How to choose the best anti-slip additives
Choosing the best anti-slip additives for an epoxy or concrete coating project means balancing safety, appearance, and long-term maintenance. This step-by-step checklist is written for homeowners, renovators, and facility managers in Toronto and the Greater Toronto Area who need clear rules to pick, specify, and validate traction solutions for garage, basement, retail, showroom, and warehouse floors.
What anti-slip additives are and when to use them
Anti-slip additives are materials added to a topcoat or broadcast into a wet coating to increase surface texture and improve traction under dry or wet conditions. They are appropriate when a space will see vehicle traffic, regular moisture, de-icing salt, oil and grease, or frequent foot traffic on stairs and ramps. Typical projects that need traction include residential garage epoxy, basement floors that can be damp, exterior entries, and industrial work areas.
JLN Epoxy installs decorative flake systems, metallic epoxy, and commercial coatings and offers traction options as part of each system. The company emphasises surface preparation such as diamond grinding and crack repair as the foundation for an effective anti-slip treatment, because additives perform poorly on contaminated or weak concrete surfaces. For more on service offerings and prep priorities see JLN Epoxy.
Procurement and safety guidance for anti-slip products should include coefficient of friction (CoF) requirements, material choice considerations, visual contrast rules for inspections, and a formal checklist to use with suppliers. For a practical contractor procurement checklist see the Contractors' Anti-Slip Products checklist.
Step 1: identify your project, surface and performance targets
Before you pick an additive, gather the facts that determine compatibility and performance. Record these items and make them part of any quote request.
- Substrate type and condition, for example poured concrete, lightweight concrete, or previously coated surface.
- Coating system and finish you plan to use: flake epoxy, metallic epoxy, clear polyurethane topcoat, or polished concrete.
- Expected traffic: vehicle traffic, pallet jacks, high foot traffic, or light residential use.
- Contaminants and conditions: oil and grease, de-icing salt, standing water, or frequent cleaning with detergents.
- Indoor versus exterior exposure and slope or ramp conditions that increase slip risk.
- Appearance tolerance, for example whether a high-gloss metallic finish must remain mirror-like or if a matte, textured look is acceptable.
Ask suppliers to supply product data sheets and measured performance data for the exact product and the named test method. The procurement checklist referenced above explains which test methods and contract language contractors should request when buying anti-slip products.
Step 2: match additive types to your epoxy or concrete system
There are three practical additive families. Each family has distinct performance and appearance trade-offs and different application methods.
Broadcast aggregates and grit
Broadcast aggregates are coarse particles such as aluminum oxide, silica sand, or specialised grit that installers broadcast onto a wet base coat and then seal with a topcoat. This approach creates a durable, mechanical texture that holds up to vehicle traffic and heavy wear. Broadcast aggregates work well with flake systems and heavy-duty commercial coatings because the coarse texture resists polishing under tires and foot traffic.
Pros include strong mechanical traction and long wear life. Cons include a more textured look, slightly increased cleaning effort, and the need for a properly filled and level base coat so the aggregate sits consistently. JLN Epoxy commonly uses broadcast methods for garage and industrial projects where durability is the priority.
Suspended additives and beads
Suspended additives are fine particles or polymer beads mixed into a topcoat or clear coat so the traction texture is distributed through the film. These are preferred when appearance matters, for example over metallic epoxy, because the fine particles can be selected to be nearly invisible and they reduce loss of sheen compared with coarse grit.
Pros include a subtler look and simpler application when mixed into the topcoat. Cons include reduced longevity compared with coarse aggregates in high wear areas and potential reduction in gloss on high-shine finishes. For a metallic or marble-style epoxy where visual effect is primary, a suspended additive can provide a compromise between grip and look.
Preformed textured topcoats and integrated traction systems
Some manufacturers supply factory-formulated topcoats designed with integrated texture or microbeads. These systems remove the need to broadcast or mix additives on site and often come with published data on adhesion and slip performance. Use these products when you want a calibrated finish and the supplier can provide test data and application guidance that matches your substrate and traffic type.
Preformed textured topcoats can be the best choice when uniform appearance and predictable performance are required for commercial projects.
Step 3: weigh appearance, cleaning and maintenance trade-offs
Every traction choice changes appearance and cleaning requirements. Make these trade-offs explicit before you accept a supplier quote.
- Coarse aggregates create strong traction but trap dirt and may need more aggressive scrubbing or machine cleaning.
- Fine suspended beads alter gloss and can slightly mute metallic effects and highlights on luxury epoxy finishes.
- Integrated textured topcoats provide predictable cleaning and uniform appearance, but may limit ultimate gloss or depth in a decorative floor.
- All textured surfaces are more tolerant of moisture and salt, but oil and grease reduce traction until cleaned, so maintain a cleaning schedule proportional to the exposure.
When aesthetics are a key objective, ask for a mock-up in a discreet area so you and the owner can see how the texture affects colour, gloss, and cleanability before committing to the whole floor.
Step 4: specify measurable slip resistance and procurement language
Do not accept vague claims such as "slip resistant" without data. Include the following items in every quote request and specification so you can compare suppliers objectively.
- Manufacturer product data sheet and technical data sheet for the exact additive or textured topcoat.
