More than 100 Grenfell survivors and relatives are taking legal action in the US against three firms they blame for the fire, the BBC has been told.
The lawsuit will target the cladding maker Arconic, insulation maker Celotex and fridge supplier Whirlpool.
A successful action in the US could cost the firms involved tens of millions of dollars in damages.
Whirlpool and Arconic said they would not comment on the case while official investigations into the fire continued.
Celotex told the BBC's Victoria Derbyshire programme it was "considering its position" in relation to the legal action.
The Grenfell fire in June 2017 claimed the lives of 72 people and another 70 were injured.