Glamorgan and Surrey were forced to share the points as a flat wicket at the SWALEC Stadium prevailed in the LV= County Championship Divison Two.
Surrey, having set the hosts a stiff target of 352 in around 57 overs were unable to make a single breakthrough and the respective captains shook hands on a draw with Glamorgan 116 without loss.
Starting the day 144 runs ahead, Surrey, in their quest for quick runs, scored 207 for four in 37 overs before declaring after lunch.
Steven Davies was bumped up the order following his first innings double-ton, but soon lost his partner Rory Burns who was caught and bowled by Graham Wagg.
The same bowler then accounted for Davies, which brought Kumar Sangakkara and Kevin Pietersen to the crease, with the Sri Lankan great hitting a fluent 40 before departing.
Pietersen, having shared partnerships of 33 and 86 with Jason Roy and Gary Wilson respectively, remained unbeaten on 53 as Surrey called a premature end to the innings.
For Glamorgan, to score at a rate of over six runs an over was always going to be difficult, and Rudolph, having seen his team avoid the follow on with a stirring batting performance on third day was reluctant to take any chances.
Rudolph and James Kettleborough made a sedate start, and it soon became obvious that saving the game was Glamorgan’s objective.
The opening pair took no risks against Surrey’s attack of three seamers and the spin of Batty and Ansari, and at tea had only scored 57 from 23 overs.
They continued untroubled after tea with Rudolph reaching his second half century of the game, before Kettleborough added his first fifty for the club.