When caulk is working properly, no one is aware of it, but when sealants fail their importance is clear. As Diana Hun, building technologies researcher at Oak Ridge National Laboratory in Tennessee explains, “Reducing air leakage in residential and commercial buildings is among the most cost-effective means to lower energy consumption.” In fact energy use due to air leakage from buildings is estimated to be 4% of total energy usage in the US. Dow’s Liquid Armor is a one-step, liquid flashing solution. It is a spray sealant, which means application is faster than tape flashing. The fluid nature of Liquid Armor means it readily fills and bridges gaps and is especially effective on rough openings.