The next time your tire goes flat, you might be reaching for a can of GÜP. Meant to be a quick fix for flats in tubed or tubeless tires, GÜP is a new product from a company based in SoCal. By combining the sealant with the inflator, the GÜP Kwiki claims to be an all-in-one solution that will get you back on the road or trail in a jiffy.
Sold in 125ml cans, GÜP includes a silicon “speed adapter” that supposedly prevents you from needing to remove the valve core for presta valves, and it works with schrader valves as well.
Adding the sealant and inflating the tire simultaneously is fairly simple, and the foaming latex sealant is said to work on up to 2mm cuts in tubes or tubulars, or 4mm cuts in tubeless tires. With enough volume to fill a 29 x 2.4″ tire to 29psi, and enough pressure to work for road tires as well, the canister comes in at 122g.
If you purchase the Hölster for an additional $3.49, you can easily strap the canister to your bike for easy access.
Each individual can sells for $14.99, or you can order a six pack for $90 (which is oddly $0.06 more expensive). While that’s pretty pricey for an individual flat repair, the convenience might be worth it if it works as advertised, and if you send in five used cans, you’ll get one free.