One of the original creators and innovators in conformal coatings, HumiSeal® has led the way for over 50 years and today stands out as a uniquely experienced and dynamic company. HumiSeal is the only company in the market whose sole business is the development and supply of conformal coatings.

A conformal coating is a protective chemical coating or polymer film 25-75μm thick (50μm typical) that ‘conforms’ to the circuit board topology. Its purpose is to protect electronic circuits from harsh environments that may contain moisture and/or chemical contaminants. Some typical application examples include high-reliability defence, automotive and aerospace, where coatings are used to protect against various combinations of moisture, aggressive chemicals and vapours, salt sprays, large temperature variations, mechanical vibration, and even organic attack (e.g. fungus).

Types of conformal coating:

  • Acrylic conformal coatings are perhaps the most popular of all conformal coating materials due to their ease of application, removal and forgiving nature. Acrylics dry rapidly, reaching optimum physical properties in minutes, are fungus resistant and provide long pot life.
  • Silicone conformal coatings are most widely used in high temperature environments due to their innate ability to withstand prolonged exposure to higher temperatures than most other conformal coating chemistries.
  • HumiSeal’s Synthetic Rubber products are unique formulations that may enable the user to achieve specific protection / environmental goals not offered by “traditional” coatings. Synthetic Rubber materials are characterized by extremely low glass transition temperatures, resulting in stable modulus over a wide temperature range and extreme flexibility.
  • Polyurethane coatings are available as either single or two-component formulations. Both formulations provide excellent humidity resistance and far greater chemical resistance than Acrylic coatings.
  • HumiSeal UV40 is now UL recognized and represents an exciting innovation in UV curable chemistry that provides performance superiority, over both traditional UV curable products and solvent-based materials.
  • Water-based conformal coatings, by their very nature are extremely safe, low odour, low VOC products, developed to enable customers to meet the ever stricter emissions targets, not to mention the various health and safety requirements placed on industry.
  • TempSeal (HumiSeal TS300) is a non-flammable, high temperature, temporary mask specially designed and formulated to be used on printed circuit boards that require masking during the conformal coating process.
  • HumiSeal´s Strippers are specifically formulated to be effective on different coating chemistries.
  • HumiSeal´s Thinners are specifically formulated to be used in conjunction with specific coating products.