for anyone wondering...here is the TDS sheet directly from permatex about the Ultra copper RTV sealant... http://www.permatex.com/documents/td...tive/81878.pdf ...........it even directly says not for use with any parts that come into contact with gasloline.....As well all permatex selants are not to be used with any heavy oxidents, notromethane is a oxident .... as well many are stated as only being oil resistant, not oil proof..Nitro fuel has plenty of oil ...... here is the Permatex site if you wish to research the different characteristics of their products, as i said before not all RTV's are the same..... http://www.permatex.com/products/Aut...ket_makers.htm ...........you guys can read for youselves I was telling the truth the whole time, yu were just to ignorant to realize you maybe don't know nearly as much as you thought you did.................... thank you, come again !