Why You Should Never Use Pruning Sealant on Your Trees

Tina Graver

Published on: 01/07/2025

Avoid using pruning sealants on trees—these waterproof coatings trap moisture and decay, hindering natural healing. Learn why trees need to breathe, how they compartmentalize wounds, and when (and why) a wound dressing is only used on oaks and elms during the growing season. Written by a Board Certified Master Arborist.