From A1 towards Bern:
Neuenhof exit, take the Hauptstrasse towards Spreitenbach. In Killwangen turn left towards the railway station at the first set of traffic lights, continue uphill past the station then bear left before the underpass and turn left again immediately into the industrial area.
From A1 towards Zürich:
Dietikon exit, take the Hauptstrasse towards Neuenhof. In Killwangen, turn right after "IKEA", opposite the Shell filling station, turn a 270 degree circle and after a few metres turn right into the industrial area.
Zürich airport is around 25 km from the industrial area and easily accessible by taxi.