Urethane material sources?

[Philip Tschersich]

I want to do some mods to one of my Alpacka rafts and am looking for a source of Urethane coated material similar to what the main tubes of the raft are made from. Not just urethane-coated nylon like typical 'waterproof fabric', but actual light raft material. Something like 70D would be good. I don't want some crazy heavy big boat material. I am trying to get some of the NRS raft pieces from NRS, but they are backordered for a while. Does the heat-seal heat sealable 70D taffeta or 200D Oxford that Seattle Fabrics sells for drybag material work? They don't state what the coating is. It's listed near the bottom of this page:

Coated Nylons

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