Author: Site Editor Publish Time: 2025-01-08 Origin: Site
Increasingly, polyurethane sealants (also called PU glue) are emerging as a sustainable and economical solution in various segments of industry and civil construction.
The versatility and high adhesion and fixing capacity make PU glue an alternative with excellent cost-benefit. Today, these polyurethane sealants are found in automobiles, construction, machinery and equipment, furniture and residential installations, among others.
In the furniture industry, its main advantage over more traditional wood glues is its water resistance.
Its use is also widespread in the automotive segment for the assembly of front and rear car windows.
Polyurethane sealants (PU adhesives) have permanent elasticity and high recovery capacity, absorbing impacts and resisting aging and the effects of the elements.
These PU adhesives also resist the action of other chemical substances well, which guarantees their durability. They are non-corrosive and have low VOC emissions.
Curing is fast, favoring mechanical assemblies, making the joints waterproof with much more durability and efficiency.
The application of polyurethane sealants is vast due to their versatility, durability and efficiency in adhering joints on the most varied surfaces.
In welding of metal panels and plates, pre-molded panels and all types of industrial assembly joining rigid and flexible parts.
They provide complete sealing of joints in industrial parts. Also used in counters and cold rooms.
Due to its excellent adhesion to metals such as: iron, stainless steel, parts with galvanic treatments, aluminum and others, it allows use in the assembly and repairs of automobiles and vehicles in general.
They are also found in the trunks of refrigerated trucks.
PU sealants adhere well to concrete, brick, tiles, natural and synthetic stones, tiles, ceramics, enameled surfaces, hardwoods, glass and other components used in civil construction.
For indoor use, PU adhesives are used to assemble wooden frames, stairs, windows and doors, and to bond plasterboard and other porous materials.
Polyurethane sealants can be applied with a hand or pneumatic gun.
The application temperature must be between +5°C and +35°C. It is recommended to carry out compatibility tests on each material.
The surface must be clean, dry, free of dust, grease, loose particles and other substances that prevent good adhesion.
Remains of paint and poorly adhered coatings must be removed. When using solvent for cleaning, check its compatibility with the substrate. If necessary, apply primer.
For use on concrete, stone and other masonry, surfaces should be cleaned by sanding or wire brushing until a firm surface is exposed.
For application on metals, they must be free of scale, rust and coatings.
