Construction adhesive is a usually general-purpose adhesive used for attaching drywall, tile, molding, and fixtures to walls, ceilings, and floors. It is most commonly available in tubes intended for use with a caulking gun.
There are multiple chemistry for construction adhesives. Different manufacturers use different recipes, but common ingredients include clay, cement, acrylic resin, polyurethane monomers, styrene-butadiene rubber, hexane and other non-polar solvents, and various initiators and functional additives.
Polyurethane adhesives bond a major variety of surfaces. They bond to textile fibers, metals, plastics, glass, sand, ceramics, rubber, and more importantly wood.
Polyurethane is a multipurpose glue that comes in one part and two part options.
Polyurethanes can work very well on a wide variety of wood species, particularly on woods with high moisture content or on oily woods, where other glues are not as successful. Clamping is required until strength is built; a few hours. Full strength is achieved in six to eight hours usually for a very strong and tough bond.
Before completely cured, polyurethane adhesives can be removed using solvents such as mineral spirits or acetone. Dried glue can also be easily sanded.
Final curing might take up to 48 hours, depending on the ambient temperature, but drying (setting) time takes up to 2 hours only.
Today, with new technologies and extremely special raw materials, Polyurethane adhesives can be used in types and types of applications, including:
- Carpet Laying
- Ceramic Tile
- Plaster boards (Dry walls)
- Countertop Lamination
- Flooring Underlayment
- Drywall Lamination
- Heating, Ventilation, Air Conditioning
- Pre-finished Panels
- Resilient Flooring
- Wall Covering
Today, architectural masterpieces or multi-story apartment houses are made from timber which is glued together, and is also a renewable building material. Thanks to latest adhesive technology, this is the most sustainable and the safest way to build a house.
Australia, NZ, Scandinavia and the USA have a history of timber buildings and now, the Germans have started building houses using timber. Today every fifth house is constructed from timber, which has made many other materials completely superfluous. Even load-bearing structures are made from wood or, more precisely, wood plus an adhesive, a composite of various layers of timber which are glued together under pressure. The result is an absolutely stable element of any length and thickness. Curved components can also be manufactured by laminating wood with a suitable adhesive.
A single-component polyurethane adhesive allows for adhesive bonds which are environmentally safe and not harmful to health. The special adhesive reacts with the moisture contained in the wood.
Adhesives in Flooring
Sometimes in high heels, sometimes with rugged boots or other heavy foot-wear, people walk, run, trip over or jump on flooring coverings. Of course, the adhesive underneath the floor surface has to endure these loads as well.
These surfaces are subject to a permanent load, particularly in public buildings. That said, quality is not a luxury but of the essence. Rubber coatings in airports and railway stations have to resist loads comparable to several herds of hippos, elephants and rhinos crossing.
In residential buildings, carpet, laminate, cork and adhesives are exposed to less harsh conditions. But at the end of the day, flooring adhesives need to be flexible after curing, too.
Polyurethane glues are also one of the best options for carpets, vinyls, ceramic tiles, and most types of floor coverings.