WESTON® 398 phosphite by SI Group is phosphite antioxidant stabilizer for HDPE, LLDPE, SBR, ABS and PVC. It improves the color and processing stability during recovery, drying, compounding... view more

WESTON® 504 by SI Group is a blend of 80% Weston TNPP phosphite and 20% Ultranox 27. It eliminates the pre-blending of antioxidants. It minimizes the risk of compounding errors and variability... view more

WESTON® 504B by SI Group is a blend of 80% Weston TNPP phosphite and 20% Ultranox 27. It eliminates the pre-blending of antioxidants. WESTON® 504B minimizes the risk of compounding errors and... view more