The concrete was laid in October, and I'm just sealing it now - sodium silicate-based sealant from the local BM.
The garage is going to be used for reasonably heavy-duty car maintenance, so likely to get spilled on, and is definitely going to have axle stands etc used on it. I don't want something that's going to peel in days - but I don't need to worry about short curing times so I can get the car back in.
Ideally, a decent range of colours available, too... I don't want just concrete grey, but I do want something fairly light.
I'm leaning towards Ronseal's Diamond Hard - http://www.ronseal.co.uk/ products/diamond-hard-garage-floor-paint - anybody tried it?