NBS Source


Hardening accelerator for concrete which increases the early strength of concrete without reducing the ultimate strength.

General information


Pr_20_31_03_36 Hardening and accelerating concrete admixturesPrimary


E10/418 Proprietary admixture

E11/435 Proprietary admixture

Product range

Concrete Admixtures

Specification data - Hardening and accelerating concrete admixtures

Product Reference

Sika Rapid 1 Hardening Accelerator

Suitable for concrete.

Sika Rapid 2 Hardening Accelerator

Low alkali, suitable for concrete and mortar.

Standard product features


Increases high early stage strength development at 6–24 hours.