Will this seal odor? I’m trying to eliminate the odor from a whiskey barrel yet this says it’s breathable. ?

Hi Rhon! Although breathable, odor will likely not seep through. Ultimately we'd recommend testing before starting, but that may not be the easiest in this situation. When you get a chance, send us an email at humans@flexsealproducts.com with more details. We're here to help!