Preliminary measure in determining dosages
The types of sealant and dosages recommended by the Producer based on the destination of use and the speed category must be respected.
How to determine FKR sealant dosages?
For determining dosages for FKR sealant you must identify:
- The type and size of the tyre marked on the side surface.
- The field of use, for which there are two dosage categories:
- Regular dosages (ON DRIVEWAY column – developed roads) for vehicles that operate in normal conditions.
- Severe conditions dosages (OUTSIDE DRIVEWAY column– undeveloped roads or exposure to multiple perforations) for vehicles that operate in extreme conditions.
The following situations can occur:
|No.||Field of use||Recommended dosages||Column in DOSAGES section|
|1||Mainly ON DRIVEWAY||Regular dosages|
|2||ON DRIVEWAY / OUTSIDE DRIVEWAY – Moderate frequency of flat occurence||Regular dosages||ON DRIVEWAY|
|3||ON DRIVEWAY / OUTSIDE DRIVEWAY – High frequency of flat occurence||Severe conditions dosages||OUTSIDE DRIVEWAY|
|4||Mainly OUTSIDE DRIVEWAY||Severe conditions dosages||OUTSIDE DRIVEWAY|
Why is it important to respect the recommended FKR dosages?
FKR sealant, by its rheological nature (thixotropic system), decreases its viscosity when the centrifugal speed (implicitly, the speed of the vehicle) and the temperature increase. In static and normal temperature conditions, FKR sealant returns to its initial viscosity. (This is why when you dismount a tyre that contains FKR sealant you won’t notice, in static conditions, the formation of a uniform film; these form only when the wheel is in motion.
If the recommended dosage is not respected, the following situations might occur:
- When the vehicle belongs to the small speed category ( < 50 km/h) but a high speed category sealant is inserted in the tyre (example: FKR03 instead of FKR04 or FKR02 instead of FKR03), the sealant, while the wheel is in motion, won’t have the necessary fluidity to uniformly distribute on the interior surface of the tyre and will solve a lesser number of flats than expected.
- When the vehicle belongs to a higher speed category (> 80 km/h or > 50 km/h), but a low speed category sealant is inserted in the tyre, vibrations could be experienced at high speeds.
Dosages on types of tyres and vehicle categories are contained in the Installation Manual offered by the Producer at delivery.