane containing a C4 to C12 alkyl group, or an oligomer thereof, and (d) a polymer encapsulant for the hydrolyzable silane and the polydiorganosiloxane, wherein the weight ratio of the total (i) RDP to the total (ii) granular composition ranges from 90:10 to 98:2,
• wherein the (ii) granular composition comprises (a) from 54 to 89 wt. % of the silicate carrier, (b) from 4 to 15 wt. % of the polydiorganosiloxane, (c) from 6.5 to 25 wt. % of the hydrolysable silane, and (d) from 0.5 to 6 wt. % of the polymer encapsulant for the hydrolyzable silane and the polydiorganosiloxane, all weight proportions in the granular composition based on the total weight of the granular composition and adding up to 100%.