Both players were injured in the Dragons' opening 38-30 win over Wigan.
Bruno Verges, Sebastien Martins, Thomas Bosc, Julien Touxagas and Remi Casty have all been added to the Catalans' 20-man squad after sitting out the Wigan match.
Former Leeds half-back Andrew Dunemann is expected to make his debut for Salford, who have also recalled forwards Chris Charles and Sean Rutgerson to their squad.
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