- Measured coefficient of friction values for both dry and wet conditions, with the test method named and the test report attached, for example a pendulum test or an ASTM method. Ask the supplier to list the test lab and date of the test.
- Application rate or broadcast rate in grams per square metre and recommended grain size distribution for aggregates.
- Appearance sample and a statement of expected gloss change expressed as measured gloss units or a clear visual sample.
- Warranty and limitations, especially regarding cleaning agents, oil exposure, and vehicle traffic patterns that could accelerate wear.
- Acceptance criteria on site such as a measured CoF target, adhesion test results, and an area mock-up signoff before full installation.
The procurement checklist linked earlier recommends naming the test method and including visual contrast rules for inspection. Use that checklist when preparing contracts or comparing vendor proposals to avoid ambiguous claims and ensure measurable outcomes.
Installation stop points and surface preparation requirements
Anti-slip additives are effective only when the substrate and coating system are sound. Stop installation if any of these conditions exist and resolve them first.
- Contaminated concrete, such as oil stains or release agents, that have not been removed by cleaning and mechanical grinding.
- Lack of a proper mechanical profile. Diamond grinding or equivalent surface profiling is usually required so primers and base coats bond to sound concrete.
- Active moisture or hydrostatic pressure in the slab. Perform moisture testing and resolve moisture issues before coating.
- Unrepaired cracks and delaminations. Cracks must be repaired and patches properly cured prior to broadcasting aggregate or applying textured topcoats.
- Unproven compatibility between the additive and the chosen topcoat. If the manufacturer cannot provide application instructions, test a mock-up area first.
JLN Epoxy lists diamond grinding, cleaning, crack repair, and primer application among its standard preparation steps. These steps are the foundation of a long-lasting finish and of consistent traction performance.
Common objections and how to evaluate vendor claims
Owners often worry about sheen loss, visible grit, harder cleaning, and shorter topcoat life. Use objective checks to evaluate those claims.
- Request lab CoF data and the test method name. If the supplier cannot provide documented test results, consider that a warning sign.
- Ask for in-situ adhesion tests on the same substrate type. Adhesion data is crucial because additives rely on a well-bonded topcoat.
- Request photos of completed projects of the same system and similar traffic, and ask for references you can contact about long-term maintenance.
- Insist on a small mock-up area and signoff before full installation so you can judge appearance and cleaning effort firsthand.
Procurement guidance recommends a detailed checklist so you do not miss critical acceptance criteria when purchasing anti-slip products.
Quick procurement checklist and next steps
Copy and paste this checklist into your RFP or supplier request to make quotes directly comparable.
- Project description: substrate, square footage, traffic type, contaminants, indoor/outdoor.
- System specified: base coat, broadcast or suspended additive, topcoat type and required gloss level.
- Product data sheet for each product, including batch or item numbers.
- Measured CoF for wet and dry conditions, test method named, and test report attached.
- Application rates, particle size range for aggregates, and recommended coverage in g/m2.
- Mock-up area size and acceptance criteria, including visual and CoF thresholds.
- Surface prep requirements and verification tests such as diamond grinding and moisture testing.
- Warranty terms and cleaning/maintenance restrictions.
- References for at least two similar projects within the past three years.
Next steps: arrange an on-site assessment to confirm substrate condition and get a project-specific recommendation and quotation that includes CoF targets and an approved mock-up.
Frequently asked questions
What is the difference between broadcast aggregates and suspended anti-slip additives?
Broadcast aggregates are coarse materials applied to a wet base coat then sealed. They create strong mechanical traction and long-lasting texture. Suspended additives are fine particles or beads mixed into a topcoat to create a subtler texture with less visual disruption. Choose broadcast aggregates for heavy wear and suspended additives when appearance is a priority.
Will an anti-slip additive ruin a metallic epoxy finish or change the colour?
Fine suspended additives are designed to be minimally visible and can be used with metallic finishes with only a small loss of gloss. Coarse aggregates will alter the appearance and reduce reflectivity. Always request a mock-up to confirm the visual outcome before full installation.
What slip-resistance information should I insist on when comparing quotes?
Insist on product data sheets, measured CoF values for wet and dry conditions, the named test method and lab report, and an in-situ mock-up measurement after application. Do not accept unverified or generic "slip resistant" claims without test data.
When should I delay adding an anti-slip additive because of substrate issues?
If you find contamination, active moisture, insufficient mechanical profile, or unrepairable cracks, delay the additive until the substrate is cleaned, ground, tested, and repaired. Additives rely on proper adhesion to the coating system.
How do maintenance and cleaning change after installing an anti-slip additive?
Textured finishes often need more frequent sweeping and periodic scrub cleaning to remove trapped grit and oil. Choose cleaning methods and chemicals recommended by the product manufacturer and record them in maintenance documentation provided at handover.
For a detailed contractor procurement checklist and guidance on inspection rules, CoF test methods, and visual contrast requirements, consult the Contractors' Anti-Slip Products procurement checklist.
JLN Epoxy provides free, no-obligation, on-site assessments across Toronto and the GTA and can recommend the best anti-slip additives for your project based on substrate condition and use case. Request a free on-site assessment to get a CoF recommendation and an approved mock-up.
