After Aiden Markram’s 82 off 107 balls on Thursday, captain Temba Bavuma (51 off 145), David Bedingham (74 off 107), Ryan Rickelton (80 off 121) and Kyle Verreynne (65 off 103) spent valuable time in the middle on Friday.
All five batsman retired out, with only Tony de Zorzi (nine) and Tristan Stubbs (eight) missing out.
The Proteas were 408-9 at stumps, leading by 11 runs.
The first Test between the West Indies and Proteas will take place at the Queen’s Park Oval in Trinidad and Tobago from 7-11 August and the second at the Guyana National Stadium from 15-19 August.
