SBS | Petrochemicals | Product - LG Chem

Mixing procedures for topping and screeds containing Sikabond® SBR+ are similar to those used to conventional compositions, with gauging water partly replaced by Sikabond® SBR+. However, mixing time should be minimised to limit air entrainment. Mixing should be carried out in a forced action mixer. The usual procedure is to pre-mix sand and cement in the mixer, pour in the Sikabond® SBR+, mix for 1 - 3 mins, then slowly add water to the required consistency.
NB. Over-addition of water causes rapid thinning of latex modified mortars owing to the plasticising effect of the latex. The mix design depends upon thickness and intended use. However, typically mixes for a 12 mm topping or screed are as follows:

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                           Screed            Topping
O.P.C                     1                      1
Moist sand           3.5                   1.75
3 mm Washed

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