Introduction
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CDR-S is a styrene–butadiene latex (SBR) additive produced by emulsion polymerization, designed for oil-well cement slurries. It improves chemical and mechanical stability of the slurry and helps enhance anti gas-channeling performance during cementing. CDR-S is formulated to deliver stable slurry behavior under typical cementing conditions and can be applied in saltwater slurries where salt tolerance is required.

Applications / Functions
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• Enhances anti gas migration / anti gas-channeling performance in cement slurry

• Improves slurry stability and helps reduce demulsification risk

• Supports fluid-loss control, helping reduce the dependency on other water-loss additives

• Compatible with a wide range of oil-well cements and common cement additives

• Suitable for saltwater cement slurries requiring improved tolerance and stability

Advantages
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• Designed to improve gas-blocking performance for higher cement integrity

• Good compatibility with oil-well cement systems and additive packages

• Salt-tolerant, applicable in saltwater slurry formulations

• Helps achieve low free fluid and stable slurry behavior

• Supports a short thickening transition (approaching right-angle thickening), beneficial for placement quality

Recommended Treatment
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Typical dosage: (optimize based on cement design, temperature, density, and field performance targets)

• 3–10% BWOS

Package
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• 25 kg sack

• Custom packaging available upon request