Wood glue is the 'folk remedy' approach. Fabric covered aircraft used dope.
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Aircraft dope is a plasticised lacquer that is applied to fabric-covered aircraft. It tightens and stiffens fabric stretched over airframes, which renders them airtight and weatherproof. Typical doping agents include nitrocellulose, cellulose acetate and cellulose acetate butyrate.
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en.wikipedia.org/wiki/Aircraft_dope