Freizeitpilot Posted June 24 Posted June 24 Is it common practice to smear a bit of Vaseline onto rubber engine mounts to stop them drying out and cracking ?
Thruster88 Posted June 24 Posted June 24 I work at a maintenance organisation. Have never seen it done. Engine oil can damage the rubber in engine mounts. 2
Area-51 Posted June 24 Posted June 24 (edited) It depends upon the material's chemical specification of the mount. Rubber, Nylon, Neoprene, Polyurethane, EPDM... They all respond differently to different types of lubricants; Mineral Oil Derivative, Synthetic Oil Derivative, Silicone Based Grease, Rubber Grease, Vegetable Plant Oil Derivative, Carbon Graphite Powder, Chalk Rock Powder. Best to always consult a Materials Specification chart to see what substances and exposure times have a Severe Moderate or Minor affect. For fitting flexible rubber type components baby powder makes life easy; and everything will smell like fresh nappies! Boot polish works wonders on nylon plastic rubber derivatives; stops them drying out and cracking Edited June 24 by Area-51 1
BrendAn Posted June 24 Posted June 24 57 minutes ago, jackc said: A LAME OK’ed these engine mounts on my 912 powered Aeropup. i don't know about them. if they were mine i would replace them. pretty ugly.
jackc Posted June 24 Posted June 24 2 minutes ago, BrendAn said: i don't know about them. if they were mine i would replace them. pretty ugly. Replaced them all, nuts as well. I did it all as part of the 5 year rubber replacement among other things the LAME did not do……
BrendAn Posted June 24 Posted June 24 Just now, jackc said: Replaced them all, nuts as well. I did it all as part of the 5 year rubber replacement among other things the LAME did not do…… well done jack. glad you changed the nuts too, they were not to flash either.
skippydiesel Posted June 24 Posted June 24 (edited) I have had a lot of success with Molykote 111 where a "rubber" lubricant is required. One tube will last me up to 2 years, so despite its initial cost, it works to be quite economical. In general products containing hydrocarbons (engine oil/fuel/ many polishes/ etc) should not on "rubber" Edited June 24 by skippydiesel
onetrack Posted June 24 Posted June 24 The only thing to use on rubber items for a lubricant is tyre mounting paste. All other petroleum-based products will eventually have a detrimental effect on rubber-containing products - even silicone sprays. 1
Area-51 Posted June 24 Posted June 24 1 hour ago, onetrack said: The only thing to use on rubber items for a lubricant is tyre mounting paste. All other petroleum-based products will eventually have a detrimental effect on rubber-containing products - even silicone sprays. Tyre mounting paste... fancy name for soap 2 1
onetrack Posted June 24 Posted June 24 (edited) Not quite. Personal care soaps contain numerous additional ingredients that are not necessarily beneficial for tyre mounting. Proper tyre mounting paste contains rust inhibitor, and dries somewhat tacky to prevent tyre bead slippage on the rim. In fact, there are plenty of undesirable additives in some personal care soaps that are not even good for your skin, or your health. Do You Know What Goes Into Your Soap? | Here’s Our Top Ingredients to Avoid - Australian Botanical Soap AUSTRALIANBOTANICALSOAP.COM.AU Your health and peace of mind are worth the extra attention when selecting the right soap for your daily routine. Edited June 24 by onetrack addendum... 2 1
skippydiesel Posted June 24 Posted June 24 10 hours ago, onetrack said: Not quite. Personal care soaps contain numerous additional ingredients that are not necessarily beneficial for tyre mounting. Proper tyre mounting paste contains rust inhibitor, and dries somewhat tacky to prevent tyre bead slippage on the rim. In fact, there are plenty of undesirable additives in some personal care soaps that are not even good for your skin, or your health. Do You Know What Goes Into Your Soap? | Here’s Our Top Ingredients to Avoid - Australian Botanical Soap AUSTRALIANBOTANICALSOAP.COM.AU Your health and peace of mind are worth the extra attention when selecting the right soap for your daily routine. I have a feeling that the definition of a soap is not limited to the type used for personal hygiene "Soaps are potassium or sodium salts of a carboxylic acid having a long aliphatic chain attached to it" 1
spacesailor Posted June 25 Posted June 25 There is one overlooked " grease " , by the name of Lanolin. It is the oil from sheep's ( wool ) hair . I have used it on rubber & it hasn't damaged it , after five years . It still has a little Shine left . Not ' animal ' fat , as it is only in the fleece. spacesailor 2
skippydiesel Posted June 25 Posted June 25 12 hours ago, onetrack said: The only thing to use on rubber items for a lubricant is tyre mounting paste. All other petroleum-based products will eventually have a detrimental effect on rubber-containing products - even silicone sprays. Silicone comes in may forms - some may have hydrocarbons present. Silicone spray. The WD40 Silicon is almost rubbish - I use it for jobs where I don't feel high lubricity or persistence is required. CRC Automotive Silicone on the other hand is in a galaxy of its own, compared with the likes of WF40. I suspect that many "sprays" have a hydrocarbon thinner in them. Molykote 111 is a silicone grease that is approved for use in food preparation/manufacturing - I doubt any hydrocarbons present.
