Windshield sealing? lock strip

I have a 70 and it had a lock strip in the seal when I removed it. Based on the condition I am pretty certain it was factory. The lock strip is places into the grove of the seal and expands it so it seals, you do NOT want to put sealer on these, just put some soap onto the lock strip and push it into the seal, the window should seal up just fine as long as it was clean under it when installed. The lock strip is pretty critical in holding the window in place so it is important to put it in. It should go all the way around the window to expand the seal for correct fit.