Bond coats (also known as tack coats) are sprayed bituminous binders applied either to a primed granular substrate or a bituminous layer to promote adhesion between the existing surface and an asphalt layer being placed on it. Usually stable mix (anionic or cationic) bitumen emulsion is diluted 1:1 with water to achieve full coverage of the underlying layer with a thin residual bitumen film.

Quick set

Slow set

Hot applied elastomer modified (width of 5 – 15 mm):

Cold applied emulsion elastomer modified (width of 2 – 4 mm):

Spray seals:

• e.g. Sand/ Grit seals, Single stone seals (including single stone and sand blinding layer), Multiple stone seals (Double or Triple stone seals) and Graded aggregate seals e.g. Otta seals.

Combination seals:

• e.g. Cape Seals (Single stone seal with one or two layers of slurry) and Slurry-bound Macadam seals.

Cover spray

• Application of emulsion or diluted emulsion covering the aggregate and forming part of the initial seal design. A cationic spray grade emulsion is normally used for this purpose.

Fog spray or rejuvenation spray

• Application of anionic emulsion, diluted anionic emulsion or invert emulsion rejuvenator for purposes of adding additional binder to the seal or rejuvenating the seal at a later stage of the seal life.

Cold mixes use less energy and produce fewer emissions than hot mixes. Cold mix plants are lower cost, simpler and more mobile than hot mix plants and emulsion mixes lend themselves to on-site and in-place manufacture. The ability to stockpile material for future use leads to less waste and reworking than with hot mix.

Bitumen stabilisation normally entails the upgrading of the quality of readily available pavement materials by treatment with relatively low concentrations of bitumen (normally < 3% by mass). The use of stable mix grade enables proper mixing of the binder with dense graded materials with high fines content and extended workability periods for good dispersion.

LIESEN-Bitunaht is specifically used in hot mix asphalt applications as bonding agent in the longitudinal joint.  In “cold joint” situations optimum bonding is achieved between existing and newly laid hot mats. The LIESEN-Bitunaht provides maximum protection against parting or splitting of the joint.

• Bitunaht H: roads carrying low to medium volume traffic
• Bitunaht HP: heavily loaded roads

LIESEN-Bituplast L is a ready-to-use, cold applied and fast curing polymer-modified bitumen compound with fibre and mineral reinforcement. As a joint sealant LIESEN-Bituplast L is very pliable due to its adhesive and solvent–based constituent materials and therefore also fills pores and depressions. Once applied, the compound is almost immediately waterproof, even if it has not yet set completely. LIESEN-Bituplast L is particularly suitable for joints in asphalt surface layers (both longitudinal and transverse).

LIESEN-BITUREP: Rainy periods often signal the onset of road damage. To repair such damage we can offer you our cold-applied repair material – BITUREP-E (emulsion-based) and BITUREP-L (solvent-based) for smaller repair works.