Guide
California VOC limits for floor finish and wax stripper
Every strip and refinish on a school corridor in Modesto or a clinic hallway in Santa Clara runs on two products, a stripper and a finish, and California caps the volatile organic compounds in both. This guide sets out the CARB limits that apply, what they mean on the label and how they shape product choice for resilient floors.
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Why refinishing in California starts with the label
A resilient floor such as vinyl composition tile is refinished in two chemical steps. A stripper breaks down the old finish so it can be scrubbed and picked up, and fresh coats of finish are laid down once the tile is clean and dry. Both products are sold as consumer products in California, and both fall under limits set by the California Air Resources Board.
CARB’s consumer products program exists to cut the volatile organic compounds, toxic air contaminants and greenhouse gases released when chemically formulated products are used. Its standards sit in Title 17 of the California Code of Regulations, and the table in section 94509 assigns a VOC limit to each product category, floor products included.
For a property manager, the practical effect shows up on the container. The category a product belongs to, its VOC content and, for strippers, the dilution printed on the label all trace back to that table, and they decide which products a crew can bring onto a California floor.
The floor product categories CARB defines
Section 94508 defines a floor polish or wax as a product that polishes, waxes, conditions, protects, temporarily seals or otherwise enhances a floor by leaving a protective finish meant to be replenished from time to time. That covers the acrylic finishes used on VCT and similar resilient tile, and the definition splits them by flooring: resilient material such as linoleum and cork, nonresilient mineral flooring, and wax made solely for wood floors.
A floor maintenance product is a separate category for products that restore, maintain or enhance a finish already on the floor. A floor wax stripper is a product that removes natural or synthetic polishes by breaking down the polish polymers or by dissolving or emulsifying them. Aerosol strippers and products that remove wax only by abrasion sit outside that stripper definition.
The floor polish category also leaves out coatings that fall under architectural coatings regulations. Epoxy, urethane and concrete sealers belong to that other set of rules, which matters when a building has both finished tile and coated concrete.
The limits in plain numbers
Since the end of 2010, floor polish or wax for resilient flooring and for nonresilient flooring has been held to 1 percent VOC by weight. Wax made for wood floors carries a 70 percent limit. Floor maintenance products are held to 1 percent as well.
Strippers are handled differently because they are diluted before use. Section 94509(j) requires the label of every nonaerosol floor wax stripper to give a dilution ratio for light or medium build-up that brings the as-used VOC content to 3 percent by weight or less. A stripper also sold for heavy build-up must print a second ratio that keeps the as-used solution at 12 percent or less.
The regulation accepts comparable wording for the build-up levels, so labels describe them in different ways. For products diluted with water, the VOC limits apply once the minimum recommended dilution has taken place, which is why the mixing instructions are part of the rule rather than a suggestion.
What the limits mean for product choice on the job
Start with the floor’s build-up, not the bottle. A corridor that was recoated many times over its last cycle carries a thick finish layer, while a breakroom refinished recently carries a thin one. Matching the label’s light, medium or heavy build-up ratio to the floor we find on the walkthrough keeps the solution within the as-used limit and avoids wasting stripper on a floor that needs less.
Finish choice follows the same logic. Water-based acrylic finishes sold for resilient floors in California are made to the 1 percent limit, so the decision between them rests on gloss, durability under the building’s traffic, how the finish responds to burnishing and how long it needs to cure before the floor reopens. Clinics add one more test, resistance to daily disinfectant, which the healthcare floor care guide covers.
Low VOC content does not remove the need for airflow. A strip and refinish puts a large volume of wet product on the floor at once, so we plan ventilation with the building and keep each area closed through drying and cure, as the dry and cure time guide describes. The full process is set out on the floor stripping and waxing page.
Where concrete coatings fit
Coatings on concrete answer to a different authority. CARB describes control of VOC emissions from architectural coatings as primarily the responsibility of the air districts, which adopt, carry out and enforce their own coating rules. An epoxy coating project in Sacramento and one in the Bay Area therefore follow their own district’s rule.
Installing or recoating those systems is specialist coating work. For coated concrete, the everyday question is cleaning it without dulling the surface, which the epoxy floor cleaning guide covers in detail.
A few useful answers
Quick answers.
What is the VOC limit for floor finish in California?
Floor polish or wax for resilient and nonresilient flooring is limited to 1 percent VOC by weight under Title 17 section 94509. Wood floor wax carries a 70 percent limit.
How is a floor wax stripper’s VOC content measured?
It is measured as used, at the dilution on the label: 3 percent by weight or less for light or medium build-up, and 12 percent or less for heavy build-up.
Do these limits cover epoxy and concrete sealers?
Those products are coatings, which CARB’s floor polish definition leaves out. Their VOC rules come from the local air district.
Can a stripper be mixed stronger for a stubborn floor?
Use the label’s heavy build-up ratio, which the regulation keeps at 12 percent VOC as used. Mixing beyond the label takes the solution outside what it was made for.
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