skippydiesel Posted June 25 Posted June 25 24 minutes ago, spacesailor said: There is one overlooked " grease " , by the name of Lanolin. It is the oil from sheep's ( wool ) hair . I have used it on rubber & it hasn't damaged it , after five years . It still has a little Shine left . Not ' animal ' fat , as it is only in the fleece. spacesailor Yeah! I have only occasionally used it (Lanox) but like the idea that its of organic origin and is therefore likly to have very low toxicity (if any) is appealing. I would steer away from the pressurised spray cans and go with the liquid applicators (less likly to be thinned with hydrocarbon) 1
turboplanner Posted June 25 Posted June 25 Talk to your local school bus operators and see what they do on the rubber floors of their buses. 75% will do nothing but 25% will have smooth, shiny floors and clean and use a floor wax regularly.
spacesailor Posted June 25 Posted June 25 Lanolin! , stay with a thick grease, a smear lasts forever. And it's cheaper by far . spacesailor
Freizeitpilot Posted June 30 Author Posted June 30 The summary…… Siloxane containing products appear to be the most common go to material for vulcanised rubber protection. Lanolin based products should also be ok, although lanolin has a relatively low melting point, so it may need to be re-applied if temps under the cowl are consistently hot. Don’t use Vaseline.
facthunter Posted June 30 Posted June 30 Most of those bushes don't need lubricant. The "GIVE" is in the rubber. Clean rubber with glycerine. Petroleum makes it expand and weaken. If you get oil on a tyre clean it as quickly as possible.. There's a rubber grease available for use in auto hydraulic systems. Nev
danny_galaga Posted July 1 Posted July 1 On 25/06/2024 at 11:14 AM, skippydiesel said: Yeah! I have only occasionally used it (Lanox) but like the idea that its of organic origin and is therefore likly to have very low toxicity (if any) is appealing. I would steer away from the pressurised spray cans and go with the liquid applicators (less likly to be thinned with hydrocarbon) I hate to be pedantic but regular motor oil, and petrol has an organic origin. But I know what you mean by organic in this sense- non-hydrocarbon.
facthunter Posted July 1 Posted July 1 What are you lubricating rubber for? It's not used in large angular displacement situations . Nev
danny_galaga Posted July 1 Posted July 1 4 minutes ago, facthunter said: What are you lubricating rubber for? It's not used in large angular displacement situations . Nev I think I general people do it when it's hard to press it in to something. I had to use a bit of soapy water to get my engine mounts in. It was insanely difficult 1
skippydiesel Posted July 1 Posted July 1 9 minutes ago, danny_galaga said: I think I general people do it when it's hard to press it in to something. I had to use a bit of soapy water to get my engine mounts in. It was insanely difficult "Easy- peasy" with a smear of Molykote 111 is a silicone grease 1
danny_galaga Posted July 1 Posted July 1 1 hour ago, skippydiesel said: "Easy- peasy" with a smear of Molykote 111 is a silicone grease Too late now 😄 If I ever even get this stupid thing flying, I won't be keeping it long enough to ever have to worry about the mounts 😄 2 1
skippydiesel Posted July 1 Posted July 1 1 hour ago, danny_galaga said: Too late now 😄 If I ever even get this stupid thing flying, I won't be keeping it long enough to ever have to worry about the mounts 😄 Now now! Get her flying and the shear joy, wonder & privilege of flight, will grab you and all of the past struggle will be a distant memory😈 4 1
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