Each team hit the post in the second period, with Bo Horvat doing so for the Islanders at 3:37 and again at 3:48. Brayden Schenn did it for the Blues at 11:59.
"I thought we competed well," Islanders coach Patrick Roy said. "We had our chances, especially in the third period. A couple ones, I just couldn't believe they didn't (go) in. We didn't try to force the game. ... Overall, I thought we played very well defensively. And when we did not, Ilya made those key saves for us. Offensively, we had our chances."
Blues coach Drew Bannister commended his team for showing patience.
"I'm proud of our group. I thought we showed a lot of maturity," Bannister said. "That's a game where you can get frustrated in, and our guys just stuck with it. They played the way the game came to them. They didn't deviate from what we had to do to have success. As much as it was a great road game for the Islanders, I thought we stayed focused, we stayed on task and they got rewarded at the end."
NOTES: Broberg set a Blues record for a defenseman by getting a point in each of his first five games with the team (one goal, four assists). ... The Islanders were 0-for-2 on the power play. The Blues were 0-for-1.