They have an online store and their website lists several places in Red Hook that sell or serve their whiskeys. Contact them about the possibility of tours or events at their space and to see if their tasting room is open.
From their website:
"Van Brunt Stillhouse takes a time honored traditional approach to distilling. Sourcing wheat, rye and corn directly from upstate New York farmers. Making every spirit from scratch in the waterfront neighborhood of Red Hook in Brooklyn. Our family of whiskeys give a nod to classic styles while remaining innovative, creating bold and flavorful spirits"
6 Bay Street, Brooklyn NY 11203