Introduced in March, the Signature Series of waterproofing and staining products from Thompson’s WaterSeal is sold only at Lowe’s retail outlets. According to the manufacturer, the finishes can be applied in one coat and drying time is two hours. Both clear and pigmented versions are available. The pigmented Stain & Sealer comes in three opacities (transparent, semi-transparent, and solid) and in four colors (two shades of brown, cedar, and honey gold). Look for Thompson’s standard square can; prices range from $16 to $29 a gallon. Thompson’s WaterSeal,