How to Waterproof Wood - A Guide on Waterproofing Wood
Thompsons Waterseal Transparent Chestnut Brown Waterproofing Wood Stain & Sealer, 5 gal
Rainguard Water Sealers Wood Sealer Clear, Natural Super Flat Transparent Water-based Concentrated Mildew Resistant Mold Resistant Sealer (1-quart) in the Waterproofers & Sealers department at Lowes.com
DeckWise Ipe Seal 1 qt. Clear Waterproofing End Grain Seal for Hardwood IPE-SEAL-1-QT - The Home Depot
Ready Seal - Ready Seal Wood Stain and Sealer - Redwood 520 - 5 Gallon #READY-SEAL-REDWOOD-520-5GL