Wales finished their summer tour unbeaten after another resounding win over Argentina in Santa Fe.
Warren Gatland’s side eased to a 2-0 series win following victory over South Africa in Washington DC.
Wales dominated throughout the match, fly-half Rhys Patchell notching up 20 points in a composed performance.
The only negative was a late red card for number eight Ross Moriarty, sent off for a prolonged headlock on Pumas outside-half Nicolas Sanchez.
Patchell’s boot was aided by two Welsh tries with a superb solo effort from wing Josh Adams – his first for Wales – and a well-worked score for Hallam Amos.
The hosts were penalised throughout and showed a distinct lack of discipline with Pumas head coach Daniel Hourcade announcing afterwards he will step down after next week’s game with Scotland.