In 1928, production was transferred to a purpose-built factory to the designs of Percy Sharp, at 265 Merton Road, Southfields, in the London Borough of Wandsworth.
They also had a satellite factory (called Watersend Condiments) in a converted farm building beside a manor house at Temple Ewell, Dover.
The factories continued to make sauces until 1969 when the owners of the company sold it off to Reckitt and Colman at Norwich.
However, the Art Deco facade of the Southfields building, visible from Merton Road still exists and has been awarded Grade 2 listing status in August 2002.
OK Sauce's main market is today in the Far East and UK domestic Chinese communities.