Tungsteno counterweight paste 10 g

Tungsten Paste for Precise and Uncompromising Ballasting

The tungsten paste counterweight SISP25 from Slot.it is one of the most versatile tools we can have on the preparation table. With 10 grams of material in paste format, it allows us to distribute the extra weight exactly where we need it: under the chassis, on the sides, at the front or rear, adapting to each car and each track without the limitations of rigid counterweights.

Main Features

• Material: tungsten, one of the densest metals available, allowing for a significant concentration of weight in a very small volume.
• Format: moldable paste, easy to apply and cut according to the needs of each preparation.
• Content: 10 grams per package.
• Official Slot.it Reference: SISP25.

Function and Performance

In the preparation of a competition slot car, ballasting is as important as the choice of motor or tyres. A well-calculated weight distribution improves traction on corner exits, reduces oversteer in turns, and stabilizes the front end in fast chicanes. Tungsten gives us a decisive advantage over traditional lead: being much denser, we can add significant weight in very confined spaces, without having to sacrifice gaps that we may need for other components.

The paste format is particularly practical for applications in areas of irregular geometry, where a machined tungsten piece would not fit without modifications. It adapts to the shape of the chassis, adheres well, and maintains its position during the race.

Compatibility and Recommended Applications

This counterweight is compatible with virtually any slot car chassis, regardless of scale or brand. Its use is common in preparations of cars with inline, sidewinder, or anglewinder configurations, as in each of these setups the centre of gravity and mass distribution have different implications on track behaviour.

It is especially useful when working with plastic or resin chassis where there is not enough space to insert conventional weights, or when we want to compensate for the weight of a lighter motor without modifying other parts of the car.

Assembly and Preparation

The application is straightforward: take the necessary amount, shape it with your fingers or a spatula, and place it in the desired area of the chassis. For permanent fixes, it can be combined with a small amount of adhesive. If we want to test before making a final fix, it is sufficient to adjust the weight provisionally and conduct several track test sessions before deciding on the optimal distribution.

We recommend working with small doses and a precision scale to monitor the total weight of the car at each stage of the process. A small excess can make a difference in categories with strict weight limits.

Ideal for…

• Preparers and competition drivers in clubs or championships looking to fine-tune ballasting with maximum precision.
• Enthusiasts who enjoy the technical preparation of their cars and want measurable results on track.
• Chassis with limited spaces where rigid counterweights do not fit without modifications.

Frequently Asked Questions

Is it easy to remove once applied?

In applications without additional adhesive, the paste can be removed relatively easily. If it has been fixed with glue, its removal will depend on the type of adhesive used. The most practical approach is to decide on the position well before making a final fix.

Can I use this counterweight in any scale?

Yes. Being a free format, it can be cut and adjusted to the necessary amount and shape for any scale, from 1/32 to 1/24 or other less common configurations.

How many grams should I add to my car?

It depends on the regulations of your category and the characteristics of the chassis. It is common in competition to work with precision scales to reach the minimum regulatory weight or to balance the distribution between axles. There is no universal figure: each preparation is different.

Is tungsten better than lead for ballasting?

Tungsten has a much higher density than lead, allowing for more mass to be concentrated in less space. This is a real advantage when the available space in the chassis is limited. For larger areas where volume is not an issue, both materials serve their purpose.

Does this product include adhesive?

No. The SISP25 is solely the paste counterweight. If you need to fix it permanently, you will need to use the adhesive you consider most suitable for your chassis.

The Slot.it SISP25 tungsten paste weight (10 g) is an essential tuning accessory for slot car preparation. Its moldable format allows precise ballast placement on any chassis, maximizing centre of gravity control and improving cornering stability. Compatible with all major slot car brands and scales, it is the go-to choice for club racers and serious enthusiasts looking to fine-tune weight distribution without the limitations of rigid counterweights.