need ideas on how to seal roof after cutting a hole

[BRUISER]

well I cut holes in my XJ roof for my exo to connect to internal bracing and need some ideas on how to seal it off.

any ideas or where to get stuff to use would be appreciated

pic

 

[BrianGreen]

Just weld it. Or use 100% silicone caulk. It will flex with the movement.

 

[JoshRountree]

What about a vent pipe boot used for plumbing pipes that go through the roof of your house?

 

[cgm147]

what you no want leaky leaky id try to find like said above pipe boot and use some caulk

 

[RatLabGuy]

You know what, ken.

This past week I've been sealing up all the joints in my house HVAC ductwork to improve its efficiency.
I've been using HVAC caulk, it's a kind of mastic that's made specifically for a lot of flex and expansion/contraction from the metal it's on. It's extremely pliable after it's dry (some say it never really cures) and is designed for a wide temperature range... you could just goop it all around there, it goes on with the consistency of bull snot but hardenes to be more like silly putty - that'd be perfect here, way better than typical silicone adhesive caulk.

 

[BRUISER]

where do you get it? any web links?

 

[altoids]

Manus bond 75-AM or SIKA flex 221

 

[rockcity]

BASF NP1

or even Dow Corning 795, maybe 793...

 

[farmboy]

Dow

Agreed with the above... I have experience with dow795 from work. Its a structural goading caulking... Little hardware in Charlotte carries it.

 

[Black Bear]

Use some W.V. Chrome

 

[bowtieman55]

5200. <---that's the deal right there.

http://www.3m.com/product/information/Marine-Fast-Cure-5200-Adhesive-Sealant.html

and me personally, I've used chrome tape on top of it.