Aluminium, stainless steel, zinc, copper, brass, bronze
Metal is a term used to describe chemical elements that are characterized by high brightness (reflectivity) and good thermal and electrical conductivity. Metals have crystalline structures, feature good strength properties and are easily malleable. They are divided into heavy and light metals, depending on their density, and into precious and base metals, depending on their chemical resistance. Further divisions include ferrous and non-ferrous metals.
Can be used as structural or design elements, high mechanical resistance, good chemical resistance (e.g. stainless steel, anodized aluminium), long service life, good workability
Joining metal surfaces with wood or wood-based materials can be easily done with the help of polyurethane adhesives. When bonding larger surface areas (> 0.25 m²), high tensions can be expected due to the different thermal expansion of the materials. In these cases, we recommend using an elastic adhesive (Pattex PL 300). Before applying the adhesive, metal surfaces must be thoroughly cleaned with suitable cleaners such as acetone or pure alcohol. Roughening the surface can increase the strength of the bond, particularly with polished metals. The proper sequence of steps is cleaning – sanding – cleaning.
Metal-to-metal bonding or bonding metal on non-absorbent surfaces is possible with 2-component adhesives, contact adhesives (Pattex Liquid or the sprayable Pattex Air Classic), or – in the case of smaller areas (maximum width = 10 cm) – with 1-component assembly adhesives (Pattex PL 300).
In the case of powder-coated sheet metal or metal parts, the bond is formed between the coating and the adhesive and not between the metal and the adhesive. Powder coatings often contain certain amounts of adhesion-inhibiting substances (silicones, paraffins). We therefore recommend that the surface to be bonded is carefully cleaned, roughened and pre-treated with an adhesion-promoting cleaner.