Non-Yellowing Anti-Slip Coating

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Clear anti-slip coatings should provide AS 4586 compliance without changing the appearance of your floors. However, UV degradation research has shown that clear polyurethane coatings can develop visible yellowing discoloration within weeks of high exposure to sunlight.

The result of this is damaged aesthetics and additional maintenance costs. You spend more on repairing your floors, replacing them, or reapplying a premium clear anti-slip coating that doesn't fall apart in weeks. 

As a facility manager, choosing a non-yellowing anti-slip coating from the start is your best bet. In this article, we'll explore why yellowing occurs and how Stellmann's UV-resistant coating provides invisible protection that lasts for years.

Key Takeaways

• Anti-slip coatings make floors safer, but also cause discoloration
• Yellowing happens due to UV exposure, poor-quality coatings, or poor application technique
• A discoloured coating impacts brand appeal and increases maintenance costs
• Non-yellowing anti-slip coatings, like Stellmann's UV-resistant formula, provide clarity and slip safety

Why Most Clear Coatings Fail

Not all clear anti-slip coatings are chemically equal. So, let's look at the reasons most clear coatings break down and begin to turn yellow.

1. High UV Exposure

According to Sun Ray, Australia is one of the countries with the highest UV index in the world. And the thing about UV radiation is that it doesn't just affect skin — it also affects polymers.

UV rays penetrate the coating film, polymer chains begin to break down, and oxidation reactions occur. Over time, the surface gradually discolours through a process known as photodegradation, turning what was once clear or lightly amber into yellow.

Cheaper anti-slip coating products often lack adequate UV stabilisers, so they can begin to deteriorate within a few weeks in areas where sunlight isn't controlled.

2. Low-Quality Base Resins 

Many low-cost, clear anti-slip systems use aromatic polyurethane resins because they are cheaper to manufacture. The downside is that these polyurethanes are notorious for yellowing when exposed to sunlight.

It's important to note that aromatic polyurethane is prone to yellowing, while aliphatic polyurethane is UV-stable and colour-retentive. So, if a manufacturer does not specify UV-resistance, that's a red flag.

3. Epoxy-Based Formulations

Epoxy-based coatings are prone to UV degradation because of their chemical structure, so clear epoxies will gradually turn amber with long-term exposure to sunlight. Studies on the mechanism of yellowing have shown that, given enough time, epoxies will even yellow at room temperature and medium humidity, with or without light.

While epoxy-based coatings offer durability, they are not ideal for retaining the original colours of your floors.

4. Ongoing Oxidation

Even in shaded areas, oxygen slowly reacts with unstable coating components. This oxidation process alters the chemical structure, leading to darkening, uneven discolouration, and yellowing.

Internal shopping centres, corridors with skylights, and semi-outdoor spaces are especially vulnerable because they receive indirect UV exposure along with constant air circulation.

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5. Application Errors

A poorly applied coating is likely to discolour unevenly, creating noticeable patchy areas. You can cause and speed up yellowing by making the following mistakes:

• Incorrect mix ratios for dual-component coatings
• thin, overly thick, or uneven coating layer
• trapped contaminants under the coating
• inadequate curing

Research on the maintenance of metal coatings shows that by optimising the initial coating thickness, you can reduce coating failure by up to 25% and lower recoating costs by up to 6%. 

While these figures are specific to metal substrates, the principle applies to anti-slip coating systems as well. Doing it right the first time will extend performance and reduce the need for reapplications. 

The Business Impact of Yellowing

Here's how yellowing coatings impact your business: 

• Costly removal and reapplication
• Business disruption
• Tenant complaints
• Brand image damage
• Increased lifecycle cost

In regulated environments where hygiene and compliance with AS 4586 standards are mandatory, preserving aesthetics is essential. Even if your floors are slip-resistant, they may seem unhygienic if they appear yellowed. 

How Stellmann's Clear Anti-Slip Coating Stays Crystal Clear

At Stellmann, we've designed non-yellowing clear anti-slip coatings, and here's how:

1. UV-Resistant Formula

Yellowing and discoloration begin when UV radiation breaks down unstable polymer chains inside a coating.

