Looking for rubber gasket for double paned window

Thanks for contacting us! The rubber spline you're looking for might be our 59-234. This is designed for 5/8" thick glass and its height is 1/2". Please compare it to your sample and let me know what you think. 

For the Viking sliding window roller, are you able to remove the wheel assembly and send over a photo of it? Can you also tell me its dimensions as compared to the 87-180? You say that the 87-180 is close, but I can't see what you have in your photos. That would be a huge help, thank you!

Thanks for your reply. Unfortunately, we can be positive that the 87-180 rollers will ft in your sash. It is in fact for a Merzon window company that we know is popular in the California area. The concave brass wheels are used for heavy sashes. I am afraid I really can\'t see if your wheels are flat or concave shaped.

As for the glass spline, no adhesive is necessary. When installing the spline on the glass, we start at the top. in the middle, and start wrapping the glass. We also place slits for the corners and bring it up to meet the other end in the middle. Get back to us and let us know if this information helped you. 

I'm very sorry for the confusion; the 59-234 is designed for 1/2" thick glass but a 5/8" opening. That was an incorrect usage of terminology on my part. Sorry again!