Which caulk is best for sealing windows?
On One Hand: Silicone Caulk is BestAccording to Home Tips, silicone caulk is best at sealing windows because it prevents air leaks for up to 50 years. It also states that any silicone blend caulk will work just as well if painting is needed, as full silicone caulk cannot be painted.On the Other: Recognized AlternativesHowever, Factsfacts.com lists possible alternatives including urethane, elastomeric, latex, acrylic and butyl rubber. These can be less messy, less expensive and are all paint-compatible. Some of these might have different qualities when comparing brands, and none last as long as silicone.Bottom LineWhile plenty of alternatives to silicone caulk exist, it is the best method for stopping leaks and lasting nearly a lifetime. Use a full silicone caulk to seal windows, unless painting is needed.
