Well before the swear words start flying..... take a deep breath and relax..... XRP has come to the party with these soft alum. conical seals for thirty seven degree flares that simply slide over the end of the fitting once the burr if there is one has been dressed off with a file and go about installing the hose end over the fitting just like normal, tighten the hose end down and go about your business.
Flare seals are sold in four packs sizes -3 thru -10 and two packs -12 thru -20.