I have Hylomar for sealing the housing legs but now have second thoughts. What do you guys recommend for sealing the housing legs? Aaron Cake video shows some type Permatex product that is brown/gold in color, but I can't read the name.

 

Ultra copper RTV, i got mine at Napa, Same as what Aaron cake used in his video

 

Aviation form a gasket, I also use it on my flat4 engine cases
dont get on your skin, its a bugger to remove

 

Grey RTV. It was formulated to handle pooling oil so I figure it can handle oil splashing on it.

 

permatex type 2?

 

I ended up getting the Ultra Copper RTV. Thanks for the options.

 

i use the mazda sealant, 8527-77-739, although the grey/black silicons work just as well, its not a very leak prone area.

 

This is what I always use:

B)

 

^ win

 

Permatex Ultra Copper, Permatex Ultra Grey, Permatex "The Right Stuff" Grey, Aviation Sealant, HondaBond, etc. There are a number of products that work. I tend to use the Ultra Copper because it's my standard gasket goo that I use on nearly everything that doesn't spec a specific sealant.

 

I use Hylomar on the legs and I have never had a leak there.

 

I just purchased some new old stock Hylomar from K-Line and am pleased. See their eBay link below.

K-Line KL1500: Tube Grip With Hylomar Sealant: K-Line Tools: Hylo-Mar | eBay

$9.12 for 100g tube and Tube Grip

I wanted to make a new thread for this because it was such a good deal but unfortunately I can't because of my only 10 post count. So, if anyone else could make a new thread about the Hylomar sale I'm sure lots of people would appreciate it.

 

i use aviation form-a-gasket(shellac compound) still on FC legs and on FD series 6 or later engines i use permatex ultra black.

 

Karack >> Why not Ultra Black on FC legs?

As I said above, except for exhaust [Ultra Copper], I use Ultra Black for all RTV purposes.. It's supposed to be their most oil resistant RTV, I believe.

 

i actually prefer the aviation sealant on aluminum parts but the FD legs have channels milled into them designed for silicone sealant.

 

Black or grey are the two most universal RTV's from permatex, grey being better for two machined surfaces, and black a bit more oil resistant.

 

I used Hylomar, no leak so far (200 miles)

The rest of the engine I use mostly just the Prematex Black RTV, like on the front cover and oil pan. cheap and reliable. Have been using these stuff on couple of cars, no leak whatsoever.

 

hey there guys,

is there any update on the peeps who used Hylomar for the housing legs?
with regards to how its holding up against the oil. how much to use.

or

any info on what could be the new standard/better alternative in gasket sealant to be used on the housing legs

any help would be greatly appreciated

 

I used this stuff on my current engine. Gasket Sealants : Permatex® PermaShield? Fuel Resistant Gasket Dressing & Flange Sealant

I believe it is Permatex's version of Hylomar. Best I can tell it's not leaking after 2 years.

 

Hylomar tends to stay soft for a very long time, hence why its a perfect application to use on the housing water jacket gaskets. It fills in the voids that the gasket doesn't fill and stays there. When hylomar is pressed between two machined surfaces, it tends to squeeze out leaving very little hylomar left to bond. I would not use it on the housing legs.

Permatex Aviation Form a Gasket is a good choice for this application on the housing legs. I've never heard of anyone having a leak here using this product.

 

Quote:

Originally Posted by wozzoom

Hylomar tends to stay soft for a very long time, hence why its a perfect application to use on the housing water jacket gaskets. It fills in the voids that the gasket doesn't fill and stays there.

hello good sir, you're talking about the water seals right?

 

Yes. Hylomar is great for the water seals. For the legs on the housings, I'd use aviation form a gasket. that's my preference.

 

@woozzom: thank you for your advice on this. reason I even brought this up is due to the fact that everyone has different methods and products they use with regards to the housing legs; and im sure they all work well but i was hoping to know which one is bullet proof.