Essex found themselves frustrated by the weather and Glamorgan's third-wicket pair as they went in search of victory at Chelmsford to keep alive their hopes of winning promotion in the LV= County Championship.
Following their success in winning the toss, Essex made an start by removing both visiting openers inside three overs.
However, Murray Goodwin and Ben Wright then put together an unbroken stand of 96 that helped carry the Welsh county to 103 for two from 42 overs when play ended prematurely because of rain.
David Masters was responsible for Glamorgan's early woes.
The veteran seamer struck with the third delivery of the match when Gareth Rees shouldered arms and was bowled by a delivery that nipped back sharply.
Will Bragg then miscued to Ravi Bopara in Masters’ next over to leave Glamorgan in trouble, particularly as leading batsman Jim Allenby was being rested ahead of Saturday's Yorkshire Bank 40 final with Nottinghamshire at Lord's.
The experienced Goodwin, now in his 41st year, and 25 year-old Wright revived the innings with a determined partnership.
Although they experienced a few anxious moments in tricky conditions, the duo gradually gained the initiative, helped by bowling that left much to be desired.
Masters was the exception because, as usual, he dropped on an immaculate line and length that meant few risks could be taken against him.
The clouds gathered during the lunch interval, after which only four overs were bowled before rain sent the players scurrying to the pavilion.
Just eight overs were possible following an early tea, persistent showers putting paid to the day’s play with Goodwin on 48 and Wright 44.