Zinsser Bulls Eye Shellac makes a great pruning sealer

Bulls Eye Shellac is an alcohol-based solution of lac, a natural resin. Dries transparent with a faint, golden cast that is much lighter than oil-base varnis

Zinsser Shellac Finishes

Zinsser Bulls Eye Amber Shellac Finish and Sealer 1 qt - Ace Hardware

Rust-Oleum Zinsser 304H 1-Quart Bulls Eye Clear Shellac - Household Varnishes

Zinsser Bulls Eye Clear Flat Alcohol-based Shellac Aerosol Spray (12-oz) in the Sealers department at

Zinsser Bulls Eye 1-2-3 Water-Based Primer & Sealer, Interior / Exterior, White - Brush-On Primers

Zinsser 1 gal. Universal Sanding Sealers 851 - The Home Depot

Zinsser Bulls Eye 123 Deep Tint White Primer and Sealer 1 gal - Ace Hardware

Stains and Finishes - Ace Hardware

Bulls Eye Clear Shellac Spray 12 Ounce