What is the best brand windshield gasket

[djmachinist]

I am installing a new windshield in my 69 GMC. My installer tried to use a LMC supplied gasket and it did not fit very well at all. I ordered the pre 70 gasket and matching trim. The trim would not stay in the groove. it seemed to be dimensionly off by a smidgen. They are now trying to install a Gasket I had got from Classic a while back. They say it looks to fit a little better. We'll see if it works. They did change the back glass using the LMC gasket with no problems.

However, what is the best Gasket brand to get and what supplier.

Both gaskets from LMC and Classic were in "Goodmark" boxes.

Thanks,
Dale