I have a 4" cast iron waste pipe coming into the basement of a property. It appears to be coated with a woven mesh material which has then been painted. I wondered if anybody had any idea as to what the material could be. I've also come across similar on a 1/2" copper water pipe . Any help gratefully received as looking to bond the pipe subject to further investigation.
There are/were a number of fibreglass & resin mixes used for repair or corrosion proofing.that set hard, as well as at least one that remains sticky like fly paper for years - supposedly to allow settlement, but also to ruin perfectly good trousers.
PS, if it does not conduct, surely no need to connect at that point - it cannot be touched. Move along till you reach bare metal, or a coating you recognise.
There are/were a number of fibreglass & resin mixes used for repair or corrosion proofing.that set hard, as well as at least one that remains sticky like fly paper for years - supposedly to allow settlement, but also to ruin perfectly good trousers.
PS, if it does not conduct, surely no need to connect at that point - it cannot be touched. Move along till you reach bare metal, or a coating you recognise.
