sdst HDB lift buttons

Town councils across Singapore have coated 1.5 million lift buttons inside 26,000 HDB lifts and lift lobbies. Image: Changi Foundation

A self-disinfecting coating has been sprayed on lift buttons in Singapore’s Housing and Development Board (HDB) blocks, as a safeguard against viruses, fungi and bacteria.

Town councils across Singapore have coated 1.5 million lift buttons inside 26,000 HDB lifts and lift lobbies, reported CNA.

This comes as Changi Foundation, the philanthropic arm of Changi Airport Group (CAG), donated 650 litres of coating, known as sdst, to all 16 town councils.

Changi Foundation explained that the coating is safe on human skin, eco-friendly and could last for three months.

“The sdst coating is effective in two ways. Firstly, it has a needle-like structure that ruptures the outer membrane of viruses, bacteria and fungi, thereby reducing their ability to infect,” said CAG in a release.

“Secondly, proprietary bonding agents in the coating allow it to adhere tightly to surfaces at a molecular level, such that even with repeated scrubbing and cleaning, the coating does not leach and remains effective for as long as three months.”

CAG revealed that the trials it had conducted showed that the coating effectively provides longer-lasting protection on frequently touched surfaces.

CAG had applied sdst on frequently-touched surfaces in Changi Airport such as door handles, lift buttons, trolley handles and touch screens in February.

“We have stepped up efforts to clean and disinfect our blocks so as to reduce bacteria and virus transmission in view of [the] COVID-19 situation,” said PAP Town Councils Coordinating Chairman Dr Teo Ho Pin.

“The use of this new protective self-disinfecting coating on our lift buttons will further reduce bacteria and virus transmission.”

However, Dr Teo called on members of the public not to use pointed objects, like keys, when pressing the buttons since hard objects could scrape the coating off.

Changi Foundation’s donation comes after Temasek Foundation distributed 500ml of hand sanitisers to each Singapore household.

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Victor Kang, Digital Content Specialist at PropertyGuru, edited this story. To contact him about this or other stories, email