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Non-setting sealant

General Tech Talk

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Non-setting sealant

Post by TheOtherLeft »

Hiya fellas,

I'm after some advice on finding some non-setting sealant.

I need to seal a small access panel on my firewall and need some sort of sealant for it.

I have used Sikaflex & Silastic before but it goes hard when cured so is not raelly of much use. I have thought of silicon grease but it will go runny in the engine bay.

I was also thinking of liquid gasket maker (ultra blue) but I think it goes hard when cured as well.

Do you guys know of anything suitable?

Thanks
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Re: Non-setting sealant

Post by tehekho »

Last I was in autobarn there were 'non hardening' sealants.

May be what you want.
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Re: Non-setting sealant

Post by NCpaj »

We use 'D-mastic' which is a non setting sealant that 'skins' when we do some roofing and body work on busses/coaches.

http://www.selleys.com.au/car-care/sealants/d-mastic" onclick="window.open(this.href);return false;

not sure how it would go with the heat in an engine bay though.

you tried sending a sikaflex rep an email???
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Re: Non-setting sealant

Post by 98lux »

What is that black or grey stuff they use to hold the plastic behind the door cards on?? that might work!!
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Re: Non-setting sealant

Post by Willy Hilux »

You can get mastic that forms a skin but still soft underneath.
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Re: Non-setting sealant

Post by TheOtherLeft »

NCpaj wrote:We use 'D-mastic' which is a non setting sealant that 'skins' when we do some roofing and body work on busses/coaches.

http://www.selleys.com.au/car-care/sealants/d-mastic" onclick="window.open(this.href);return false;

not sure how it would go with the heat in an engine bay though.

you tried sending a sikaflex rep an email???
Just phoned Selleys. The D-Mastic has an operating temp of 10-70 deg C so I don't think it's really suitable for engine bays... or maybe it is but it may get soft.
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Re: Non-setting sealant

Post by rowenb »

I've used the selleys mastic on the fire wall/footwell where i repaired some rust. I stitched in some zinc seal sheet that over lapped a lil, couple of coats of paint then mastic inside and out to help seal then more over the top. 4 years on its still good.
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Re: Non-setting sealant

Post by 91Mav »

There's some permatex gray sealant that Supercheap sell that skins up but doesn't set. It's fuel resistant but not sure about heat.
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