Windshield gasket "filler strip" for 68 Dart HT

[Baines]

The factory service manual calls for a "filler strip to be installed in the lower part of the weatherstrip". Does anyone know what this is and is it required on the windshield gasket I purchased from Detroit Muscle Tech?
Reason I am asking is that since putting the windshield in using said gasket/weatherstrip, I have major water leaks coming in both sides from under the dash on my 68 Dart. I plan to remove the glass this winter and check out the drains as described by "Old Man Mopar" I am confused on what to do about using any or which kind of sealer, it seems there are quite a few opinions out there in the FABO community.

 

[Kendog 170]

I may be wrong, but I thought the Hardtop just has a locking strip as part of the gasket and the convertible has the filler strip. I'd have to look at mine when I get home. Any pics of the gasket you have? Found a read for you.BUT is for 1967. 68 is different.
Front windshield install with gasket and locking strip

 

[Murray]

Have you confirmed that the water leak is coming from the windshield and not the cowl?

 

[HemiSSDart]

Locking strip is just for the convertible...

 

[Professor Fate]

Have you confirmed that the water leak is coming from the windshield and not the cowl?

Or the wiper pivot seals?

 

[66Dartdriver]

I installed a new windshield gasket from them this summer with no rtv or anything and no leaks after about 700 miles. Lets start at the beginning. Did you verify it was the correct gasket? My gasket had pen masking on the actual gasket so you could double check with Detroit as to that.Did you see in the instructions to tuck/fold the outer gasket into the inner to "seal" it up? Did it leak before with the old gasket? can you see exactly where it is leaking? Was the windshield frame intact and solid?