Viscosity modified integral retarder for hot weather applications or delay of final set time. Complies with ASTM C-494 Type B specifications.


Specco Original #19R admixture is a neutral, biodegradable, liquid chemical additive designed to offer extended working and setting times in hot weather. The viscosity modifying properties add lubricity and densification to extruded mix systems or low water to cement ratio mix designs in warm or dry weather conditions. These same properties reduce surface bleeding, segregation, shrinkage and cracking that can occur in high slump mixes poured in the same conditions.


EXTENDED WORK TIME: Original #19R allows delays of initial and final set times for extended workability and placement of the mix in hot, dry, windy temperature extremes.

BLEED/SEGREGATION CONTROL: Original #19R decreases surface water bleeding and improves aggregate suspension due to its gelling action. The hydration water is held integrally in the mix (not pushed to the surface), resulting in concrete with reduced capillarity, improved workability and cohesiveness.

SHRINKAGE CONTROL: Original #19R stabilizes the concrete mix and therefore decreases shrinkage potential or surface cracking common in wet mixes or hot, windy weather environments

EASIER FINISHING: Original #19R aids surface finishing in flatwork by holding the hydration water in the matrix for extended times with minimal effects on set time. This allows for easier troweling with less drag or pull on the concrete and stronger compaction at the surface.

EASIER PLACEMENT: Original #19R reduces splashing during concrete placement and adds workability to the concrete without added vibration or screeding. Original #19’R’s hygroscopic gelling action retains moisture and provides a creamy uniformity to the mix.

DECREASED PERMEABILITY: Original #19R provides a volume stabilized “closed cell” concrete structure less susceptible to water intrusion. This results in decreased surface damage from continuous freeze-thaw cycling and increased resistance to attack by deicing chemicals.

IMPROVED SURFACE APPEARANCE: Original #19R intensifies color shades in decorative mixes containing iron oxide colorants resulting in improved appearance, uniformity and easier mixer clean out. Streaking, shade variations and efflorescence formation are reduced or eliminated.

MIX STABILITY: Original #19R provides controlled rheology and volume stability to high slump or S.C.C. modified concrete during transport and placement to prevent segregation and bleed. 

COMPOSITION: Viscosity modified gluconate based solution. Original #19R 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: Independent laboratory test data for Original #19R is available upon request. Original #19R is formulated to comply with ASTM C-494 Type B guidelines. 

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