Wet Carpet

Rained the last few days and again I have a wet carpet. I was watching where it wight be leaking and I’ve come to the conclusion it’s the corners of the window gasket. It’s a 66 Valiant Signant. I replaced the gasket last spring thinking that would cure the problem. I guess it didnt. Wondering if the glass shop can shoot some sealant up under the gasket?
To remedy this I put black RTV in the gasket slot. Quite a bit. That goes over the pinch weld. Then I place gasket on the car, holding it in place with blue masking tape. Then push it all the way on the pinch weld. let it sit for a while, hour or so, then install glass and lock strip. Works for me....