DeKuyper® Triple Sec. The Brand Bartenders Trust. 48 Proof. DeKuyper Triple Sec brings you all-natural, bartender-quality flavor so you can mix classic cocktails or create your own signature drinks. DeKuyper is committed to providing you with cordials of the highest quality. We use all-natural flavors, and our products do not contain high fructose corn syrup. DeKuyper, the brand bartenders trust. For additional recipes: www.dekuyperusa.com.