WB Rubber applies self-leveling compound to correct uneven interior concrete floors before rubber flooring installation across Texas. The poured compound flows to fill low areas, cures in approximately 24 hours, and produces a flat surface that rubber flooring bonds to cleanly and performs on reliably. We determine whether leveling compound or grinding is the right approach for your specific floor.
Self-leveling compound is a cementitious or gypsum-based product that is mixed and poured onto a prepared floor surface. The material flows freely and settles to a flat plane under gravity, filling low areas and producing a uniform surface across the pour area without manual screeding. This makes it effective for correcting floor variance over large areas where grinding would be impractical.
Interior concrete floors in commercial buildings, gyms, barns, and industrial spaces develop unevenness over time from settling, load cycling, and construction tolerances that may have been acceptable for previous floor coverings but are not adequate for rubber flooring. Self-leveling compound addresses floor variance from minor surface irregularity up to about one inch of depth depending on the product used.
Most self-leveling compound products reach foot traffic strength in 24 hours and flooring installation strength in 24 to 48 hours depending on pour thickness and ambient conditions. This cure time is predictable and allows rubber flooring installation to be scheduled within a day of the leveling pour. WB Rubber incorporates cure time into project scheduling so there is no unnecessary delay between preparation and installation.
Self-leveling compound thickness is determined by the depth of the low areas being corrected. Most products have a minimum application thickness of about 1/8 inch and a maximum pour depth per lift of 1 to 1.5 inches. Deeper corrections require multiple pours with cure time between lifts. WB Rubber measures floor variance before the job to specify the correct pour depth and number of lifts required.
Not every uneven floor needs self-leveling compound. Localized high spots are better addressed with grinding. Small isolated depressions can be filled with patching compound. Large-scale floor variance over a wide area is where self-leveling compound provides the most value. WB Rubber evaluates your specific floor and recommends the preparation method that is most effective and most cost-efficient for the conditions present.
Rubber flooring installed over an uneven floor bonds inconsistently, wears unevenly, and develops surface defects that track back to the substrate condition. A properly leveled floor produced by self-leveling compound gives the rubber flooring full contact with the substrate, consistent adhesive bonding across the entire area, and a surface free of the high-load points that cause premature wear.
Self-leveling compound is a fluid-applied floor underlayment that corrects surface variance in concrete floors before finish flooring is installed. Unlike patching compounds or grinding, which address localized defects, self-leveling compound can correct floor variance across an entire room or bay in a single pour. This makes it the most practical solution when an interior concrete floor is consistently wavy, has multiple low areas distributed across the surface, or has settled unevenly over time.
The product arrives as a dry powder that is mixed with water to the manufacturer's specified consistency and then poured onto the prepared floor surface. Once poured, the material flows across the floor and settles to a flat plane. The compound fills low areas first and then builds up to the thickness required across the entire pour zone. A gauge rake or gauge pins are used to control pour thickness in areas where a specific depth is needed, but the material's tendency to self-level does most of the work.
Preparation before the pour is critical. The concrete surface must be clean, free of oil and contaminants, and properly primed with a bonding primer compatible with the leveling compound being used. Skipping primer or using an incompatible product results in delamination, where the cured compound separates from the concrete below it. WB Rubber uses compatible primer and compound products and follows proper application procedures so the leveled surface stays bonded for the life of the rubber flooring above it. See our surface profiling page for how we prepare the concrete before priming.
After curing, the result is a smooth, flat concrete surface that rubber flooring can be installed on directly using appropriate adhesive or floating methods. The compound surface is comparable to a freshly finished concrete slab in terms of its flatness and the quality of bonding surface it provides. For larger-scale concrete preparation including crack repair and grinding, see our concrete leveling page.
When a concrete floor has surface issues that need correction before rubber flooring installation, the two most common preparation approaches are self-leveling compound and concrete grinding. WB Rubber evaluates the specific floor conditions to determine which approach, or which combination of approaches, is right for the situation. Using the wrong method wastes money and time without solving the actual problem.
Concrete grinding is most effective for isolated high spots, ridges, raised crack edges, and localized protrusions. A floor that is generally flat but has a few specific areas that are too high is a grinding candidate. Grinding removes material precisely from the elevated areas without affecting the surrounding floor and produces a result in a single visit without any cure time. It is the faster and less expensive option when the issues are localized.
Self-leveling compound is most effective when the floor has multiple low areas spread across a large surface, when the floor has a consistent bow or sag that affects a wide area, or when the variance is distributed enough that grinding would require covering too large a percentage of the floor to be practical. Pouring compound over a large floor area is a single operation that corrects distributed variance more efficiently than grinding each individual low spot separately.
Some floors require both approaches. A floor with distributed low areas and several significant high spots is best addressed by grinding the high spots first, then pouring leveling compound to correct the low areas. WB Rubber assesses the full floor and builds the preparation scope around what will actually produce a flat, sound substrate for the rubber flooring, not around what is simplest to bid.
For an overview of all our floor preparation services, visit our flooring preparation page. To learn about all ground leveling options, see our ground leveling services page.
Common questions about self-leveling compound from WB Rubber customers.
