Best deal: $17.97 per gallon (50.1% below the median) — Thompson’s WaterSeal Multi-Surface Waterproofer Stain, Clear, 1 Gallon
Price range: $17.97 – $136.99 per gallon across 43 offers. Median sits at $36.00.
Top brands showing: Thompson Water Seal, Ready Seal, Seal.
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