Found: Front Windshield using a Lock Strip and Gasket on a 65 Dart

Hello Members. I am installing my front windshield glass on my 65 Dart GT. The gasket I am using is from Classic manufactured by Precision. I have watched a few videos on YouTube, but none of the installers use a sealant between the gasket and the body, nor between the glass and the gasket. So the question is, do I use a sealant, or does the locking strip provide enough pressure to seal the gasket to body and the glass to gasket. I do not plan to drive the car in the winter, but, in the summer, we will drive and show. I expect we will get rained on a time or two. We live in Iowa, so the spring shows will, for sure, present some weather. Can anyone advise on a sealant or even if one is necessary. Thanks for the help. sgrip65