Common Types of Metal Sealants Used in Various Metals

corrosion prevention

One of the concerns that companies involved in manufacturing metals have is the fluids that find their way to the surface, joints, or openings in materials. And the substance that they use as a solution to this problem is a sealant, which acts as a protective layer that blocks the transit of any fluid. Today, many types of sealants are readily available on the market designed for specific metals.

Here are some of the most commonly used sealants and their respective compatible metals.

Polyurethane sealants

Composed of organic units combined by carbamate links, polyurethane is used in manufacturing foam insulation panels, elastomeric wheels and tires, adhesives, foam seating, automotive, suspension bushings, and surface coatings and sealants.

Polyurethane sealants are found to be quick-drying and moisture-cured, which is why it is being used mainly in industries such as in automotive, building, and construction. They work well on concrete, bond fibreglass panels, and seal joints in floors and walls.

Primer sealants

Usually, primers are used on new surfaces that have never been painted. As the name implies, they are applied as a primary or first coat to a substrate. They seal or provide a barrier to something in the substrate.

Other purposes of primers include penetrating and stabilising the substrate to produce a firm surface of uniform porosity, as well as providing corrosion protection to the substrate.

Primers can be applied to any metal for corrosion prevention, oxidation, and rust prevention.

Silicone sealants

Due to its highest movement capability, longer service life, over time flexibility, and resistance to UV and temperature, silicone sealants are used in many building applications. They are used in sealing gaps around showers, worktops, downpipes, and gutters, fixing glass or mirrors to tiled surfaces, repairing rubber trim on vehicles, gluing aquariums, and many more.

Silicone sealants can have a strong odour but are completely waterproof. They can bond well with most surfaces, and they inhibit mildew growth. They can be applied to metals such as aluminium, copper, galvanised steel, iron, stainless steel, and steel.

Tripolymer sealants

An elastomeric sealant can be used in a variety of architectural metals, general construction, roofing, solar roof system, trim, and underdeck system applications. Its features include flexibility, UV resistance, adhesive to building surfaces, paintability, resealability, compatibility to an asphalt shingle, etc.

However, the use of this sealant in high-traffic areas, in areas where food is prepared, or in glazing surfaces is discouraged.

Peelable coatings

Unituff coatings are different from all other in the market.

That’s the reason why it has become known as a market leader in the Oil&Gas sector.

How has it been saving millions of dollars?

  1. Peelable - the easy peel-off system that Unituff employees ensures very fast installation of product. Saves you the process of ‘picking’ it off, or trying to grind it back, or even washing it off.
  2. Where the coating is, the rust isn’t! Literally! It creates an impermeable barrier against rust, ensuring there is no seepage of any existing rust to the critical surfaces.  
  3. Non-residue - saves you that time in installation. The non-residue saves all clean up at the time of installation. None of that time spent trying to clean your flange. Just peel it off, and there you go!

Call +1 832 533 5628 (USA) or +61 7 400 796 022 (Australia).

For all your sealant needs, contact Unituff today!