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Yes, you should seal your exposed aggregate concrete to keep it protected from the elements and reduce the risk of cracking and concrete spalling. You’ll need to invest in the cost of resealing your concrete about every three years to keep it in good condition. Unsealed exposed aggregate concrete is susceptible to water damage, stains, chips, cracks, and abrasion. Sealers are available in various finishes and levels of gloss. Outdoor exposed aggregate concrete should be sealed with a non-yellowing, UV-resistant sealer to preserve the look of the finish.

There are a few different types of finishes to choose from for the final step of the project. 

Water-based polyurethane sealants emit fewer odors and fumes but dry quickly, which can pose a challenge when trying to get a smooth coat. Oil-based polyurethane sealants let out more odors and fumes into the air (it’s especially important to wear a respirator if you choose this type), but they take longer to dry, which can be more forgiving during the finishing step. 

Some may prefer wood oil to polyurethane because rather than creating a layer, it becomes part of the wood. Wood oil takes longer to dry, and is less resistant to wear and tear; however, it creates a natural-looking result by enhancing the grain of the wood. 

Polishing a concrete floor isn’t as expensive as it sounds—it’s actually one of the more budget-friendly upscale flooring options out there. On average, it costs $4,500, with most projects falling between $1,000 and $8,000 . When you’re working with an existing slab of concrete, you skip material costs entirely, so it’s even more affordable. If you want a glossy, durable floor without paying hardwood or tile prices, polished concrete delivers serious shine without the sticker shock.

Seal every 2-3 years, clean regularly, and repair cracks promptly to maintain appearance and longevity.