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What do I need to add to Sto Powerwall Stucco before applying it to the wall?

April 26, 2017powerwall STO stucco wall

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What do I need to add to Sto Powerwall Stucco before applying it to the wall?

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200 lbs. (91 kg) of clean graded sand are added to an 80 lb. (36 kg) bag of Sto Powerwall Stucco. The sand should meet the requirements of ASTM C 897. Water is also added to make the final stucco mix. Where polymer modification is desired to enhance the physical properties of Sto Powerwall Stucco, Sto Bonding Agent may also be added to the stucco mix.