towel bar too short

A quick learner says:
RE: Door Handle With Towel Bar Insert, 2-1/4"
Product Code: 10-133

got a set....they fit the shower door holes, the towel bar slides in fine....but now the bar seems a tad short....

any suggestions what I could stuff in the door handle openings to reduce the sliding back and forth...it would have to be something that would obviously survive getting wet..

Know this may be a long shot but thought I'd ask in case other folks had the same problem in past..
any help appreciated...

thanks
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting. I think you might want to try a silicone caulk. That's what I'd use.
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.