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Message started by Tiefighterpilot on 05/01/10 at 10:39:12

Title: RTV question
Post by Tiefighterpilot on 05/01/10 at 10:39:12

For sealing muffler to header pipe, is
RTV used? if so, what temperature will it reach?

I was thinking getting this from Harbor Freight. Will this work?

3 Oz. RTV Silicone - Red
ITEM # 90026

Specially fomulated for high temperature applications from 70° to 600° F continuous or 650° F maximum

Safe for all car models
Won't foul computer sensors
Resists high pressures to 5000 PSI
For use on oil pans, rear end housings, water pumps, valve covers, thermostat housings, electrical connections and wires
Remains flexible when dry
Resists shrinking and cracking

Title: Re: RTV question
Post by dasch on 05/01/10 at 11:34:35

It will work. Don't call me if it starts to smell bad and smoke ;)

I used regular plumbing sylicone a few times on bikes for same purpose. Smells bad for few minutes, and still holds.

Title: Re: RTV question
Post by JESPOKER4FUN on 05/03/10 at 21:27:59

You can also use Permatex muffler and tailpipe sealer.
Resists temperatures to 2000F
$3.95 at the auto parts store.

Title: Re: RTV question
Post by Tiefighterpilot on 05/04/10 at 07:45:53

Thanks!

Title: Re: RTV question
Post by Routy on 05/04/10 at 08:27:20

Resists high pressures to 5000 PSI
--------------------------------------------
How very misleading !
This stuff is not going to hold any pressure unless it is captured in a very tight place,....such as where it is taking the place of a very thin gasket,....or added to gaskets, which is what it is designed for.
In reality, it will probably not hold any hi pressure anytime anywhere.

Title: Re: RTV question
Post by dasch on 05/04/10 at 08:29:17

:) good catch...

Title: Re: RTV question
Post by Phelonius on 05/04/10 at 09:33:57

RTV s'not to be used in that high of temp areas.

Phelonius

Title: Re: RTV question
Post by dasch on 05/04/10 at 09:57:39

Awww, it just smells bad for few minutes, been there, done that. A friend of mine tried to burn regular plumbing sylicone with a brazing propane torch - nothing! Turns red, and cools to normal state.
However, there's special dedicated stuff for exhaust fixes, I just don't have it available here.

Title: Re: RTV question
Post by buttgoat1 on 05/04/10 at 10:18:24

I used some fiberglass resin to fill the oversized joint in an exhaust pipe. I used some duct tape to seal the lower parts of the joint and let it flo into the joint. smelled bad at first but held

its amazing how creative we cabn be in a pinch.

Title: Re: RTV question
Post by Digger on 06/13/10 at 20:13:35

1C212D2E212F203C2D3A382124273C480 wrote:

Tie,

I wouldn't use RTV there, if it were me. However, if I was somehow compelled to use it, I'd use Permatex® Ultra Copper® Maximum Temperature RTV Silicone Gasket Maker (http://www.permatex.com/products/Automotive/automotive_gasketing/gasket_makers/auto_Permatex_Ultra_Copper_Maximum_Temperature_RTV_Silicone_Gasket_Maker.htm).

Title: Re: RTV question
Post by Tiefighterpilot on 06/15/10 at 20:17:00

Thanks. I found a 2000 degree sealer from permatex. Seem to work.