Siam Cement Halts Vietnam Petrochemical Plant Amid Iran War Supply Disruptions

Bearish (-0.7)Impact: High

Published on April 25, 2026 (4 hours ago) · By Vibe Trader

Thailand's Siam Cement Group (SCG) has announced the suspension of operations at its Vietnam ethylene plant due to supply chain issues directly linked to the ongoing war in Iran [1]. The company cited supply constraints stemming from the conflict as the primary reason for halting production, with expectations of monthly losses exceeding $7 million as a result of the shutdown [1]. This is the second petrochemical plant in Vietnam to suspend operations in response to supply disruptions associated with the Iran conflict, highlighting the broader impact on energy and materials markets across Southeast Asia [1].

Financially, SCG faces significant pressure, with monthly losses projected at over $7 million due to the suspension [1]. The company warned that supply chain interruptions are likely to persist as long as the Iran war continues, which could further increase input costs for manufacturers dependent on Middle Eastern feedstocks [1].

Market analysts note that the halt in Vietnam ethylene production is expected to tighten the regional supply of petrochemicals, potentially driving up prices for downstream products [1]. Southeast Asian manufacturers are preparing for further disruptions and cost increases, with industry players warning of prolonged impacts if the Iran conflict is not resolved soon [1]. An SCG spokesperson stated, "We are doing everything possible to mitigate losses and secure alternative supplies, but the situation remains highly uncertain," reflecting the market's cautious sentiment [1].

Market participants are advised to closely monitor supply chain developments and anticipate volatility in petrochemical prices [1]. The article suggests that support levels for regional petrochemical stocks may be tested if supply disruptions persist, while resistance could emerge if alternative feedstock sources are secured [1].

CONCLUSION

Siam Cement Group's suspension of its Vietnam ethylene plant underscores the significant impact of the Iran war on Southeast Asia's petrochemical supply chains. With monthly losses exceeding $7 million and ongoing uncertainty, the market is bracing for further volatility and potential price increases in downstream products. Industry participants are advised to remain vigilant as the situation develops.

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