Bath coach Toby Booth says the arrival of winger Horacio Agulla will bring "positive pressure" to the squad.
Agulla, 27, agreed a move in the summer but has yet to make his debut because of his international commitments with Argentina in the Rugby Championship.
The former Leicester man arrives in Bath next week and will add depth to the back line which already boasts in-form wings Tom Biggs and Kyle Eastmond.
"It will provide us with a much-needed boost," Booth told BBC Radio Bristol.
"We need to bolster our squad size and numbers as we're a little bit thin.