Installing the 55-006-6

A quick learner from Plymouth, MI USA says:
How flexible is this material? What I took out is very brittle.

Also which side goes in first? Window side or frame side?
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Paul from SWISCO responded:
Thanks for posting in our discussion board. The 55-006-6 Capitol Snap-In is fairly stiff. As for installation, we slide the one side behind the glass, and then snap the other end behind the frame.

Please refer to the following video on how to replace snap-in glazing.

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