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I READ with some disbelief the report about three workers killed by toxic fumes from the coating system that they were applying to a culvert under a bridge on Choa Chu Kang Way (ST, March 15).
As a retired paint-industry professional living in Thailand, I am dismayed at not only the deaths of the Thai workers but also the fact that they died applying a product that should not be used for this type of application.
Water-based products are typically specified for such applications as they not only perform better but are also much safer for the workers to apply.
On a recent trip to Singapore, I noticed underpasses and tunnels being painted and I was amazed that solvent-based products were again being used, instead of water-based paint.
If a motor accident occurs in a tunnel and there is a fire, motorists who survived the accident and fire would struggle to live through the high-alkaline content of the fumes emitted from the burning solvent-based coatings. There are recorded incidents of this occurring in Europe.
Lindsey Wallace (Ms) Phuket, Thailand
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