London Irish have signed former South Africa prop CJ Van der Linde until May.
a 2007 Rugby World Cup-winner,
has been a free agent since leaving the Johannesburg-based Lions when his deal with the Super 15 outfit expired at the end of the 2013 season.
He arrives after Irish tighthead Halani Aulika ruptured his Achilles tendon in
September's defeat by Exeter.
"CJ replaces Halani. He's a world class scrummager and brings much experience and composure," said boss Brian Smith.
"He has won 75 caps for South Africa and I know our other front-row forwards Glenn Delaney and Phil Keith-Roach are excited to work with him."