RUMCars Forum

General Category => Unusual Microcar Discussion => Topic started by: marcus on September 20, 2012, 05:33:27 pm

Title: Gasket material
Post by: marcus on September 20, 2012, 05:33:27 pm

A motorcycle mechanic in my yard was asking me about this today and I wonder if anyone here can help.

He needs a solid material (not copper) for a thermal barrier. Many yers ago he used to get Heat Resistant Gasket Paper from a company in Bermondsey Street, S.E. London, called something like Becktill, but they have long since moved out.

Anyone here know anything of this company or any other which might sell this sort of thing? Cheers for any help.

Title: Re: Gasket material
Post by: Rusty Chrome (Malcolm Parker) on September 21, 2012, 12:02:32 am

Frosts do this stuff for "moderate heat"

http://www.frost.co.uk/automotive-gaskets-sealers-tools/graphited-sls.html (http://www.frost.co.uk/automotive-gaskets-sealers-tools/graphited-sls.html)

http://www.par-group.co.uk/sealing-jointing/KLINGER-Graphite-SLS.aspx (http://www.par-group.co.uk/sealing-jointing/KLINGER-Graphite-SLS.aspx)

PAR also make other high temperature products which might be worth talking to them about.

Title: Re: Gasket material
Post by: marcus on September 21, 2012, 08:00:54 am

Many thanks, I will pass those links to him as soon as he gets in, much appreciated!

Title: Re: Gasket material
Post by: Big Al on September 21, 2012, 08:12:22 am

Aluminium alloy is still good but I do not know who sells in sheet form. Works best on a textured machine faced pair, as does straight copper. Do not know what sort of compression ratio this technology starts to fail but it will be OK on a bubblecar. Get wild on compression and really you need a gasket that bonds, but was then awkward to get off. Here modern technology offers better sealing compounds that do come off now. Alternatively a machined obstical to prevent gas creeping out in conjunction with a gasket unless that machining is of a high quality is an option. Composite gaskets often offer crushable elements as a cheaper solution to that.

The temptation is therefore to not use the old thick gasket but just the modern compound. Fine if there is clearance/adjustability to take up the lower head. Clearly there is an option of using the basic technology of a metal gasket, now as a spacer, and modern sealing technology. That spacer can be re usable.

Title: Re: Gasket material
Post by: marcus on September 21, 2012, 08:34:38 am

I'm not sure what he needs his for, not a micro/bubble, possibly an old motor cycle or scooter.

Title: Re: Gasket material
Post by: marcus on September 21, 2012, 01:19:44 pm

Cheers again Rusty, I passed it on to him and he thinks the graphite from Par will do the job, he's very grateful for your help.