ToughTimber (Covers Up to 1,000 SqFt) Waterproof Deck Sealer, Wood Sealer, Cedar Roof Sealer - Great for Porous Wood As Waterproof Sealer and Water Repellent - 1 Gal Concentrate Silane/Siloxane Blend: Amazon.com:
Thompson's WaterSeal Signature Series Clear Exterior Wood Stain and Sealer (5-Gallon) in the Exterior Stains department at Lowes.com