Silicone 700CPS

Silicone 700CPS: viscosity control for tyres and slot mechanics

Silicone 700CPS (reference MP010-700) is a medium-viscosity silicone oil that has become a common resource in slot car preparation benches. Its viscosity index of 700 centipoise places it at an intermediate point between the more fluid and denser silicones, making it particularly versatile for both tyre treatment and controlled lubrication of plastic and rubber mechanisms.

Main features

• Viscosity 700CPS: midpoint of the technical silicone spectrum; neither too liquid nor excessively dense.
• Action on tyres: modifies the surface hardness of silicone and urethane tyres, directly influencing grip on the track.
• Compatibility with plastics and rubbers: does not attack the polymers commonly found in chassis, guides, and body parts.
• No corrosive residues: does not leave deposits that could degrade components in the medium term.
• Controlled application: its texture allows for precise dosing, avoiding excesses that could affect performance.

Applications and use in slot

In the world of slot, silicone is primarily used to soften or condition tyres, allowing the compound to better adapt its behaviour to the temperature and type of track. A viscosity of 700CPS allows for a more gradual treatment than the more fluid variants (100–300CPS), offering greater control over the final result without compromising the tyre structure.

It is also useful for lightly lubricating shafts, plastic bearings, guides, and articulated body parts, where a mineral lubricant could be aggressive. In these applications, silicone acts as a protective barrier without generating additional friction.

Use in static modelling and figures

Beyond slot, technical silicones have applications in static models and dioramas: they facilitate demoulding in casting processes, protect rubber parts from shrinking, and can be used to create water effects or shiny surfaces in dioramas when combined with other specific products.

Usage recommendations

• Apply with a fine brush or cotton swab to control the amount deposited on the tyre.
• Allow to rest for the necessary time before running: silicone needs to penetrate the compound to act.
• Conduct progressive tests: the effect of silicone on grip varies depending on the type of tyre and the track.
• Store the product away from direct sunlight and extreme temperatures to maintain stable viscosity.
• Avoid contact with braids and track rails: silicone can reduce electrical conductivity.

Why 700CPS and not another viscosity?

The choice of the correct viscosity depends on the desired effect and the type of tyre. Low-viscosity silicones (100–300CPS) penetrate more quickly but offer less control. High-viscosity silicones (1,000CPS or more) act more superficially and prolonged. The 700CPS balances both extremes: it penetrates enough to modify the compound, but without saturating it, allowing for finer adjustments during preparation.

Frequently asked questions

What is the difference between silicone 700CPS and other lower viscosities?

Lower viscosity silicones, such as 100 or 300CPS, are more fluid and penetrate the tyre faster, with a more immediate and pronounced softening effect. The 700CPS acts more gradually and controlled, ideal when seeking fine adjustments to grip without the risk of excessively softening the compound.

Can it be applied directly to the tyre mounted on the car?

Yes, although it is preferable to remove the tyre from the axle to apply the silicone evenly across the entire surface. If applied with the tyre mounted, take special care not to contaminate the rails or braids.

Does it affect all types of tyres equally?

No. Silicone and urethane tyres react differently. Silicone tyres tend to absorb the treatment better, while urethane tyres may show slower changes. It is advisable to always conduct preliminary tests with a spare tyre before treating competition tyres.

Can it be used to lubricate shafts and bearings?

Yes, in applications where aggressive mineral oils with plastic are to be avoided. It provides smooth and protective lubrication, although for high-demand bearings, specific technical oils of lower viscosity may be required.

Is it compatible with UNIVERSAL track (Scalextric, Ninco) and SPORT track (Scaleauto, Slot.it)?

The product itself is compatible with any system. The important thing is not to contaminate the conductive rails with silicone, regardless of the type of track you use.

Does it have an expiration date or degrade over time?

Technical silicones are stable if stored correctly, away from heat and direct light. They do not have a strict expiration date, but it is advisable to check their texture before each use to ensure that the viscosity has not changed.

Silicone 700CPS (MP010-700) is a medium-viscosity silicone oil widely used in slot car preparation for tyre treatment, plastic lubrication and component protection. Its 700 centipoise rating makes it a versatile choice for hobbyists seeking precise grip adjustment on silicone and urethane tyres, compatible with all major slot car systems including Scalextric, Ninco, Scaleauto and Slot.it tracks. A staple product for club racers and bench technicians alike.