Stellmann's clear anti-slip coating is designed with advanced UV stabilisers that absorb and neutralise ultraviolet exposure before it can damage the resin structure. We've tested our formula under harsh Australian sun conditions, and it maintains long-term transparency in real-world environments.

2. Premium Aliphatic Polyurethane  

The biggest difference between coatings that yellow and those that don't is the type of polyurethane used.

Stellmann uses premium aliphatic polyurethane that is UV-stable by design. Its chemical structure does not discolour when exposed to light, so our clear anti-slip coating remains crystal clear. 

3. Proprietary Non-Yellowing Technology

Apart from resin selection, we've developed our proprietary non-yellowing technology that keeps the coating clear for a really long time. To back up our claims, we offer a long-term product warranty on our clear anti-slip solutions. 

Stellmann's Technical Specifications

Specifications are important if you're a commercial facility manager. Here's an overview of how our coatings perform.

1. AS 4586 P4 / P5 Rating Capability

Stellmann's coating is designed to achieve P4 or P5 slip ratings under AS 4586, depending on the substrate and application method. This helps facilities meet compliance requirements while preserving the natural look of underlying surfaces.

2. UV Resistance Rating

Our coating is formulated with UV-stable polyurethane and advanced stabilisers suitable for high-exposure environments. Whether in sunlit interiors, entryways, or outdoor dining areas, it will resist yellowing.

3. Durability

When properly applied and maintained, Stellmann's coatings remain clear for years. Their resistance to UV degradation and oxidation reduces the need for frequent replacement, helping lower long-term costs.

4. Coverage Rate

Our clear non-slip coating provides approximately 13-14 m² coverage per kg, depending on surface porosity and substrate condition. You'll find it easy to plan materials for different projects, because our products are available in multiple sizes for areas of 5 m², 15 m², and up to 165 m².

5. Drying Time

The coating dries to the touch in 60 minutes and can take light foot traffic within 8-12 hours. This fast-curing time helps reduce operational disruption in commercial environments. 

Stellmann Case Studies and Real-World Results

Case Study 1

Anti-Slip Flooring at ANZ Bank, Melbourne

The Challenge

High foot traffic across bathrooms, corridors, and other areas created slip risks. ANZ required P3-rated protection that wouldn't change their premium flooring.

Our Solution

CSIRO-certified Stellmann Clear Non-Slip Coatings applied across multiple floor types to maximize traction.

The Result

• Compliant wet and high-traffic areas\
• Aesthetics preserved across stone, tile, timber, and vinyl
• Improved safety and reduced liability risk

Case Study 2

Safe Ceramic Tiles for ALDI Australia 

The Challenge

High-risk areas in the checkout and fresh produce zones didn't meet Australian slip-resistance standards, creating compliance and safety risks to customers and staff.

Our Solution

After trying various alternatives, ALDI applied the Stellmann Non-Slip Clear PRO (P3 Soft) to their ceramic tiles.

The Result

• AS 4586-2013 P3 (soft) slip rating achieved
• Invisible coating with no yellowing
• Easy ongoing maintenance and cleaning

FAQs

1. Does clear anti-slip coating turn yellow?

Some do, especially lower-quality formulations exposed to high sunlight and oxidation. We recommend our UV-resistant coatings that eliminate the risk of yellowing.

2. What causes anti-slip coating to yellow?

Typically, discoloration results from an inferior coating formulation. Other contributing factors include UV degradation, oxidation, wrong mix ratios, and poor application methods.

3. How do I remove yellowed anti-slip coating?

Removal depends on the coating type, but popular options include mechanical brushing, chemical stripping agents, and professional surface re-preparation. However, removal can be disruptive and costly.

Conclusion

According to SafeWork Australia, slips, trips, and falls are the second leading cause of workplace injuries. Slip resistance compliance is non-negotiable in commercial facilities, but safety shouldn't come at the expense of aesthetics. 

Yellowing often occurs with low-quality coatings designed for short-term performance. A true non-yellowing anti-slip coating like Stellmann's provides long-lasting protection while preserving the look of your floors and reducing maintenance costs.

Ready to upgrade your flooring safely and stylishly? Check out Stellmann's range of clear anti-slip coatings today.