Silicone 15000CPS SPECIAL DIFFERENTIALS

The right viscosity for your differential to work as it should

The differential is one of the most delicate components of any competition slot car. Its proper functioning largely depends on the lubricant that fills it: too light and the torque distribution becomes unpredictable; too thick and the differential loses its real effect, especially in corners. The Silicone 15000 CPS Special Differentials (MP012-15000) is formulated to provide that balance point that the most demanding tuners seek.

Function and performance

With a viscosity of 15000 CPS (centipoise), this silicone is positioned in the mid-high range, making it a very versatile choice for ball differentials, viscosity differentials, or planetary types. It provides:

• A smooth and progressive torque distribution between the rear wheels.
• Greater stability when accelerating from the apex of the corner, reducing sudden oversteer.
• Protection of the internal components of the differential against wear.
• Chemical stability: it does not attack plastics or seals of the differential.
• Low evaporation rate, which extends the maintenance interval.

Which viscosity to choose?

The choice of differential silicone viscosity is one of the most influential tuning variables in the car's behaviour. As a general reference:

• Low viscosities (1,000–5,000 CPS): very free differential, ideal for fast tracks with few slow corners.
• Medium viscosities (7,000–15,000 CPS): balance between traction and wheel freedom. The 15000 CPS is at the upper end of this range, providing more controlled locking and better exit traction.
• High viscosities (30,000 CPS and above): very locked differential, approaching the behaviour of a solid axle.

The 15000 CPS is particularly valued on technical tracks with chicanes and medium radius corners, where the car needs to rotate precisely without losing traction on exit.

Compatibility and application

This silicone is suitable for differentials from the main manufacturers in the slot market: NSR, Slot.it, Scaleauto, Avant Slot and others. It is applied directly inside the differential during assembly or maintenance. No dilution or prior preparation is required.

For application, we recommend using a fine-tipped syringe or the appropriate dispenser, so that the deposited amount is precise and uniform. An excess of silicone can reduce the effectiveness of the differential and dirty the interior of the chassis.

Usage and maintenance recommendations

• Thoroughly clean the differential before applying new silicone, removing any remnants of old lubricant or dirt.
• Apply the right amount: a few well-distributed drops are sufficient for most ball differentials.
• After assembly, run the car at low speed for a few minutes to ensure the silicone is evenly distributed.
• Periodically check the condition of the differential, especially after long competition sessions.

Frequently asked questions

Can I use this silicone in viscosity differentials (like Slot.it)?

Yes. It is compatible with viscosity differentials, where the fluidity and chemical stability of the silicone are crucial for proper functioning.

What is the difference between a 7000 CPS silicone and this 15000 CPS for the differential?

The 15000 CPS offers greater resistance to free wheel rotation, resulting in more exit traction in corners and a more stable behaviour, although slightly less free than with lower viscosities. It is a good choice for technical tracks or drivers who prefer a more predictable car.

Is it compatible with all plastics in the differential?

The silicone is chemically inert to most technical plastics used in the manufacture of slot differentials. However, if the differential manufacturer recommends a specific silicone, it is advisable to follow that indication.

How often should I renew the silicone in the differential?

It depends on usage. In regular competition, a check every few race days is prudent. In recreational use, the interval can be much longer. The low evaporation of this silicone helps to prolong maintenance.

Can it be mixed with silicone of different viscosity to adjust the hardness point?

Technically, it is possible to mix silicones of different viscosities to achieve an intermediate point, although it is always preferable to use the exact viscosity that best suits your driving style and track. Experimenting with mixtures is part of the advanced tuning process.

The MP012-15000 silicone fluid is a 15000 CPS differential oil specially formulated for slot car differentials. It provides smooth and progressive torque distribution, protecting internal components while improving cornering traction and overall car stability. Compatible with ball differentials and viscosity differentials from leading brands such as NSR, Slot.it, Scaleauto and Avant Slot. An essential tuning product for club racers and serious hobbyists seeking precise setup control.