With the introduction of the new pressure treated lumber products many contractors have found that a barrier is needed to keep their metal safe. The new wood products containing CA or ACQ have higher levels of copper than previous pressure treated lumbers. These products when in contact with metal panels or aluminum faced insulation, such as ESP Low-E® Insulation, can cause electrolysis or rusting. At the request of customers and contractors ESP has answered with a brand new product designed specifically for this application. Alum-E-Shield is a light-weight peel and stick product made to make installation fast and easy!