ac box foam seal

[alienturtle]

Looking to seal my ac box inside and out back to the firewall. I searched through rockauto thinking they sold the pre made pieces. What are u guys using to seal these back to the firewall? Thanks

 

[f-two-fiddy]

I used 3M closed cell foam.

 

[icanfixall]

Any RV shop will sell the Duct seal on the tape. Thats whats on there now. It works and never hardens ever.

 

[RLDSL]

In jam , silicone works fine. or you can use this neat black gooy stuff
Sometimes called mastic tape, sometimes called all kinds of things. It's a real mess to work with but it seals thing up nicely and you can set a layer on one surface and it won't smear around if you slip like silicone ( but it will stick and you will have to pop it loose

Regular foam can let fumes through to the passenger compartment.

Once you get the box on, have some more fun and get some of that 1/4" closedcell foam with double sided foil insulation and wrap the whole box with the stuff to insulate it from the engine compartment. It will help your ac temps a bunch

 

[subway]

I used some leftover windshield round seal, it comes in a kit and conforms creating a water tight seal under the hood.

 

[f-two-fiddy]

I've never had a problem with any unpleasant smells, or water infiltration in the cab. The closed cell foam is not condusive to either. The windshield butyl is a good idea too. I jsut didn't have any on hand at the time.

 

[88beast]

i used silicone for one section where plastic met plastic and where the stock foam was i went to lowes and got some weatherstripping foam with the adhesive on one side. then selftappers to hold it together works great so far no issues that was over a year ago.