Ask serious rum drinkers to name the most respected distillery working today, and Foursquare comes up again and again. The Barbados distillery has built that reputation on a simple, stubborn rule: no added sugar, no added color, no added flavor. Just molasses, fermentation, distillation, and time in wood.
This guide covers how Foursquare makes its rum, what the Exceptional Cask Selection series is, and which bottles to look for now that the series has officially ended.
The Distillery
Foursquare sits at Four Roads in the parish of St. Philip, on the southeast side of Barbados. The family business behind it, R.L. Seale & Co., was founded in 1926 by Reginald Leon Seale as a rum merchant. The distillery itself is much younger: the site was a sugar factory until the late 1980s, the Seale family took it over in 1995, and distilling began in 1996.
Today it's run by fourth-generation master distiller and blender Richard Seale, son of Sir David Seale. The distillery holds more than 45,000 casks and is the largest privately owned rum exporter on the island.
Foursquare's equipment is the key to its style. It runs two double-retort copper pot stills and a twin-column Coffey still. Pot stills make heavier, more flavorful spirit; the column makes a lighter one. Nearly every premium Foursquare release is a blend of both, aged together or separately, which the distillery calls a "single blended rum": pot and column spirit from one distillery.
Richard Seale is also one of the loudest voices in rum for honest production. Foursquare, along with Mount Gay and St. Nicholas Abbey, backs a proposed Barbados geographical indication that would require rum labeled "Barbados" to be aged on the island and ban added sugar and flavorings. As of mid-2025 the GI was still unresolved after roughly five years of dispute.
The Exceptional Cask Selection (ECS)
The Exceptional Cask Selection is Foursquare's limited series of numbered releases, each called a "Mark." Seale bottled a Mark only when he judged a batch genuinely exceptional. Mark I, a 1998 vintage, came out in 2008. Over the next 18 years the series ran to 31 Marks, and it closed in March 2026 with Epilogue.
ECS releases share a few traits: pot and column blends, no additives, high proof, and often a combination of ex-bourbon casks with a second cask type such as Madeira, port, sherry, or wine. Most ran in limited bottle counts, which is why they disappear fast.
The Bottles to Know
The vintage Single Blends. Foursquare released a run of 12-year vintages aged in ex-bourbon casks and bottled around 60% ABV. They're the clearest picture of the house style without a finishing cask in the way: the 2008 (Mark XIII), 2009 (Mark XVII), 2010 (Mark XXI), and 2011 (Mark XXIV).
Sagacity (Mark XI, 2019). A 12-year 2007 vintage aged in bourbon and Madeira casks and bottled at 48%, one of the lower-proof ECS releases and a good entry point to the series.
Redoutable (Mark XV, 2020). A 14-year 2006 vintage from bourbon and Madeira casks at 61%.
Indelible (Mark XVIII, 2021). An 11-year rum from bourbon and Zinfandel wine casks.
Covenant (Mark XXIII, 2023). An 18-year rum aged entirely in ex-bourbon casks, bottled at 58%.
Equipoise (Mark XXV, 2023). A 14-year blend: one part 10 years in bourbon plus 4 years in Calvados casks, one part 14 years in bourbon, at 61%.
Magisterium (Mark XXVI, 2024). A 16-year pot and column blend from bourbon and oloroso sherry casks at 58%.
Equidem (Mark XXVII). A 14-year rum: 5 years in bourbon, then 9 years in Black Muscat casks, at 61%.
Convocation (Mark XXVIII, 2025). A 14-year blend of one part bourbon-aged and one part Madeira-aged rum, at 62%.
Mandamus (Mark XXIX, 2025). A 16-year rum: 10 years in bourbon, then 6 years in port, at 57%.
Penultimus (Mark XXX, 2026). The second-to-last chapter, as the name says. A 15-year rum that uses Moscatel casks for the first time in the series, at 57%.
Epilogue (Mark XXXI, 2026). The final ECS release and the oldest: 19 years in ex-bourbon casks, bottled at 57%. At the 2026 IWSC, Epilogue, Mandamus, and Penultimus each scored 98 points and took Gold Outstanding medals.
Beyond the ECS
Probitas White is a joint project between Foursquare and Jamaica's Hampden Estate. It blends unaged Hampden pot still rum with unaged Foursquare column rum and 2-year-old Foursquare pot still rum, bottled at 47%. It's billed as the first direct collaboration between distilleries on two different Caribbean islands, and its pot still backbone makes it a natural fit for a Daiquiri.
Foursquare Crisma is a 17% cream liqueur built on aged Barbados rum with cream, vanilla, and coffee.
Foursquare also makes the island's everyday heritage brands, including Doorly's (whose Doorly Macaw was the first bottled rum exported from Barbados), Old Brigand, E.S.A. Field, and R.L. Seale's.
How to Drink Foursquare
ECS bottles are sipping rums. Most are bottled well above 50% ABV, so try them neat first, then add a few drops of water and see how the aroma opens up. Save Probitas and the younger blends for cocktails.
With the series closed, every remaining ECS bottle is now a finite supply. If there's a Mark you've been meaning to try, now's the time.