Best deal: $16.95 per gallon (52.8% below the median) — Thompson’s WaterSeal Multi-Surface Waterproofer Stain, Clear, 1 Gallon
Price range: $16.95 – $159.97 per gallon across 26 offers. Median sits at $35.89.
Top brands showing: Thompson Water Seal, Saver Systems Deck, Ready Seal.
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