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The actual moisture level that is acceptable for your concrete floor depends on what primer or flooring material you plan to install above it. For this reason, you should check the manufacturer’s instructions for the exact details.

Generally, the moisture levels should be 3.5% to 4.5%, although it does vary. Some products can handle higher levels of moisture, so you should always test your concrete before purchasing your flooring materials.

The biggest downside of sealing concrete is that it needs to be resealed every few years. This routine maintenance can be laborious if you do it yourself and expensive if you hire a professional. Beyond that, sealing concrete can make the surface slippery, which can be dangerous with people with mobility issues, young children, or those with pools near their patios.

Always seal concrete stain to protect against wear and preserve the color. This applies to acid- and water-based stains but not always to concrete paint. Many paints designed for outdoor use contain ingredients designed to protect and waterproof without the need for additional sealant. Fortunately, learning how to seal concrete is something most DIY-savvy homeowners can tackle.

Whether it's better to stain or paint concrete depends on your budget, desired aesthetic, and DIY skill level. Generally, staining is a more durable option because the stain soaks into the concrete's surface and won't wear away like a topical paint coating. Painting concrete can trap moisture underneath the paint layer, which may cause the concrete to deteriorate over time. However, concrete paint offers a wider variety of colors, is typically easier and less expensive to apply, and is effective at covering up existing stains or blemishes on the surface.