Brodak Sanding Sealer is 99% as good as the old Aero Gloss Dope. All Brodak is actually re-packaged Randolph Dope.
Sig is ok, but it needs at least 1 part thinner to 2 parts Sealer to thin it. I do not know who makes the dope products for Sig or if they make themselves. Their sealer is definitely different from the Brodak products.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !