I bought a 1958 house with a boiler that has copper pipes in the eves taking the hot water to the upstairs bedrooms for heat. The pipes in the eves had burst before I bought it. I had it repaired. Now it is getting very cold and so I bought the foam insulation at Lowes and crawled through and put it on. The kind with the tape you pull of and seal after covering the copper pipe. The box I pulled the tubes out of said for copper and somthing else. I told my future father in law what i did and he freaked and said it would melt. Do I need to take it off? fran PS I put it on the return pipe too.