Recycled silicone catheter filled Standard Malaysian Rubber (SMR L/rSC) vulcanizates with five different recycled silicone catheter (rSC) loading (5, 15, 25, 35 and 50phr) with two particle sizes; fine (300-600mm) and coarse (1-2 cm) were prepared. The effects on cure characteristics (scorch time, cure time, minimum and maximum torque), and swelling behaviour of SMR L/rSC vulcanizates were studied. The results show that both scorch time (t₂) and cure time (t₉₀) for SMR L/rSC fine (SMR L/rSC F) and coarse (SMR L/rSC C) vulcanizates decreased as rSC content increased. It can be explained by the existence of the crosslinked precursors and unreacted curatives in recycled rubber. Meanwhile, the minimum torque (M_L) and maximum torque (M_H) of SMR L/rSC vulcanizates increased with increasing rSC loading. At similar loading, SMR L/ rSC fine vulcanizates exhibit shorter scorch and cure time and lower minimum and maximum torque compared to SMR L/rSC coarse vulcanizates. The results also show that the swelling percentage of SMR L/ rSC fine vulcanizate were lower than that of SMR L/ rSC coarse vulcanizates. This attributed to better incorporation between rSC fine and SMR L rubber matrix.