Leaking Brake Fluid

I've got a 93 Civic thats leaking brake fluid where the banjo fitting bolts to the caliper. I've replaced the rubber break line and the caliper as well as the two washers but still have the leak. Should I have used any kind of chemical on the washers and around the banjo fitting to prevent leaking? Any suggestions would be helpful.

Replace both banjo bolts w/ all new washers(2) - torque to 25lb-ft. You dont nead any "chemicals", thats what the washers are for.