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The cracks or joints are enlarged by milling with a Klaruw router to a width of 15-20 mm and a depth of 10-20 mm. Following this, the groove is blasted dry and clean using Klaruw’s purpose designed SuperJet hot air lance. Immediately after this and while the horizontal and vertical bonding surfaces are still hot, the groove is filled with a flexible sealant, a high-grade filling compound. This is applied using a narrow screed box. Natural or artificial coloured crushed slate dust, heated chippings or calcined bauxite to choice is spread on the surface to complete the repair.



All types of cracks or joints in bituminous pavements with a maximum width of 10 mm where the surface is sound. Not suitable for cracks where considerable movements are anticipated or transverse cracks which penetrate as far as the base or sub-base.


Level and neat finish, band of consistent width; good penetration of an appropriate grade of flexible sealant accommodates thermal movements.


The treatment has been applied by us on frequent occasions since 1988 and has been proven in use.

Video; Road Maintenance Flex-Fill

hot air lance

Rapid, effective
drying & cleaning