Spectrum Grout Colorant Kit-Dove Gray #370 (Custom BP Colors) Re-colors and seals to give tile that "new look" without re-grouting. Seals and protects grout from stains and moisture. Complete kit includes 8 oz. grout colorant/stain, brush and scrub pad Water based formula that is easy to apply and clean. Highly resistant to wear, sunlight, water and extreme temperatures.