I've been making my own sealant for years now.  Comparing with my buddies it seems roughly as effective as Stan's at sealing and lasts far better through summer for a fraction of the price.  The one thing I don't like about my recipe is that it uses regular car tire slime.   My recipe: 16 oz latex mold builder 2 oz ammonia without added soap 32 oz pink RV antifreeze propylene glycol based 32 oz car tire slime Anyone have their own recipe that doesn't use tire slime?  I was thin