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Contact SupplierExo-14 Exo-16 Hi-APC-10 In case of pouring liquid metal in the mould, casting cools at a slower rate than the riser metal. While cooling, casting metal shrinks & the metal is feeded from the riser. But the riser metal is cooling at a faster rate. Hence to keep riser metal in the liquid form for feeding the casting, EXO-16 is used. The moment riser is filled with the metal, EXO-16 is spread over the riser surface. EXO-16 starts burning after few seconds. The activity count of 65 is adjusted so as to generate heat & keep riser metal hot at a latter stage. EXO-16 swells and provides a insulating layer to retain the heat generated & helps in feeding the casting. EXO-16 is recommended for all riser sizes above 3" and heavy castings.