The maker of Marmite is threatening legal action against the British National Party to stop it from using a jar of the spread in a party broadcast.
Unilever said it had not given the BNP permission to use its product and was looking into taking out an injunction.
The BNP's online broadcast was removed from the party's website, but it is still available to view on file sharing website YouTube.
BNP leader Nick Griffin told the BBC the broadcast was created as a spoof.
Unilever said in a statement: "Neither Marmite nor any other Unilever brand are aligned to any political party.
"We are currently initiating injunction proceedings against the BNP to remove the Marmite jar from the online broadcast and prevent them from using it in future."