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Is my boat Hypalon or PVC?

This document describes how to tell if a boat is PVC Hypalon or urethane. Hypalon and Neopreme are repaired in much the same way. PVC and urethane are repaired in much the same way except that we use a scotch brite pad and with very little methyl ethyl keytone or Acetone (nail polish remover) to buff the surface of urethane.

Urethanes (with the exception of the sprayed on coatings) are meltable plastics. You may find a spot (such as a grommet strip) that you can test for melting. Methyl Ethyl Keytone and acetone are solvents for PVC and the color of the fabric should come off on a clean white rag used to prepare the surface for gluing. It is not so easy with urethane. Some urethanes do show color, and some do not with this process. They should become tacky with the use of acetone or MEK. However as they get older, they get harder and more brittle. This makes it more difficult to tell. Test it where the sun has not effected it. Urethanes are very slick compared to both PVC and Hypalon. We use the same glue for Urethane and PVC. MEK and acetone do nothing to Hypalon or Neopreme.


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