Most of you if not all hate the very idea a wet spot on your floor pan. You think oh no take everything apart cut metal away, and a lot of time or money doing the cowl apart and back together operation. However you can avoid doing all that. I relized this by doing what I am about to tell you my self. 99% of the cowl leaks come from the collect area where the water hung out. One on the driver side one on the passenger side. The rust space is usually a one inch space open that rusted through. If you can crawl on your floor board and look up under the dash after removing and clearing out heater box and vent tubes and such you can do what I did and its great. Step 1. Clear underdash plastics- such as all the a/c heater stuff.(So you can see and access openings. Step 2. After doing step one you should be able to see the cowl openings to fix, Take a wire brush and brush the rust to a smooth rust. Step 3. Use a rust converting agent such as rustaid rust converter, eastwood product, or rust bullet. Step 4. After the rust converter has properly cured paint that cowl area with primer then your choice of enamel spray paint. Step 5. Now you have a cleaned up rust converted protected piece that has a rust gap going around the opening what to do about that because that is the ultimate problem. Use industrial strength mutlipurpose cocking stuff used for like concrete bricks stuff of that nature if you arnt savy on this ask you home depot or lowes professional they will show you. Cock above rust opening below opening and cover opening this stuff is as strong as a seal can get. If you use the heavy duty industrial multipurose cocking this stuff drys into such a hard rubber that water would never enter that hole again. And thats it very very affordable and probally never even thought to do!!!
lol... I agree. There is very few if any professionals at Lowes or Home Depot. However, some do know their stuff. As for the "Caulk" this could work... but I dont know what Chaulking is, and I wouldn't use cock on my car.
If you want a really easy fix just cut out the slats in the cowl vent and weld in a flat peice of sheet metal in their place. You could still get fresh air from the openings that go behind the fenders and no rain would get in. You would have to find a new place for your washer nozzles though.
Caulking is for boats and houses. If you went to a good automotive wholesaler, they would sell you something called Seam Sealer.
Cole 639 if you covered your cowl vents you would still get water in your cowl from rain running down you windshield at the base where your windshield meets the cowl all the way across.
I used Rust Bullet and Por15 Epoxy Putty. The acid in household caulk will do more damage than good over time.
