Best deal: $17.92 per gallon (58.8% below the median) — Thompson’s WaterSeal Multi-Surface Waterproofer Stain, Clear, 1 Gallon
Price range: $17.92 – $135.68 per gallon across 64 offers. Median sits at $43.52.
Top brands showing: Thompson Water Seal, Ready Seal, Seal.
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