On Amazon tireject prices seem weird.
TireJect Automotive Full-Size Truck/SUV 2-in-1 Tire Sealant & Bead Sealer Kit (2-Pack with Injector) $39.99
TireJect On-Road Trailer 2-in-1 Tire Sealant & Bead Sealer Kit (2-Pack Kit with Injector) $34.99
Both kits have the same contents, $5 price diff.
Anyways, decided to go for tireject from Walmart, Lawn Mower 5-in-1 Off-Road Tire Sealant 30oz for $45.
Quick look at results after 10 days of posts.
Seems like 6 votes for tireject ($140/gallon@amazon), FlatOut by Multi-Seal got 2 votes (~$58 for a gallon of 4 packs@ amazon, but don't buy the 1 gallon jug), Gemplers products, Flat Tire Prevention Commercial grade ($78/gal @ amazon) got 2 votes.