Fishstone Concrete Countertop Supply has introduced the new Optimum 380 Premier Superplasticizer for concrete countertop manufacture. The plasticizer is a modified polycarboxilate high range water reducing admixture formulated to deliver high spread rates with “self placing” properties. It reportedly delivers higher early strength, improved workability and surface densification with lower dosage rates. Water to cement ratios can be reduced by as much as 25 to 30 percent. It is available in 1-quart, 1-gallon, 5-gallon and 55-gallon sizes. Dosage rating is 3 to 5 oz. per 100lbs. of cement material.