So, one of the things I want to do around these parts is insulate (lag) the hot water piping in this house's basement to the best of my ability (especially since part of it is in a crawlspace that's opened up now, but not normally accessible). It's all 1/2" rigid copper, and I can get pipe insulation (straights and elbows) that fits that rather readily. However, while the straight sections I can get are of the self-adhesive seamed type, the elbows I can find are solid types that must be slit in the field and then attached somehow.
Normally, this is done with a contact cement; however, I can't use solvent-based cements for this due to the safety hazard they pose working around live gas appliances (water heater, gas furnace), and I cannot find water-based cements in small enough quantities for it to matter. (There are also methylene chloride based contact cements, but I want no part of MeCl2, given it's reputation for doing unkind things to people.) So, I am considering using a vinyl pipe-insulation tape to attach the elbow instead. Is this a reasonable thing to do, or will using tape wraps instead of the normal seam-cementing process compromise the insulation performance significantly?