Installing an overlay over existing concrete is a cost-effective way to update concrete surfaces by eliminating tear-out costs, minimizing product expense and reducing the manpower needed to overhaul the look and integrity of the existing surface.
Overlays for concrete today run the gamut so there are plenty to choose from. Following is just a sample of the products available that can help you get the job done:
T1000 Stampable Overlay
Butterfield Color’s T1000 Stampable Overlay gives an old, worn or outdated surface new life with a thin cementitious coating which can be integrally colored, stained, stamped or textured. It’s freeze-thaw stable and can be installed on existing structurally sound interior or exterior slabs.
Spectrum Re-Kote TF
Designed to resurface deteriorated concrete surfaces, Spectrum Re-Kote TF from W.R. Meadows is a single-component, polymer-modified cementitious concrete repair mortar that hardens rapidly. As a resurfacer, which contains a migrating corrosion inhibitor, it creates a trowel texture finish and can be featheredged up to ½-inch deep. As a mortar suitable for horizontal, vertical and overhead repairs, it can be used from a featheredge to 2-inches deep depending on the aggregate.
Easy to use and versatile, Spectrum Re-Kote TF produces a horizontal repaired surface suitable for rubber-wheeled traffic. For overhead or vertical use, it’s an ideal choice for smoothing rough surfaces, repairing honeycombs and dressing up bug holes.
When mixed, the product’s creamy consistency provides an excellent skim coating for swimming pools, concrete walls and balconies. Because of its bond strength, breathable properties and freeze-thaw resistance, Spectrum Re-Kote TF may be used for interior and/or exterior surfaces that are below-, above- or on-grade.
Designed to be used in conjunction with conventional concrete stamping tools, color and sealer, Miracote Mirastamp can restore or transform old existing concrete to produce a distinctive architectural paving finish. The two-component, polymer-modified, thin-stamped cementitious overlayment has very high compressive strength making it well-suited to withstand the wear and tear of commercial vehicular and pedestrian traffic. Combined with its excellent adhesion, freeze/thaw resistance, and tensile and flexural properties, Mirastamp is a good option for both interior and exterior applications in any climate.
Laticrete Supercap SC650-MC is a premium pumpable and pourable self-leveling cementitious overlay that can be tinted. Primarily, it’s used to finish interior concrete and level uneven floor surfaces, but it may also be used as a high-performance self-leveling underlayment. With high-strength properties, it provides a durable, low-maintenance and attractive salt-and-pepper look. SC650-MC can also be polished to a finished wear-surface for striking results in as little as 24 hours.
Stone Edge Surfaces’ MicroTop Mix is a strong, easy-to-use, heavily polymerized cementitious product designed to be applied either horizontally or vertically as a base coat or a smooth finish topcoat. It can also be applied with a mortar sprayer or rolled on with a nap roller.
The overlay can be used to recolor or rejuvenate old, worn or discolored concrete surfaces that have been textured, stamped or carved. MicroTop can also be used on other cementitious products such as existing stone veneer and ready-mix concrete surfaces. The mix can be enhanced with pigments integrally, colored topically with the company’s Liquid Colors, or colored with stains and dyes.
Enhance and level unsightly, irregular concrete floors with Westcoat’s Level-It, a self-leveling flooring system that can be stained, sealed and finished in a variety of ways. It offers a high-build, quick-drying solution for uneven interior floors. Level-It is a good option for both commercial and residential environments including private residences, sunrooms, offices, restaurants, showrooms, and environments with foot and light-wheel traffic.
SureSpray, SureCrete’s No. 1-selling overlay for more than 20 years, was the first single-component overlay made by the company. It was formulated to allow for both textured and smooth concrete overlayment finishes. Today, SureSpray is used to create elegant finishes with textured and stenciled patterns including woodgrain, euro-stone, bubble and stipple. It can be applied via trowel, squeegee or spray. Typical venues where SureSpray is preferred are multifamily housing patios, shopping centers, restaurant floors, pool decks, game rooms and man-caves. SureSpray is available throughout North America, Canada, the Caribbean, South America and the Middle East and has been used in multiple projects in Africa, Australia and China.
