Renewed version of the original Duralac, it is a plastic insulator and sealant used to prevent galvanic corrosion at the contact point between two different metals, such as: aluminum cleats fixed with stainless steel screws, aluminum or brass winches fixed with stainless steel bolts, stainless steel accessories for shafts fixed on the shaft itself (in aluminum) with rivets or screws, bollards coupled with studs of different metal.It is a yellow, chrome-free, durable and flexible paste that is interposed between two metals during coupling.Applied with a brush and should not be diluted.