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Hi @BoeingFan,
It sounds to me like the Dulux Acratex roof membrane system is what you need. It's a full acrylic elastomeric polymer and, as such, will provide a waterproof coating to your roof. You'll need to repair those pin holes first and treat the rusted areas as best as possible with a rotary wire brush and rust converter.
The product is not marketed to D.I.Y.'ers as painting a roof is not typically a project many would attempt themselves.
Regarding the heat reflective properties, the Dulux Acratex Cool Roof provides maximum Solar Reflectance for optimum cooling benefit.
It might be a good idea to jump onto the Dulux website and have a chat with their consultants. They'll be able to walk you through the project. There is a possibility that you could use the membrane and then over coat with the Cool Roof, but the Dulux technical team would like to discuss that with you directly.
Mitchell
Hi @BoeingFan,
I am unaware of a stocked roof paint that provides membrane and heat-reflective properties. In fact, your only real option would be to use Dulux Weathershield, but after speaking with the Dulux technical team, they advise a roof painting system like Acratex instead of a general exterior paint like Weathershield.
Mitchell
