The venue will host two exhibitions for the festival, which runs from the 31 July to 3 August.
In return, local graffiti artists will permanently transform Forman's restrooms with their creative designs.
"We are proud to be a major sponsor of such an exciting and far-reaching arts festival," said owner Lance Forman. "To have the opportunity to showcase artists from around Hackney Wick and support the local community is a real honour for Forman's."
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