Frank 157 Posted April 11, 2023 Share Posted April 11, 2023 Seeking answers from the brains trust here ! does anyone know of a sealant that is resistant to diesel ? Burnsco checked with Sikaflex and they advised that none of their products were suitable. I think some Silicone based products may be OK but I would like something with more adhesion, typically a moisture curing polyethylene type product , I will check with Bostik as well. Chrs Quote Link to post Share on other sites
ballystick 72 Posted April 11, 2023 Share Posted April 11, 2023 I used automotive RTV Engine sealant to seal my fuel tank access hatch and it seems to be OK so far after 4 years, it says it is diesel and oil resistant https://www.repco.co.nz/car-care-panel/adhesives-sealants/gasket-cements/threebond-high-temperature-rtv-silicone-liquid-gasket-no-1-85g-grey-ss1-85/p/A1130575?rgfeed=true&cid=google-shopping&utm_source=google&utm_medium=cpc&gclid=CjwKCAjwitShBhA6EiwAq3RqA-rMO8FQDhHBUoRcotp0kaE4q8VxrHkNgWY-bBrlchrKsPq3d0Uu_hoCnwwQAvD_BwE Quote Link to post Share on other sites
Frank 157 Posted April 12, 2023 Author Share Posted April 12, 2023 Thanks, and I get the impression the Silicone sealants are inherently resistant to hydrocarbons but for sure its not the case with polyurethanes (but maybe some will be) I happen to have some dowsill 795 structural glazing adhesive which is used to glue panes of glass to skyscrapers, on that basis I am sure it has high adhesive strength. so I might look into that as an option. According to mr Google It seems diesel is quite a complex brew of chemicals " Diesel fuels are complex mixtures of alkanes, cycloalkanes and aromatic hydrocarbons with carbon numbers in the range of C9–C28 and with a boiling-range of 150–390°C. Kerosene-type diesel fuel (diesel fuel No. 1) is manufactured from straight-run petroleum distillates [5]." Quote Link to post Share on other sites
LBD 128 Posted April 12, 2023 Share Posted April 12, 2023 Loctite 515....(Gasket eliminator) for flanges with uneven gaps up to 0.25mm But If the flange faces are very un-even and you may have gaps larger than 0.25mm, then you may need to use a thin cork gasket. Quote Link to post Share on other sites
Ex Machina 366 Posted April 22, 2023 Share Posted April 22, 2023 Permatex have 5 or 6 hydrocarbon proof sealants and gasket goos 1 Quote Link to post Share on other sites
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