Silicone 4500CPS

Silicone 4500CPS: tyre treatment for solid and controlled grip

The Silicone 4500CPS (ref. MP010-4500) is a tyre treatment product for slot cars formulated with a viscosity of 4500 centipoise (CPS), placing it in the high-density range of track silicones. This level of viscosity translates into a denser layer on the tread, increasing the grip coefficient and reducing sliding in corners, especially on plastic tracks.

What does 4500CPS mean and why does it matter?

Viscosity in centipoise (CPS) is the measure that indicates the density or "thickness" of the liquid. The higher the CPS value, the denser the silicone and greater the grip effect it transfers to the tyre. A 4500CPS silicone is not for daily application or in large quantities: it acts decisively and its effects last longer compared to low or medium viscosity silicones.

• Low viscosity (e.g. 100-500CPS): penetrates quickly, quick effect but more fleeting.
• Medium viscosity (e.g. 1000-2000CPS): balance between penetration and durability.
• High viscosity (4500CPS): dense layer, intense and lasting grip, ideal for demanding tracks or harder tyres.

Recommended applications

This type of silicone is particularly useful in the following contexts:

• Hard or semi-hard rubber tyres that require more intensive treatment to reach their optimal grip point.
• Plastic tracks (Scalextric, Ninco, Carrera) where the surface offers less natural adhesion.
• Long practice sessions or club competitions, where it is important for the treatment effect to last as many laps as possible.
• Preparers and club drivers who adjust the car's behaviour by modifying the rear or front grip level differently.

How to apply it correctly

Given its high viscosity level, correct application is key to achieving the expected result without overloading the tyre:

1. Clean the tyre beforehand with a dry cloth or IPA (isopropyl alcohol) to remove dirt or residues from previous treatments.
2. Apply a small amount —one or two drops— onto the tread.
3. Distribute evenly with your finger or a lint-free cloth.
4. Let it rest for 5 to 15 minutes before running, so the silicone penetrates the rubber.
5. Perform a few warm-up laps before pushing the tyre to its limits.

Less is more: with a 4500CPS silicone, excess can create excessive grip that makes the car difficult to control or stains the track. Always start with conservative doses.

Points to consider

• Not suitable for soft urethane tyres without prior testing: it can alter the tyre geometry if applied excessively.
• If the track is wooden or cork, the effect may differ from that obtained on plastic.
• The effect varies depending on the tyre compound: experiment with small doses before using in official competition.
• Store it in a cool place away from direct sunlight to maintain its properties over time.

Frequently asked questions

How does silicone 4500CPS differ from lower viscosity silicones?

The main difference lies in the product's density. A 4500CPS silicone forms a thicker layer on the tyre, resulting in more grip and longer-lasting effects. Lower viscosity silicones penetrate faster but their effect wears off sooner.

Can I use it on any type of slot tyre?

It is compatible with most rubber tyres, although with very soft tyres, it is advisable to dose carefully. For soft urethane tyres, always perform a test with a small amount before applying in competition.

How long does the effect last on track?

As a high-viscosity silicone, the effect lasts longer than low-density silicones. The exact duration depends on the number of laps, track temperature, and tyre type, but generally, it remains active during long sessions.

Does it stain the track if I use too much?

Yes. An excess of any silicone, especially one with high viscosity like this, can leave residues on the track that affect all cars. Always apply the minimum necessary amount and remove any excess from the tyre before running.

Can it be mixed with lower viscosity silicones?

Technically yes, but it complicates controlling the result. It is most advisable to work with one viscosity at a time and adjust the dose based on the behaviour you observe on track.

Is it valid for both recreational use and club competition?

Absolutely. In fact, the high viscosity profile makes it particularly interesting for club drivers seeking consistent grip throughout the race, without needing to re-treat the tyre between runs.

The Silicone 4500CPS (ref. MP010-4500) is a high-viscosity silicone tyre treatment designed for slot car racing. With a density of 4500 centipoise, it delivers a thick, long-lasting grip layer ideal for hard or semi-hard rubber tyres on plastic slot car tracks. Suitable for both recreational use and club-level competition, this product is a reliable choice for slot car enthusiasts looking to improve traction and lap consistency. Available at Ministry of Hobby, your specialist in slot, scale models, diecast and high-end collectibles.