Automotive Grade Sealant - Water Intrusion to Electrical Penetrations and Plastic Venting

[DieselSlug]

My 05 Yukon was experiencing water intrusion about a year or two ago. Specifically in the cargo area from the vents in the D-pillars as well as the electrical penetrations for the rear lift gate. I utilized a Home Depot exterior grade clear silicone sealant which seemed to work well for a year or so. When I put on the Escalade D-pillar covers I noticed the previous caulk is now deteriorating and peeling right away leading to more water intrusion.

I need a sealant to put around the rubber boots to help seal the stiff rubber components to the painted body. Other places are from plastic vent panels to the painted body. What is truly an "automotive" quality sealant that I can get at least a few years out of? Id prefer a clear sealant, but could do black as the Yukon is painted black. I have true GM seam sealer, but to me that's more for adjoining or lapping metal body panels and is also white in color.

 

[MrMarty51]

The right stuff ?

 

[ak diesel driver]

windshield urethane glue

 

[DieselSlug]

The right stuff ?

I see permatex has all sorts of silicone type sealants and/or adhesives but none seemed to be for what I am trying to do?

windshield urethane glue

This was something I was leaning to, but wanted to stay away from anything that was really and adhesive. Is there a type of just urethane sealant caulk? Everything im finding on Google has adhesive properties to it.

One thing you just got me thinking about is RV caulking! That stuff is meant for brutal exterior applications for water proofing.

 

[dbrannon79]

I forget the name of it but they do make a sealant used on RV roofs but iirc it's only in white. you might stop by and talk to some of the RV shops and see if they can get it in black.