If you purchase an independently reviewed product or service through a link on our website, Robb Report may receive an affiliate commission.

Enough with the hazmat whiskey already. Counterpoint—how about some new hazmat whiskey? The latest expression that shatters the 140-proof mark comes from Louisville blender Barrell Craft Spirits, and this is one blend of whiskeys finished in Caribbean rum barrels that should be on any whiskey masochist’s bottle list.

We’re kidding, more or less, because this whiskey is actually pretty drinkable for the first sip or two, but it’s questionable how much more than that you will be able to tolerate. Of course, that is less of a warning and more of a challenge to devotees of hazmat whiskey, a term that indicates that the liquid is bottled at more than 140 proof and deemed unsafe by the FAA to bring onboard aircraft due to its volatility. Barrell Craft Spirits’ Hazmat Triple Rum Cask Finish Whiskey clocks in at 142.24 proof (71.12 percent ABV), which is certainly not the strongest whiskey you can find on the market but plenty strong enough. In fact, it is actually slightly less than Barrell’s last hazmat release, a blend of Canadian whiskies bottled at 142.7 proof.

All of the whiskeys released by Barrell Craft Spirits, with a couple of exceptions like its Foundation Series that’s bottled at 100 proof, come in at cask-strength. That usually means the spirits land somewhere between 110 and 120 proof, muscular but totally reasonable levels of alcohol for a bourbon or any other category of whiskey. But the whiskeys selected for this new release were on the extreme end of the spectrum, making the final barrel proof of the blend as high as it is. The components (bourbon, American whiskey, and Canadian whisky) were distilled in Indiana, Tennessee, and Canada, and while the exact distilleries are not revealed, some reasonable guesses might include MGP, Dickel, and Alberta Distillers (these are unconfirmed, of course). The ages of the whiskeys are not specified, only that some of the liquid was matured for up to 25 years and the proof ranged from 116 all the way up to a staggering 158.

According to a rep for the brand, some of the whiskeys were finished before blending and others after blending, but the time period was six to 18 months in rum barrels sourced from Jamaica, Barbados, and St. Lucia. “This dual approach allowed us to layer complexity and balance the distinct character of each cask type,” the rep told Robb Report. “The final whiskey represents a thoughtful combination of those diverse finishes, showcasing the depth and vibrancy each island’s rum profile contributes.”

Despite its alcoholic vigor, this is a whiskey worth trying (or perhaps worth micro-dosing). The Canadian whisky element leads the way on the palate, with notes of honey, vanilla, maple, and dried fruit, but the rum barrel-finish also makes its presence known with flavors like tropical fruit, banana, brown sugar, and spiced apple cake in the mix. Of course, all of this comes against the backdrop of a very strong element of heat from that super-high ABV, so please don’t be shy about adding a bit of water or a large ice cube once you’ve had a chance to taste it neat. Your tongue and esophagus and stomach lining will thank you for it.

Hazmat Triple Rum Cask Finish Whiskey is available now from the BCS website and various secondary retailers (SRP $200), and you can find many other expressions available to purchase at ReserveBar now.