A novel adaptable network based on the reversible hetero Diels–Alder reaction of a cyanodithioester and cyclopentadiene is presented. Reversible between 50–120 °C, the adjustable and self-healing features of the network are evidenced via temperature dependent rheology experiments and repetitive tensile tests whereas the network's chemical structure is explored by temperature dependent 1H MAS-NMR spectroscopy. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

Adaptable Hetero Diels–Alder Networks for Fast Self‐Healing under Mild Conditions