This document specifies the requirements for a two-components flexible polyurethane topcoat to be applied over EN 4687 and/or EN 4688 primers mainly for exterior aerospace applications.
The primer and the finish tested to this document will be from the same manufacturer applied in accordance with (i.a.w.) their instructions/Table 1.
WITHDRAWN
SSH EN 4689:2012
IN_DEVELOPMENT
prSSH EN 4689:2021
40.20
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Feb 9, 2026
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