Polyurethane sealant for seams
Joint sealants play an important role in construction and repair work. The durability of structures, protection against moisture penetration, cracking, freezing and corrosion processes depend on the quality of the sealing. An incorrectly selected or poorly applied sealant can lead to significant repair costs in the future.
Main types of seam sealants
The modern construction market offers several main types of sealants, each of which has its own characteristics and scope of application:
- Silicone sealants are elastic, moisture-resistant, but have limited adhesion to mineral substrates and cannot be painted.
- Acrylic sealants are suitable for interior work, environmentally friendly, but less elastic and not suitable for expansion joints.
- Polyurethane sealants are universal, durable, elastic, and suitable for interior and exterior work.
- Bitumen sealants are used mainly for roofing and waterproofing, and have a limited scope of use.
- Epoxy sealants are extremely strong, but rigid, and are used in special industrial environments.
Among the entire range, polyurethane joint sealants are considered the optimal solution for most construction tasks.
Advantages of polyurethane sealants
Polyurethane sealants are used to seal joints during interior and exterior work, including in areas with increased mechanical loads: expansion and compensation joints, joints of concrete panels, facade and roofing assemblies.
Main advantages: 
high elasticity and ability to compensate for deformations;
excellent adhesion to concrete, brick, metal, wood, PVC;
resistance to vibrations, mechanical damage;
resistance to temperature extremes, UV radiation and aggressive environments;
possibility of painting after hardening.
Professional choice: HYDROFLEX 40 FC polyurethane sealant
For reliable and durable joint sealing, PROTEX offers HYDROFLEX 40 FC , a one-component high-modulus polyurethane sealant that hardens under the influence of atmospheric moisture.
HYDROFLEX 40 FC provides strong adhesion to most building materials and maintains elasticity throughout its service life.
Features and benefits of HYDROFLEX 40 FC : 
rapid hardening;
high adhesion strength;
permanent elasticity without shrinkage;
thixotropic consistency (does not run off vertical surfaces);
does not absorb dirt;
easy to apply and smooth;
subject to painting.
Scope of application
Polyurethane sealant HYDROFLEX 40 FC is used for:
compensation and deformation joints between different structural materials;
sealing seams in facade and roofing systems;
sealing joints in ventilation ducts, gutters, and downspouts;
sealing sheet metal seams;
vibration reduction in installation work;
protection against the penetration of water, air, gas and dust.
HYDROFLEX 40 FC polyurethane sealant is a professional solution for sealing joints in modern construction. It combines high strength, elasticity and durability, providing reliable protection of structures in the most difficult operating conditions.
