NC Lacquer Primer Sealer Recipe

JB's NC Lacquer Primer Sealer
Add 5 grams of your favorite double base powder to 40mls of a 50/50 mix of acetone/denatured alcohol or 99% IPA, once dissolved add the entire contents of a small bottle of nail polish, mix thoroughly.

As far as I know the NC/ nail polish sealer should last indefinitely, especially after it has been applied to a primer and the primer has been inserted into loaded ammo. The only thing I have had to do occasionally to my unused sealer is add a few drops of alcohol to make up for evaporation.