Around 30 mins, the strength of the gypsum can reach 5000 ~ 9000 psi (350~630 kgf/cm2)
This type of gypsum is mostly use in the capping material for concrete compression test according
to ASTM C617 standard, so our high strength capping gypsum helps offer the convenience and
excellent testing material for civil engineering industry.

Type Available : S-350 and S420