The Slime brand that Walmart carries seem to be good ones. One thing I definitely recommend is using glue (I like Monkey Grip) in conjunction with the plugs. In my air compressor bag, I have a plug kit with PLENTY of plugs (never know when the worst might happen) and a good sized can of glue. Not sure what size it is, but would guess around 8 ounces.Can you guys recommend a tire plug kit? Any must have or worthless features? I've never had to plug a tire, but I used to work at a gas station where we patched them.