OT - Silicon Gasket Recomendations
Turbo Mini Forums

I am putting a modern engine back together and many of the faces are sealed with a silicon bead not a gasket. Can anybody recomend a decent product to use and where you got it from (although I am guessing that most descent A1 or Halfords will stock such stuff)

Cheers

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

Wurth RTV is what I use, on the expensive side but from using shite such as Granville silicon the Wurth is well worth the premium in price (see what I did there!)

I buy mine from my factor who keep it, or I think there are ebay sellers with it.

Wellseal will also do a good job if you have some of that.

Edited by Tom Fenton on 16th Nov, 2010.

as tom says ...... i also usw Wynns RTV balck silicone............ never had a problem

Edited by BENROSS on 16th Nov, 2010.

Ok, cheers for that I will see if I can get some locally.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

Any decent moto factors should have the wynns stuff.

If something is worth doing, it's worth doing half of.

Loctite

Hlafords sell it in a couple of tube sizes.

There is three grades, I cannot remember the numbers, but its colour coded. Black is a low modulous RTV intended for constant exposure to oil and coolant. Grey is a high modulous RTV intended for constant exposure to coolant and infrequent exposure to oil. Copper is a low modulous high temperature RTV for use in areas exposed to 200 degrees.

Loctite brand is a brand you can trust that it does what it says it does. While Wellseal is good, its damn messy and not so good at large gap filling, that the BMW16v guys have to deal with on the head covers.

Is no one happy with Blue Hylomar ?.

Schrödinger's cat - so which one am I ???

Blue Hylomar = Gorilla Snot!

If something is worth doing, it's worth doing half of.

Ultra black RTV sealant all the way!

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1/4mile in 13.2sec @ 111 terminal on 15psi

I've not had much success with Hylomar either,

I've used Loctite 574 a lot (as its always hanging around at work) and its pretty good,

used welseal and it was good, got it everywhere though and couldnt get it off my hands lol

not used silicon stuff really so can t comment.

RTV describes a type of compound, silicone rubber is a compound. I'm not sure what Loctite RTV compound is classified as, but it has no silicone in it and is safe for lambda sensors.

RTV - Room Vulcanising Rubber. Two types. The stuff that smells like vinegar and the 'odorless' that although has an odor, it is fairly neutral. Both use the moisture available in the air as a catalyst to cure.

Anyone using the term 'silicone' meaning a 'sealer', is reffering to RTV compounds, particularly silicone rubber, but the term silicon in itself has become synonymous with sealants much like Hoover is with vacuum cleaners. RTV would be the better terminology where this type of sealant is concerened

Ok, not used RTV either

also, not sure what that 574 stuff is but its not like other sealers that I've seen, it sets more like a glue.

The loctite stuff is indeed a silicone rubber compound.

Black 5910 soft/ flexible
Grey 5699 not so soft/ flexible
Copper 5920 High temp

datasheet

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Wurth RTV is probaly one of the best on the market!

when it comes to thread sealing at work, we use nothing but Loctite 577. Sets as soon as the joint is tightened up, no need to wait for it to go off before putting the joint under pressure, and this is the important bit, it is easy to break the sel on disassembly. Some of our workers use a stuff called Permabond. That stuf does what it says, its a permenant bond!! beware on copper and brass fittings!! you will have to break the joint with high heat. Pain in the Arse.