Physical rubber prices witnessed weakness on Friday due to surging seasonal supply and slumping tire production demand. However, higher crude oil prices increased the production cost of petroleum-based synthetic rubber, which drove demand and supported prices for natural rubber.
Spot prices for the RSS-4 variety fell to Rs 279/kg compared to its previous closing of Rs 281/kg; while the RSS-5 variety declined to Rs 276/kg compared to its previous closing of Rs 278/kg.