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You can add an integral color when you mix the concrete or you can color with an acid stain after the concrete has cured. If you use an acid stain, you will need to neutralize the acid with an ammonia/water mixture. Whether you use integral color or acid stain, it is highly recommended that you use a concrete sealer (water based is fine) before using your concrete planter — it protects the concrete and enhances the color.

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