No Need for Pruning Sealers
You just removed a huge branch from your favorite tree and this leaves a gaping wound on the trunk. Now you have to seal the wound to prevent infection, right? At least that’s what gardeners long believed. And different suppliers even developed sealing products (various paints, pastes and waxes) specifically designed to cover the wounds.
But we know today that sealing tree wounds is not worthwhile. Instead of protecting the tree against infections, sealing products keep the wound moist rather than letting it dry. And it is when injury is moist that infections develop. So the best thing to do – even when you remove a major branch is – nothing at all! Mother Nature will take care of the patient all on her own.