Road Construction Materials


BORNIT® Crack Flex

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short info

BORNIT® Crack Flex
Highly flexible, plastic-modified bitumen compound with special filling materials for repairing cracks in road surfaces, weatherproof, UV-resistant and solvent-free. After drying, elastic, crackbridging and strongly adhesive to substrate. Applied with hand applicator or by machine with the special application tool “BORNIT® Rissomat”.

Color: black

4 017228 006819
4 017228 006802
12 kg
30 kg
Depending on dimension of crack
BORNIT® Crack Flex 30kg

detailed information

Areas of application
BORNIT® Crack Flex is applied cold and used for continuous repair of asphalt traffic areas, in order to prolong their service life at low personnel expenses and costs. BORNIT® Crack Flex® penetrates well into cracks with a width of more than 2 mm, and after drying forms an elastic sealing compound for longitudinal and transverse cracks in asphalt surfaces. Narrower cracks are flexibly and crack-bridgingly covered with the viscous material. The material is applied either manually with the BORNIT® Hand Applicator or using the processing equipment BORNIT® Flexomat 3.1 with the “Crack Module SpeedUp” attached for machine application.

Type and properties
BORNIT® Crack Flex is a highly flexible, polymer-modified bitumen emulsion with special fillers for repairing cracks in asphalt road surfaces. Once set, the material is weather-proof and UV-resistant. After thorough drying, the solvent-free product forms a resilient and elastic crack bridge against penetrating surface water. BORNIT® Crack Flex is particularly adhesive to the substrate and after drying, in connection with the chippings, results in a high-grip surface of the repaired areas.

Product advantages
• Highly elastic, crack-bridging and good adhesion to the substrate
• Cold workable and manufactured ready for use
• After drying, high grip of the repaired asphalt areas
• Solvent-free, hence environmentally friendly

The substrate must be firm, clean (if necessary, clean cracks with compressed air in advance) and free from separating substances (oil, grease, dust, etc.). It may be matt moist, but not wet. Properly repair larger defects in advance with BORNIT® Repair Mortar or BORNIT® Reactive Asphalt.

In principle, crack repairs should be performed at temperatures above +10 °C and in continuously dry weather (at least in the subsequent 6 hours).

Manual processing
Prior to manual application, BORNIT® Crack Flex must be stirred up well mechanically with a slow-running agitator. Then the compound is uniformly applied along the crack with the BORNIT® Hand Applicator (if necessary, several layers are applied to work the material well into the crack). Directly afterwards, generously spread dry high-quality 1/3 chippings on the treated surfaces. Depending on the weather and sufficient covering with chippings, the thus treated crack areas are load-resistant after 1-2 hours. Further drying and follow-up compaction take place under normal road traffic. Continuously dry weather of at least 12 hours must be observed
Note: Complete drying of the material may take longer than one day and depends on the weather and the crack width-dependent material quantity. During this period, driving on the repaired areas can result in excess material exiting moist at the surface, which, however, does not affect the final properties. Driving over freshly repaired areas should take place at a limited speed only, if possible, and with a warning concerning the loose chippings.

Machine processing
With the processing equipment BORNIT® Flexomat 3.1 with the BORNIT® Crack Module SpeedUp attached, longer cracks or larger distances (e.g. cracks in the centre seam) can be treated with BORNIT® Crack Flex® very quickly and effectively. With a hand-operated application lance (a combination of spraying nozzle and an accelerator spray nozzle), the material is thus liquefied under pressure and inserted deeper into the crack than with the hand applicator. Simultaneously, the material is uniformly applied in the required layer thickness at the surface, before chippings are spread on top. A uniform and visually clean surface of the repaired areas is achieved by using a spreader cart (BORNIT® Streufix 2.0), using which the high-quality 1/3 high-grade chippings are optimally applied in the right quantity. By using the reaction component BORNIT® SpeedUp an accelerated drying is effected. By the combination of two separate spray nozzles during the application, an additional, prior mixing of the two components or the use of a mixing nozzle is not necessary. An additional cleaning effort is thus avoided. The crack areas treated in this way are passable after a few minutes. Please obtain detailed documentation for the processing equipment separately.

Important note
The causes for cracks in asphalt are normally stresses and forces caused by most different influencing factors (e.g. insufficient load-bearing capacity of the foundation, defects during asphalting, etc.). Following an object-dependent service life of the repaired areas, cracks may therefore occur again and thus make repeated treatment with BORNIT® Crack Flex necessary. Permanent repair of these damaged areas is only possible by eliminating the causes. A more durable repair of cracks is possible by proper milling out and subsequent filling with suitable hot sealing compounds (e.g. BORNIT® Hot Sealing TL). Crack Flex does not adhere to old substrates with hot sealings.

BORNIT® Crack Flex: Approx. 0.2 kg / linear metre, depending on crack size, volume and method of application
BORNIT® SpeedUp: Approx. 0.016 kg / linear metre (Corresponds to the amount of approx. 8% BORNIT® Crack Flex)

Product data in brief
Type Plastic-modified bitumen emulsion
Base Rubber-latex, bitumen emulsion
Solvent None
Colour Black
Density Approx. 1.20 g/cm³
Consistency Viscous, thixotropic
Application Hand Applicator, BORNIT® Flexomat 3.1 + BORNIT® Crack Module SpeedUp
Processing temperature (surroundings and substrate) From +10 °C to max. +35 °C
Storage At moderate temperatures, not below +5 °C, sensitive to frost
Storage life In sealed original containers 6 months
Cleaning In the fresh state with water, in the hardened state with BORNIT® MultiClean
Diluent Water
Substances hazardous to health in terms of the ordinance on hazardous materials None
Hazard class according to VbF and ADR None
GISBAU product code BBP 10

System products
BORNIT®  Hand applicator
BORNIT® Flexomat 3.1
BORNIT® Crack Modul SpeedUp
BORNIT® Streufix 2.0

In originally sealed containers storable for 6 months. Protect from frost!

Health and fire protection, occupational safety
For information on handling, safety and ecology, please refer to the current safety datasheet.

Forms of delivery
Crack Flex    12 kg    bucket        45 buckets per pallet
                       30 kg    bucket        18 buckets per pallet
SpeedUp     25 kg    bucket        18 buckets per pallet

Note on disposal
BORNIT® Crack® Flex :
Only recycle completely empty containers. Material residues can be disposed of according to AVV-ASN: 080410 (adhesive and sealing compound residues, except for those falling under 080409).
BORNIT® SpeedUp:
Only recycle completely empty containers. Material residues can be disposed of according to AVV-ASN: 060205 (other bases).

This datasheet replaces any previous technical information about the product. Thus, this information is no longer valid. The details have been compiled according to the latest state of application technology. Please observe, however, that, depending on the state of the construction object, deviations from the method of application suggested in the datasheet may be required. Unless agreed otherwise in individual contracts, any information contained in the datasheet shall be non-binding and thus does not represent an agreed product constitution. We reserve the right to changes in the information contained in this datasheet anytime.


Stock Note


Necessary information – particularly for the use and the use of our products – please refer our brochures. We are at your personal disposal.