The Rosalia Microtopping System from Kingdom Products is a high-performance, two-component, cementitious overlay designed for interior or exterior use. When applied to a properly prepared surface, any floor profile desired can be achieved including glass smooth, spray-down/knock-down or stimpled finishes.
Available in three different grades and offered in white or gray, Rosalia can be applied to achieve numerous effects through various methods using stains, dyes and pigmenting techniques.
As well as being an excellent base for logos, graphics and epoxies, Rosalia can be troweled on vertical surfaces, including shower walls, to create a precast or plaster look. In combination with pigments and stains, Rosalia is ideal for creating realistic wood-grain textures.
Micro-Crete by Euclid Chemical’s Increte Systems brand is a single-component, micro-topping designed for interior and exterior application. Perfect for hiding repairs or transforming dull, old surfaces into brand-new looking concrete, this versatile topping may be broom finished for a nonslip exterior surface or troweled smooth to enhance interior slabs. Due to its polymer-modified formula, this cementitious topping is easy to mix and easy to use and can be applied as thin as a featheredge or built up by adding multiple layers.
Micro-Crete is fast setting and will accept foot traffic in 24 hours. It cures to 4,000 psi (27 MPa) for extended durability and low maintenance. For added interest, the overlay comes in both white and gray formulas, providing a fresh canvas for coloring with acid stains, dyes or integral pigments.
Re-Cap Concrete Resurfacer
If you’re looking for a cost-effective way to improve a home’s curb appeal, Quikrete’s Re-Cap Concrete Resurfacer may be your answer.
It’s an affordable alternative to tearing out old and worn concrete driveways, sidewalks and patios and replacing them. A special blend of portland cement, graded sand, polymer resins and other proprietary additives, this overlay is four times stronger than regular concrete. This means the concrete surfaces being renewed will fracture or crack before their bond with Re-Cap will break.
The resurfacer is a proven shrinkage-compensated repair material for making thin structural repairs to sound concrete in need of surface renewal. Applied with a squeegee, trowel or brush, one 40-pound bag will cover approximately 20 square feet at ¼-inch thick or approximately 90 square feet as a skim coat. The renewed concrete can be walked on in eight hours and driven on in 24.
GSPEC (Green Self-leveling Polyurethane-Epoxy Cement)
There’s got to be a first for everything and GSPEC heads up the environmentally friendly category as the first “green” epoxy-urethane cement overlay that contains no isocyanates and no VOCs. The self-leveling decorative overlay from Green Chemistry Innovations is touted not to crack or stain and produces a natural polished concrete look when finished. It has the durability of a urethane, the chemical resistance of an epoxy and is naturally antimicrobial.
The product differentiates itself from terrazzo in that it can be applied with a gauge rake, back rolled with a nap roller and polished within 24 hours. But the look is more like a beautiful polished concrete, without the typical challenges of microfracture, staining and color drift that you often get with self-leveling concrete.
With its flexibility, control and predictability, Aggretex systems offer contractors multiple cutting-edge design options for decorative concrete overlays. It can be installed wet-on-wet over the system’s Smashed products or placed wet-on-dry over existing concrete. Aggretex’s Smashed line features 19 base colors with pigment and aggregates. The product can be used straight from the bag or combined with other aggregates of your choosing.
For interior projects, Aggretex’s InteriorEFX offers stunning results as a self-leveling, polishable overlay. Integrally colored, the overlay simplifies things for installers by eliminating the guesswork from the job-site chemistry and delivering consistent results. By laying down a fresh canvas with Aggretex’s InteriorEFX, contractors can eliminate unsightly plumbing trenches, adhesive ghosting and variations in aggregate exposure. The line features 13 standard integral colors ready to be poured right out of the bag.