Oil & Fuel resistance

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Oil & Fuel resistance

Author	Message
Flowboy	Flowboy posted 8 Years Ago HOT Topic Details
Group: Forum Members Posts: 1, Visits: 8	Hi folks, new to the forum & have a couple of small projects in mind. One using Carbon Fibre & the other a resin casting Re. the casting, I searched the forum for an answer without any luck... How fuel & oil resistant are the various resins?. By that I mean pump petrol & mineral engine oil. The casting would not be directly soaked in fuel or oil but could potentially be spattered with small amounts of fuel or handled by oily hands / gloves; Or perhaps the question should be; which resin would you not use in such circumstances? The casting is a steering damper knob for a vintage motorcycle so the resin will have to take some firm hand tightening force on it but not a massive amount & perhaps be resistant to the occasional light knock without cracking or shattering chunks off. There will be a brass/bronze threaded insert cast in. I'd be interested to hear any thoughts / advice on this Cheers
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Hanaldo	Hanaldo posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	For your application, any resin should be fine. If it were me, I would probably avoid polyurethane and polyester, as they have the least chemical resistance and also aren't as strong. A vinyl ester or epoxy would be my choice. Vinyl esters and epoxies have great chemical resistance, so they will handle a bit of exposure to engine oils and petrol. Ethanol is a bit harsher, but even then, if it isn't being submerged then they should be totally fine. Even a polyester resin should handle it at room temperature to be honest.
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Dravis	Dravis posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 592, Visits: 1.9K	I take it that you will have to colour the casting resin for the knob? I would use epoxy and add some sort of fibre filler to the resin. That would make the knob very strong and using Epoxy would make it resistant, "Sapere Aude"... Dare to KNOW! The written word is the only truly efficient vehicle for transmitting a complex concept from mind to mind... 103% of all people do not understand statistics... Do not adjust our mind, theres a fault in reality :-)
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