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Hertec- 100% solid Polyurea Systemreihen

Abundant applications for polyurea coating system   The main function of a roof is to keep out the wet. All the same, leaks and penetrating moisture are by no means uncommon especially on flat roofs. The plastic (PVC)- and bitumen-based membranes conventionally used are susceptible at the joints, particularly where complicated roof geometries are involved. Such membranes can additionally become brittle at low temperatures and no longer bridge concrete cracks sufficiently. For such applications the company Hercules has its Hertec 100% solid polyurea coating systems that gives roofs jointless waterproofing and has been attracting increasing interest. The polyurea protective coating is sprayed on and reacts to form a continuous membrane devoid of seams and joints.

Sticks to almost any substrate and is easy to process

Hertec's  from Hercules has been on the market for several years. Its first classic application was for the sealing of the cargo beds of pick-up trucks in the USA. The surfaces were sprayed with Polyurea's or at that time with Hybrids and were then watertight and dirt-repellent. All the same,  Hertec has a good deal more to offer and is therefore constantly conquering new fields of application. It can be used on different substrate materials such as concrete, metal, wood and plastic. With spray application, its processing could not be more straightforward. The 1 to 1 mixing ratio of the two reactive components is simple and ideal for construction site conditions.

Furthermore, the material has a variety of properties. It features high processing tolerance at low outdoor temperatures and high humidity and the ability to bridge concrete cracks up to ten millimeters across. On top of this, it shows exceptional mechanical strength, chemical resistance, ageing resistance and high adhesion.


For industrial surfaces and imposing structures

In the meantime, the coating system has found a whole series of new applications. In the construction sector, the Hercules- Hertec 100%solid polyurea systems are used for coating concrete surfaces. Damaged seals allow moisture to penetrate into the roof, which can have disastrous consequences. These can include concrete degradation, long-term weakening of the building’s structural strength and downstream damage in interiors through to the proliferation of mold. Hertec  is the reliable antidote to such scenarios. As a liquid film, the coating system wraps itself around even the most complex geometries such as roof edges, skylights and air conditioning shafts and also seals vertical surfaces without seams or joints. Thanks to its rapid hardening, even at temperatures close to zero, sealed surfaces are load-bearing after only an hour. Large industrial surfaces of new or modernized buildings can be quickly, efficiently and lastingly waterproofed by spraying.


Imposing application examples can be found in Austria:  Unique building geometrics, as well  different floors in the industry, zoos, parking garages / parking decks, etc. as well as flat roofs, different wooden structures, facades, etc., etc. were sprayed with the Hertec polyurea systems. Even under extreme weather conditions the  Hertec polyurea systems stay against,  projects are stable and durable.


Protection for car park floors and secondary containments

This applies particularly to multi-storey car parks, which are usually concrete and steel structures. It is important that the uppermost, usually uncovered floor is given protection from penetrating moisture so that it remains serviceable for decades. Otherwise, concrete degradation could dangerously weaken the building and shorten its service life. This is where Hertec provides a long-term remedy, as the coat also effortlessly withstands the high stressing from car traffic. 


At petrol stations, car wash stations, full-scale protection of the environment also calls for special measures. It is very important here that fuels and lubricants do not seep into the ground. Experience has shown that the main causes of contaminants penetrating into the soil are damage to the elastic joint sealant and cracks in the concrete slabs. For such cases, Hercules has developed a multi-layer system. On the carefully prepared ground, a two-millimeter thick film of Hertec is sprayed. This is in turn sealed by an aliphatic Hertec top coat that is highly resistant to fuels.


Secures loads and stops concrete degradation

Hertec's have yet another positive feature, in that it displays anti-slip properties on the load beds of trucks. Additional transport securing, which would otherwise be necessary by law, is therefore unnecessary. The reason for this is Hertec's high static friction that prevents piece goods from slipping during transport. The higher this static friction, the less necessary it is to secure pallets or drums to prevent them from slipping. This saves time and money. Truck and semitrailer manufacturers are already successfully using this system. Bio gas installations and waste water shafts pose special difficulties. This is where biogenic sulfuric acid formed by special bacteria (thiobacillus) can very quickly cause considerable concrete degradation. The surface develops cracks and becomes permeable. Hertec puts an end to acid aggression with a seamlessly sprayed barrier layer.


Stronger than steel

In ore, gold and diamond mines and in quarries, steel surfaces are exposed to impacts and abrasion from bulk materials. Hertec coatings cushion the impact of the materials on the surface and protect it from destruction – thanks also to its high resistance to tear propagation and good abrasion values. In this way, a plastic coating is capable of even protecting steel, prolonging its useful life, boosting productivity and reducing maintenance costs. The Hercules system is already used in this direction.


The polyurea system has been awarded important approvals and certifications, and more are on the way. Hercules offers its customers comprehensive advice on correct processing so that the wide range of customer sectors can readily exploit the advantages of this versatile material for sealing joints and cracks. Hercules was one of the first companies in Europe which started in the late 90's working in the field of polyurea !


Hubert Tomz  (CEO Hercules Gmbh.)