W-25 Mid Range Water Reducer

Cost effective water reducing plasticizer provides an ideal balance of flowability and surface appearance. Complies with ASTM C-494 Type F specifications


W-25 is a multi-component water-reducing admixture which can be used over a wide concrete slump range. W-25 water reducer allows ideal mid-range water reduction of 5-20% depending on dosage rate. W-25 water reducer will allow easy flowability and pumping of high slump concrete with increased early and final strengths. W-25 water reducer can be used in ready mix, mobile mix, block, precast, prestressed, concrete, mortars, and grouts.


  • Superior workability and finishing with reduced water content for a given slump
  • Compressive and flexural strength increases at all ages
  • Ideal choice for precast counter or table tops, due to decreased bleeding & segregation
  • Provides denser concrete with increased durability against damage freeze/thaw damage

COMPOSITION: Low viscosity modified lignosulfonate based solution. W-25 water reducer does not contain any calcium chloride or intentionally added chlorides that would initiate or promote corrosion of reinforcement steel, or contribute to efflorescence.

TECHNICAL DATA: W-25 water reducer is formulated to comply with ASTM C-494 Type A and F guidelines. W-25 water reducer is typically dosed at 8-24 oz. per 100 lbs. of cement (520-1560 ml/100 kg) for most applications. The dosage can be increased as needed to allow more flowability along with corresponding higher percents of water reduction. Specco recommends a field test or trial mix be run in order to determine the optimum dosage needed for the specified slump requirements.

SHIPPING NAME: Concrete Admixture Water base – Not regulated


AVAILABLE IN: 5 gallon (18.9 L) pails, 55 gallon (208 L) drums, 265 gallon (1000 L) containers.