Industrial strength, a very pure form of cyanoacrylate. All are instant bonding, dry clear and can be buffed to a high polish, have incredible bonding stength and can be uses on almost any type of material. Keep unopened bottles in freezer at 32░ or below for extened life. Store used bottles at room temperature. Hot Stuff (Red) Normally sets in 3-10 seconds. Supre T (Yellow) sets in 10-25 seconds. Think like syrup to fill small gaps. Super T (Green) sets in 20-50 seconds depending on material. thicker consistency and greater gap filling ability.