Ready Seal 505 5-Gallon Pail Light Oak Exterior Wood Stain and Sealer Requires no primer. Ready Seal is darkest when first applied. It reaches its true color in approximately 14 days. Do not apply Ready Seal over painted or newly stained surfaces. Sealed surfaces inhibit penetration. May be applied using sprayer, roller or brush Requires no back brushing or wet-line application Can be applied in any temperature range