Replacing T-Slot filled bulb weatherseal

A home owner from Rahway, NJ says:
I just purchased .270 T-Slot Foam Filled Bulb Weatherseal part no 58-171 from your company, order #785291. After removing the old weatherstrip, is there some trick or special tool for getting the new seal into the window's T-Slot without destroying it? Thank you.
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Tom from SWISCO responded:
There isn't really a trick that I know of. It should just slide in from the edge. If the corners are sealed, you may need to carefully cut an opening with a utility knife.
A quick learner says:
The corners were sealed, cut opening as suggested and the T-Bulb seal was able to be inserted. Thank you.
Identifying Replacement Weatherstripping
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