A school lab bench takes spilled acid, dropped glassware and the occasional Bunsen flame, often on the same afternoon. What lets a bench absorb all that for a decade is not one miracle material but five layers working together, and skimping on any one of them shortens the life of the whole.
It starts with a 2mm powder-coated steel frame for rigidity, then a moisture-resistant ply core so the top does not swell where water inevitably gets in. Above that sits the working surface — a phenolic resin or epoxy top is what actually resists the chemistry; laminate alone will stain and lift.
The last two layers are the ones people forget: a dished, sealed edge so spills run back onto the top instead of into the core, and chemical-resistant sealant at every joint. Get all five right and the bench is still flat and sealed when the students who used it have graduated.