Should You Seal Pavers in Arkansas?

Seal them if staining or colour matters to you in a specific place, and skip it if it does not. Sealing is a finish, not a structural requirement.

ICPI Tech Spec 5, the industry guide on cleaning, sealing and joint stabilization, describes sealers as additional protection against stains, oils, dirt and water, and notes that most of them darken the pavers and enhance the colour. That is the decision in a sentence: do you want that protection and that look, and are you prepared to reapply it?

The places where sealing earns its keep are predictable: under a grill or an outdoor kitchen, under trees that drop leaves and fruit, on a light-coloured paver that shows every mark, and on a driveway where vehicles drip oil. On an open patio of a mid-tone paver with nothing above it, many people never seal and never miss it.

Sealing works on the surface, so it helps with surface problems and does nothing for anything underneath.

Every structural problem a patio can have sits in the right-hand column. If a patio is dipping, rocking or holding water, sealing it makes a failing patio look shinier, and that is all.

It makes the joints the priority, because water getting under the surface is what does the damage here.

The National Weather Service's 1991 to 2020 normals for Drake Field in Fayetteville show the average overnight low at or below freezing on essentially every day from December through February, while the average high stays above freezing on all of them. An ordinary winter day in Northwest Arkansas freezes at night and thaws by afternoon, over and over.

Water that sits in the bedding sand or the base expands each time it freezes. Full, stable joints keep most of that water on the surface and transfer load between units so they move together. Washed-out joints let water straight in and let units start rocking, and topping them up is cheaper and more useful than any coating.

A sealer that reduces absorption can help a porous paver in that cycle, and it helps hold the joint sand. It is a second line of defence, not the first.

Almost always efflorescence, a natural mineral deposit that works its way out of new concrete products and usually fades on its own.

ICPI Tech Spec 5 explains it: as cement hardens it forms calcium hydroxide, which is carried to the surface by moisture and reacts with carbon dioxide in the air to form calcium carbonate, the white bloom. It does not affect the structural performance or durability of the pavers. It can appear immediately or within months, can peak as soon as about sixty days after installation, and can remain for months while weather gradually wears it away.

If a new patio is installed during a dry spell, it may not show until the next wet weather. That is normal.

The practical point is to wait. Sealing over efflorescence locks it under the sealer, and then removing it means stripping the sealer. If it needs to go sooner, proprietary efflorescence cleaners exist for exactly that and should be tested on a small area first.

After efflorescence has run its course and the surface is thoroughly dry, which on new work is usually months rather than days.

Sealing over trapped moisture is what produces a milky haze under the sealer. Pick a spell of dry weather, make sure the pavers have been clean and dry for long enough that the joints are dry too, and seal then.

ICPI's guidance is to keep all traffic off until the sealer is completely dry, typically about 24 hours, so plan it for a time the patio is not needed. Spraying unevenly or letting the nozzle clog leaves blotches, which is more of a problem with water-based products.

A natural or low-sheen finish for anything people walk on wet, and gloss only where you have thought about the consequences.

ICPI Tech Spec 5 warns against over-applying sealer so that the surface becomes slippery when it cures. A glossy, over-sealed pool deck or a shaded walkway that stays damp is genuinely slippery, and that is a safety issue rather than an aesthetic one.

Most sealers also darken the paver and deepen the colour, which some people love and some do not. Try the product on a spare paver or a hidden corner before committing a whole patio to it.

There is no fixed interval. Resealing depends on use, climate and the product, and a sealed patio is a commitment to a cycle.

ICPI says as much: sealers normally need reapplying after a period of wear and weather, with the timing depending on use, climate and sealer quality. High-traffic areas and anything around a grill will wear through sooner. A sealer reapplied on schedule looks good. One applied once and forgotten often looks worse than bare paving after a few years, because it wears unevenly.

If you are not going to keep it up, it is better not to start.

These are the two places where sealing most often pays for itself, because grease and oil are the stains that are hardest to get out.

Under a grill or an outdoor kitchen, fat and marinade drip onto the paving every time it is used, and a porous paver absorbs it quickly. A sealer slows that down enough to wipe it up. A mat under the grill does a similar job for less effort, and many people use both.

On a driveway, vehicle drips are the problem. A sealed surface lets you deal with a spot before it soaks in. Over a large driveway, though, the resealing cycle is real work, so decide whether a stain-hiding colour and prompt cleaning would do the same job.

If you decide to seal, you can do it yourself with care, or have it done. Either way, the preparation, the drying time and the product choice matter far more than who holds the sprayer.

Everything. Sealer locks in whatever is on the surface, including stains, dirt and efflorescence.

ICPI Tech Spec 5 treats cleaning as a separate step that comes first: remove specific stains, then clean the whole area, then remove any efflorescence, then let it dry. Oil, grease, rust, leaf tannin and clay soil each need a different approach, and the guide recommends trying any cleaner on a small area first to check for colour change.

After cleaning, the joints usually need topping up, because cleaning takes some sand out. Refill them, let everything dry properly, then seal. Sealing a patio with half-empty joints wastes the one secondary benefit a sealer brings, which is helping to hold the joint sand in place.

Joints, drainage and edges, in that order, because those are what keep a patio flat through a freeze-thaw winter.

• Keep joints full. Check them each spring and after heavy cleaning, and top up where the sand has dropped.
• Keep drains and outlets clear. A blocked channel drain or a buried pipe outlet turns a well-built patio into a pond.
• Watch the edges. A lifted or missing edge restraint lets the field start to spread. Fix it while it is one section.
• Deal with low spots early. A single dip over a soft spot can be lifted and relaid. Leave it and water makes it bigger.
• Clear leaves and debris. Organic matter in the joints holds water and grows weeds.

None of these involve a product. All of them do more for a patio in Northwest Arkansas than a coat of sealer.

Often, yes. Follow the maker's or supplier's guidance for the specific material, because stones and pavers absorb water very differently.

Concrete pavers are the subject of ICPI's guidance, and most sealers on the market are made for them. Natural stone ranges from dense granite that barely absorbs anything to softer sandstone and limestone that soak up water readily. A product that suits one can leave a film or a colour change on another.

Test first, on an offcut or a hidden corner, and look at it wet and dry. If the look is not what you wanted, it is far easier to walk away from a test patch than from a whole patio.

No. Stabilizers target the joint sand; sealers target the whole surface, and some products do a bit of both.

ICPI describes liquid and dry-applied joint stabilizers. Polymeric joint sand is the familiar dry version: it hardens once wetted and resists being washed out. Liquid stabilizers are applied over the surface and into the joints. Either can help in a freeze-thaw climate by keeping the joints full, which is the thing that matters most here.

Pressure washing is the most common self-inflicted damage we see. Aggressive washing blasts the joint sand out, and the patio then moves because someone cleaned it. Wash gently, keep the nozzle at an angle, and refill the joints afterwards.