IOTA HCR 960 U is a silicone master-batch, heat vulcanizing under heat after addition of a vulcanizing agent (chosen according to the transformation process).
IOTA HCR 950 U is a silicone master-batch, heat vulcanizing after the addition of a vulcanizing agent (chosen according to the transformation process).
IOTA HCR 940 U is a silicone master-batch, heat vulcanizing after the addition of a vulcanizing agent (chosen according to the transformation process).