A high temperature cement retarder with mild dispersing characteristics. The thermally

stable organic-type blend is designed to perform efficiently in intermediate to high

temperature ranges when used individually. Additionally, VC-R2 is especially effective for

ultra-high temperature ranges when used in combination with co-retarder VC-RE3. In

application, VC-R2 successfully performed in slurries with temperatures of over 300°F

(150°C) when used individually. When combined with VC-RE3, the retarder blend

performance was tested well over 400°F (+200°C). The retarder and co-retarder are well

suited for all API classes of cements.