Most homeowners with a new hardwood deck end up at the big-box hardware store on a Saturday morning, grabbing whatever's mid-priced and looks reasonable. Six months later the deck's starting to look tired. By year two it's flaking. They blame the timber. The timber's not the problem.
Off-the-shelf deck oils are formulated for the mass market — generic timber, generic conditions, sold cheap, designed to look good for a few months and need recoating constantly. They're often coatings rather than penetrating oils, which means they sit on top of the timber, trap moisture underneath, and eventually peel.
What you want on a Perth hardwood deck — jarrah, merbau, spotted gum, blackbutt — is a penetrating oil. It soaks into the timber and becomes part of the fibre. It doesn't form a film. It doesn't flake. It just wears back gradually until you re-oil.
The two products we use on every Endure deck are Equisol Pro E365 and Cutek CD50. Both made for Australian conditions. Both penetrating, not coating. Both sold through specialty timber suppliers, not big-box stores. Equisol is the lead pick — easier to apply, faster to dry, made for hardwood under harsh UV.
The way to know if your current oil is working: pour water on the deck. If it beads off, you're fine. If it soaks in, you're due for a recoat.
A 5L tin of Equisol is around $165 — enough for 50–80m² of hardwood. Sounds expensive next to a $35 tin off the shelf, until you factor in that the cheap oil needs three coats and a redo every six months. Run the maths over five years and the cheap oil costs you twice as much.
If you'd rather hand the whole thing to someone who's done it hundreds of times, that's what Deckcare maintenance service is for. The first oil is included on every Endure deck. The follow-up at 12 months is optional, no lock-in.
What you don't want to do is undo a $40,000 deck with a $35 tin of the wrong oil.