XK ® -CBT is based on comb polymer technology and is a generation of admixture that is specially formulated for slump retention. Along with polycarboxylate superplasticizer added into concrete, XK ® -III has been created to produce superior slump retention. 

XK ® -CBT contains no formaldehyde, calcium chloride or other purposely added chlorides, and will not initiate or encourage the corrosion of the steel present in the concrete. XK ® -III is formulated to comply with the subsequent specifications for concrete admixture: ASTM494, Type F; BS EN934:2/3.2.3.