How do I keep stamped concrete from getting slippery?

The most effective fix is a slip-resistant additive mixed into the final coat of sealer the next time you reseal, along with resisting the urge to add coats for shine. Between reseals, keep the surface clean and free of standing water, and in winter use sand for traction rather than heavy salt. If the patio is slick everywhere, the sealer choice is the place to start.

Why stamped concrete gets slippery

Bare concrete has a fine, gritty texture. Sealer changes that. Most acrylic sealers will darken concrete and leave a glossy shine to some extent,^[7] and some are sold that way: one professional acrylic sealer markets as a "High gloss formula".^[6] A smooth film over a smooth stamp texture can be slick under water, and the same manufacturer's instruction is plain: "For a slip-resistant surface, add INCRETE SHUR GRIP to the final coat of sealer".^[6]

Extra coats make it worse. Heavy coats of sealer, or a buildup of sealer applied numerous times over the years,^[7] can trap moisture under the film until it turns white and peels, and every coat fills the texture a little more. The rest is everyday: wet leaves, pollen, mildew in shaded corners, and water that sits where a downspout empties.

Add grip when you reseal

Slip-resistant additives are fine particles you stir into the sealer. Once it dries, they leave a slightly textured surface that grips better when wet. There are several types, and they are not interchangeable.

Polypropylene additives for decorative concrete. Euclid's Increte Shur-Grip, for example, is a colorless, finely graded polypropylene additive that leaves a finely textured surface,^[1] dosed at 1 cup per gallon of sealer,^[1] and designed for use in solvent-based sealers.^[1] Its sister product, Ultra-Grip, uses a larger particle for places where slip hazards are more severe.^[2] Euclid says Shur-Grip can be used to create a static coefficient of friction of 0.8 or greater, while noting that results vary with the coating, the surface and how it is applied.^[1]

Polymer additives for water-based and oil-based products. Sherwin-Williams sells H&C SharkGrip for latex-based and oil-based coatings, stains and sealers,^[3] and describes it as adding slip resistance, fine texturing, and gloss reduction.^[3]

Grit additives for paints and coatings. Rust-Oleum's Anti-Skid Additive is sold as an aluminum oxide based additive for epoxy, latex or oil-based paints and stains.^[4]

Whatever you use, the application rules are much the same. Rust-Oleum says that if you apply more than one coat, mix it into the final coat only,^[4] and to remix several times during use so settled additive goes back into the coating.^[4] Shur-Grip's instructions add to apply the sealer as directed without over-rolling.^[1] Do a test patch, let it cure, and check the feel and look when wet before doing the whole patio. The full reseal process is in how to clean and reseal stamped concrete.

Consider a less glossy finish

Gloss and slipperiness often go together. A flattening additive can take the shine down: Euclid's Matte Add turns a solvent-based acrylic sealer into a low-gloss coating,^[5] but it is not recommended for water-based sealers.^[5] Ask your supplier which low-gloss options suit the sealer already on your patio.

A penetrating sealer is the other route. One water-based penetrating water repellent soaks into the concrete and is described as non film-forming, leaving no gloss or shine; it does not alter the appearance or texture of the substrate,^[8] which leaves the stamp closer to bare concrete. The trade-off is looks, since a film-forming sealer is what deepens the color. The same product needs a surface that is clean, dry and free of all curing compounds, form release agents and any other contaminants,^[8] so switching from a film-forming sealer usually means stripping the old one first. If color has already been fading, read why stamped concrete fades before you choose.

Everyday habits that help

• Sweep often in fall, when wet leaves make a patio slick.
• Wash off mildew and algae in shaded areas with mild detergent and a stiff brush, and rinse.
• Keep water moving. Point downspouts away from the patio and keep drains clear. A low spot that holds water is often a base problem, not a sealer problem.
• Mats at doors catch water and grit where people step on and off the slab.

Winter traction without damage

For ice, clean sand gives traction without harming the surface. Be careful with melting products: the Federal Highway Administration has linked calcium chloride and magnesium chloride deicers to a form of deterioration on concrete that starts at the joints and can progress into disintegration of the concrete.^[9] New concrete needs more care still: the Town of Berryville asks residents to avoid salt and other deicers on new concrete for about a year and suggests alternatives such as sand, sawdust, clean kitty litter, and birdseed.^[10] They do not melt ice, but they do improve grip.

Stop and call a pro if

• Steps, ramps or a pool deck are slippery. These need a dependable fix, and a contractor can strip and reseal with the right additive and texture.
• The sealer has built up into a thick, glossy or peeling layer. Removing it takes stripping or blasting.
• Water pools because part of the slab has sunk or slopes the wrong way.
• Someone has already fallen, or the patio serves older adults or a rental property where you need it right the first time.

Getting help in Virginia

Loclis lists DPOR-licensed businesses with their licence number and class. Browse stamped and decorative concrete, look up concrete contractors in Blacksburg, or read more concrete and hardscaping answers, including whether stamped concrete suits a Virginia patio.

Describe the slippery patio once and licensed local concrete businesses quote the fix.