The spiciest sauce is Mad Dog 357 Plutonium No. 9.
Mad Dog 357 Plutonium No. 9 has a Scoville Heat Unit rating of 9 million.
The Mad Dog 357 Plutonium No. 9 sauce is a pepper extract and is very potent and is not intended for casual use or casual consumption.
Other hottest and spiciest sauces are Pure Evil 13 Million sauce and The Last Dab XXX, which uses Pepper X.
The hot sauces that Mexicans prefer is El yucateco sauces, more specifically green chile habanero or extra hot habanero sauce as they are good and are often used in authentic Mexican food joints.
Although Franks's RedHot sauce is not the hottest or spiciest it still is pretty hot and is also considered the number one hot sauce aside from Tabasco sauce.
Another hot sauce that is really hot is 100% Pain Hot Sauce that has a whopping 40,600 Scoville units.
100% Pain Hot Sauce is around 20 times hotter than Tabasco sauce.
The hot sauce that most schools uses is Texas Pete hot sauce which delivers great flavor and less sodium than some other hot sauces.