Two piece seal for 66 valiant rear glass

Layson's (877) 930 4088 It's roll stock I'm not sure how it works has a inner and outer seal and needs to be spliced at the joint. I was hopping to find someone that may have used it for some idea how to install the rear glass. Let me know if you find anything on this or if you think it will work. Thanks Roger B
Do you have a LINK?