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Author:
RaymondMasters (AR)
My dad has always put rubber cement on the outside of the pipe and coupling joints to strengthen them after gluing them together. I recently had a couple people tell me this is a bad idea, because it will in fact weaken/melt the outside of the pipe.
Can someone more knowledgeable here help me out, please?
thanks, so much,
Raymond
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Author:
packy (MA)
your question is best directed at a PVC cement manufacturer rather than a plumber. i (for one) am not a chemist and know nothing about the chemical make up of the rubber cement.
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Author:
North Carolina Plumber (NC)
It's definitely not needed, probably makes for an unprofessional looking job, and may even weaken the pipe.
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Author:
hi (TX)
Rubber cement is an adhesive or a glue. It is Not needed and can mask your solvent welded joint from view and inspection. PVC and ABS pipe are not glued but they are welded using a solvent which melts the plastic and they fuse together as the solvent evaporates. Certain plastics are inpervious to solvents (think polyproplene as used in under sink P-traps) They are usually mechanically joined. In the chemical industry there is heat welding of the plastic pipes for a stronger joint.
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