Comparison of current waterproof materials

Concrete is a versatile building material and is very popular. It is highly durable, but cannot withstand exposure to moisture. The concrete surface is porous and when exposed to long moisture, the concrete structure begins to deteriorate over time.

The waterproofing layer is the optimal solution to maintain the integrity and prolong the life of buildings and concrete products. Often concrete waterproofing is a necessary measure under high humidity and direct contact with water: waterproofing of roofs, waterproofing of foundations; Basement; pool; floors, etc…

Waterproofing material is one of the indispensable effective solutions to bring high efficiency to projects over time. Currently there are many types of waterproof materials from long-standing materials such as polymer cement or membrane types, with new polyurethane materials or advanced polyurea-based materials. What are the advantages and shortcomings of each type, let’s find out the information through the comparison of waterproofing materials below.


Polyurea Coating – Polyurethane Coating – Original Cement Polymers,Bitumen 

Main factorsPolyurea Coating Polyurethane Coating Original Cement Polymers,Bitumen
Resistance to mechanical damagehighhighlow
Resistance to temperature changeshighhighlow
General strengthhigh averagemedium
Surface adhesionhigh highaverage
Installation speedhigh mediumaverage
Requires foundation preparation high high average
Vapor permeabilitygood good low
Color spectrumwide limit Not available
Service life, yearsover twenty yearsless than ten yearsless than five years
Waterproofing cost per 1m²from 500.000vnđfrom 350.000vnđfrom 200.000vnđ
Cost dependence on the complexity of the surfacelow
significantly increased

significantly increased
The cost dependence on the construction areaSignificant increase (small area, high price, if the area is too small, it will be difficult to deploy)
low

low

WATERPROOFING BY POLYUREA

Polyurea application is a modern technology which is very popular with experts in the world. This method deserves special attention, because it is the most effective and beneficial in most cases requiring reliable protection and waterproofing of concrete surfaces.

Polyureas are formed by mixing two ingredients. The material is applied by two-component drying and a special high-pressure spray. Mixing of components takes place directly in the spray gun chamber during construction. Polyureas harden very quickly and form a monolithic and uniform protective layer. It is an elastic and durable coating that has a high adhesion rate on all surfaces. Polyurea waterproof concrete is a reliable protection against moisture and destruction. What is Polyurea ?

Sewer pipes for wastewater from To Lich River to Yen Xa wastewater treatment project

MAIN BENEFITS OF POLYUREA:

  • Seamless coating without seams and joints
  • The coating is elastic and very durable, with high wear resistance
  • Fast curing time (coating can continue for 1 minute after application)
  • High working speed
  • Durability (over 20 years)
  • Environmentally friendly of polyurea (free from harmful solvents and impurities)

RECOMMENDATIONS TO APPLY POLYUREA TO CONCRETE

For high-quality polyurea coatings, attention should be paid to the preparation of the insulating surface. Concrete surface is free of dirt and oil stains. Major defects are removed and smoothed. The concrete floor is dried, if necessary (allowable humidity does not exceed 8%). Dry and clean surfaces are coated with a primer to close pores and improve polyurea adhesion. This operation is required for all porous surfaces (concrete, cement, plaster, bricks). After the primer has dried, a layer of polyurea of the required thickness is applied. In practice, it has been determined that a layer of polyurea with a thickness of at least 1.5mm is the optimal solution for waterproofing concrete surfaces.

Construction image Polyurea EPL-550 in Korea

POLYUREA CONSUMPTION

Polyurea manufacturers usually indicate polyurea consumption in the order of 1.1 kg / 1 square meter. with a coating thickness of 1 mm. Those, that. To apply a 2 mm waterproof polyurea layer, approximately 2.2 kg is required. material. It should be noted that such consumption is possible under laboratory conditions. In practice, the consumption is about 2.4 kg / 1m2, with a waterproof layer thickness of 2 mm.

ADVANTAGES OF POLYUREA

Disadvantages include the fact that polyurea coatings cannot be applied without special equipment and a technically trained professionally in Polyurea technology.

Photos of polyurea construction machinery at the construction site

One thought on “Comparison of current waterproof materials

Trả lời

Email của bạn sẽ không được hiển thị công khai. Các trường bắt buộc được đánh dấu *