Epoxy Sealers

Epoxy is a material derived from petroleum products. It has a high level of bonding properties and it can offer a hard layer of protection also. Epoxy is resistant to humidity, moisture, excessive heat and very low temperatures. Epoxy is especially used with metals that are subject to a lot of stress (e.g. hulls of airplanes, metal plating specific to ships) but also with wood, in the construction of furniture for example. Given the properties of epoxy, it is easy to understand that epoxy sealers are successfully used with aluminum, steel, fiberglass, wood and concrete. Epoxy sealers are waterproof, inhibiting moisture migration.

There are sealers that will permit moisture vapor transmission to take place. They are used for concrete and keep moisture out while allowing the concrete to breathe. Used for concrete, epoxy sealers will enhance wear resistance of the surface, inhibit the corrosion process of the reinforcing steel and prolong the life of the structure. Another advantage of using this kind of sealers is that they are flexible and the shrinking phenomenon does not occur. They may also be scratch-resistant. Application is usually done with roller, brush, squeegee or airless spray. Before applying epoxy sealers it is important to know the mixing procedure of the two components of the sealer and the curing time. Sealers will only be applied after the surface has been prepared.

Old existing coatings must be removed, as well as oils, grease, dirt and wax solutions. Sandblast or water-blast is used for the removal of contamination, sharp edges or protrusions. Uneven surfaces interfere with the uniform application of the sealer. It is not recommended to use acids to prepare the surface. It is important to be precautious when working with epoxy sealers. Contact with eyes/skin must be avoided and ventilation is necessary when working indoors. Wearing safety glasses and protective rubber or polyethylene gloves is also recommended.

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