My New Toy 1968 Barracuda Fastback Formula S

I'm very happy for you guys who don't use sealer, you saved $12.00. This same sealant was used on my 66 Barracuda and 14 years later still no leaks and I don't expect the new owner of the car to ever have any leaks either. It's a small fee for insurance and a good time to install it when you are putting the glass back in, I will always use it when my glass goes back in. I wonder why there is sealant in the gaskets and on the edge of the glass when you remove them from the car?