EVONIK CORPORATION › SIPERNAT® 880 SIPERNAT® 880 $0.00 SIPERNAT® 880 is a calcium silicate which is used as a flow and anticaking agent in many applications. Add To Cart Added! SIPERNAT® 880 is a calcium silicate which is used as a flow and anticaking agent in many applications. You Might Also Like SIPERNAT® 22 SIPERNAT® 340 SIPERNAT® D 13 SIPERNAT® 35 SIPERNAT® 350