Starvis® 3003 F by BASF is a viscosity modifying admixture. It is used for stabilization of very fluid cement based mixtures, to prevent bleeding and segregation. It is essentially the opposite of a high range water reducer (superplasticizer).
The dosage recommendation is 0.05 – 0.20% by weight of cementitious material. In practice, you can sprinkle a tiny pinch into your mix, mix for 30 seconds, observe the viscosity, then add more very gradually if needed. Care should be taken not to use too much, but if the concrete does become too stiff, you can counteract the STARVIS and regain some fluidity with superplasticizer.
The shelf life is 4 years when stored dry.
We sell it in 1-pound packages. Starvis is not available from BASF for consumer purchase; it is sold only in large quantities to industry.
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