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Major refresh for Perth’s Iconic DNA Tower

Major refresh for Perth’s Iconic DNA Tower

After 55 years in the intense Perth sunshine, the Kings Park DNA tower could be forgiven for looking a little worse for wear. Named after a DNA molecule for its double helix staircases, the city icon twists 15 metres into the sky, offering visitors stunning views across Kings Park to Rottnest Island. The park is next to the brackish water of the Swan River, and the marine environment caused corrosion on the tower’s railings over all those decades. In February 2021, the Botanical Gardens and Parks Authority decided it was time for a major refurbishment.

Dulux Protective Coatings Consultant Nathan Hines met with Mike Sekles and Quentin Bourcier of Freyssinet Australia, David Smith of Plane E, and the team at GHD to discuss the latest technology in protective coatings. Nathan recommended a three-step coatings system beginning with a full surface blast and a priming coat of Duremax GPE ZP. Applied by airless spray, this two pack epoxy is formulated with zinc phosphate to offer active inhibitive protection against corrosion. An intermediate coat of Duremax HBE produced a high build, abrasion resistant film. Two coats of Luxathane HPX created a high gloss white finish with good UV resistance. Broadcast Aggregate was added to the platform and stairs to add essential grip, which is especially important for all the fitness fanatics who like to race to the top!

The project wasn’t without its challenges, as Nathan explains: “After a trial, we decided to pivot the specification. With the intricacy of the structure, the applicator was having difficulty staying within the thickness parameters. Switching to Duremax GPE ZP and Duremax HBE was more forgiving.”

When coating intricate structures, it's important to take a flexible approach. At Dulux Protective Coatings we offer ongoing consulting to applicators and asset owners, to guide them through any required tweaks.

“The ability of Duremax HBE to hold up at thicknesses up to 500 microns avoided the need to sand out defects such as sags and runs. This capability minimised extra work."

The DNA Tower is once again shining above the treetops, ready to safely show visitors the sights of Perth and beyond.

Speak to our coatings experts for expert guidance, advice and a custom specification. We'll partner with you to the end of the project to ensure an outstanding outcome.


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