Can I seal over old Kreem Tank Liner after gasoline has been in the tank?
Yes. Visually inspect the tank interior for good adhesion. If there no peeling you may wash tank out with a degreaser such as warm dish washing solution. Next, rinse tank for 2 minutes using a small amount (1 pint) of acetone or methyl ethyl ketone. Re-coat the tank with Kreem Tank Liner (do NOT use Tank Prep A). If coating is peeling, remove as described above and re-apply after using Tank Prep A and B. Do NOT coat over other manufacturers coatings as we cannot be sure other coatings are compatible with Kreem. Both Harley-Davidson and BMW factory coat their tanks. Do NOT use Tank Prep A on coated tanks until old coating has been removed.