Sealant for exhaust studs

[daytona71]

I am about to put new studs on my 400 block. In order to prevent coolant leaks, whats the best sealant to put on the threads?

 

[747mopar]

I used the Red RTV and no leaky.

 

[lewtot184]

i use arp teflon thread sealant.

 

[MoparMitch]

i use arp teflon thread sealant.

This ^^^^

 

[Cranky]

I've had good results with both of those products.

 

[MarPar]

teflon thread sealant works great. 3 years and no leaks

 

[69Bee]

This ^^^^

This ^^^^ X2

 

[SlinktRR]

permatex aviation form-a-gasket. there are several products that will work, but the permatex is effective on studs.

 

[Xp29h]

Teflon thread sealant has work best for me.

 

[mopar12372]

permatex high heat copper im sure theres more