PU Polyurea Technology

The Technology

Waterproofing technologies have been evolving for a few decades now until the latest Polyurethane / Polyurea technology which has met almost all the waterproofing technical requirements like; Adhesion to Surface,  Exposed Applications, Moisture Penetration resistance, No additional Loading to the structure, Crack Bridging,  Applicable on all surface profiles & shapes, Tensile Strength, Maximum life expectancy.

PU Technology revolution

The advantages of a liquid applied membrane like seamless layering, chemical bonding to substrates and any-shape profiling outdates the usage of preformed sheets in today’s technical suitability.

The Polyurethane waterproofing systems have proven to be superior to other modern and conventional waterproofing technologies because of its unique material characteristics which fulfills the most of waterproofing product requirements like high tensile strength in combination with high elongation to resist forces and movements associated with cracks of base concrete slabs.

Polyurethane liquid applied membranes has the excellent crack bridging and anti-root properties which makes it far superior to the commonly used elastomeric cementitious coatings in sunken areas and planter boxes.


ALCHIMICA is a pioneer in innovation and development of specialty polyurethane and polyurea based construction chemicals for Building Construction and Industrial applications. As a manufacturer and global supplier of polyurethane based products for more than 35 years ALCHIMICA has been the leader in developing specialised products & solutions, whose properties and performances are still unmatched by any other manufacturer.

The strong innovative tradition striving for new levels of excellence and constant investments in Research & Development, enables us to continuously introduce innovative technologies to the global market and as a result our engineered products solution to clients’ requirements are unrivalled.

For more information on Polyurethane based waterproofing products and its technologies, please contact ALCHIMICA TECHNICAL SERVICES at technical@alchimica.co.in

Polyurethane Technology

Polyurethanes are one of the most versatile polymers in the coatings formulations because of their low temperature and fast curing properties, their physical properties and their ease of application. The combination of resistance properties coupled with highly durable films makes this chemistry one of the most suitable technologies for waterproofing & protection of buildings and infrastructures.

A polyurethane, be it solvent- or water-based, has always been considered a premium coating system because of its Performance, appearance, great elastomer qualities, protection, cost-effectiveness and environmental compliance. Polyurethane coatings contain no or low VOCs and no CFs.

Among all the available waterproofing technologies, only Polyurethane based Waterproofing systems have all the required material characteristics with highest values;

Elongation, Tensile Strength, Bond Strength, Abrasion Resistance, Hardness, Temperature Reistance, Chemical Resistance, Hygiene and Longevity.

Polyurea Technology

Polyurea spray coatings technology is one of the new developments of the last 20 years. This technology combines fast curing, even at very low temperatures, and water insensitivity with exceptional mechanical properties, chemical resistance and durability. The development of new raw materials and improved spray equipment has made it possible to overcome the initial problems of this technology such as substrate wetting, intercoat adhesion and surface finish quality. Polyurea coatings are considered the premium coating option. Polyureas are more expensive than polyurethanes, but allow for significant processing and application advantages.

Hybrid Technology

The HYBRID coatings are those having a composition which is a combination of both Polyurethane/Polyurea coating systems. in other words the Hybrid coatings are a blend of polyurethanes and polyureas. The isocyanate component can be the same as for the “pure” polyurea systems. The resin blend is a blend of amine terminated and hydroxyl-terminated polymer resins and/or chain extenders. The resin blend may also contain additives, or non-primary components.

Hybrid systems have a larger scope of application conditions, but the presence of catalysts in hybrids makes them more sensitive to humidity than “pure” polyurea systems. Moreover, because the catalysed polyol/isocyanate reaction behaves differently from the amine/isocyanate reaction to changing application temperatures, the system becomes less robust. The most common uses are corrosion control and waterproofing applications.