HumiSeal 2C51 Gains UL Approval

For Immediate Release

HumiSeal continues to strengthen its silicone portfolio of products by gaining UL94 approval for the new 2C51 – a dual purpose silicone conformal coating and potting material.

Recently announced, HumiSeal 2C51 has been specifically designed to overcome various challenges for both coating and potting of circuit boards. The Underwriters Laboratories recognition has been tailored to both application types.

HumiSeal 2C51 has gained a UL94 V0 rating with a conformal coating thickness of 2-8 mils (50-200µm). Furthermore, 2C51 is also recognized as a potting material for 95-375 mils (2415-9600 µm) with an HB rating.

2C51 is a two-part silicone with a simple 1:1 mix ratio. Its Autocatalytic cure will complete within 60 minutes at room temperature or can be accelerated by applying a slightly elevated temperature.    This is an environmentally friendly coating which has zero VOCs and is 100% solids upon mixing.    The cured 2C51 is a transparent film with slight blue tint visible at the higher thickness levels.

Keith Waryold (Vice President of Industrial Materials and Technology) said “Our UL recognized portfolio of products continues to be industry’s strongest and the most comprehensive. HumiSeal’s 2C51 will join many other products already under the UL recognition umbrella. We continue to invest in new product development and we stay committed to further our stronghold as the technology leader in electronic protection materials.”

– ends – 

About HumiSeal

HumiSeal provides the widest selection of products to meet its customer’s tough electrical and environmental requirements for enhancing device circuit integrity. It manufactures over 60 coatings, thinners, strippers and masking materials and can also offer custom formulations to meet unusual specifications. HumiSeal® products are qualified to MIL-I-46058C, IEC 60664-3, UL 746E and IPC-CC-830 standards.

HumiSeal is an ISO TS-16949 qualified supplier.

HumiSeal® and Resign Designs are part of the Chase Electronic and Industrial Coatings group, which in turn is a part of the Chase Corporation enterprise. Chase Corporation produces adhesives, sealants, tapes and membranes from a wide variety of chemistries such as epoxies, urethanes, acrylics, silicones, and elastomers. These products are used for corrosion protection in electronic, pipeline, bridge, highway and architectural applications.

Chase Corporation was founded in 1946 and has grown to become an innovative manufacturer of advanced protective materials with a global customer base. Two operating divisions manage the development, manufacture, and marketing of industry leading brands that provide highly engineered protective features for use in the demanding applications of energy, electronics, telecommunications, construction, transportation, and utilities.

For further information about HumiSeal®’s products please contact: 

HumiSeal North American Sales
     Chase Global Operations Center, 295 University Ave, Westwood, MA 02090
     Tel: +1 781-332-0772 • Toll Free (US only): 800-323-4182 • Email:
 HumiSeal Technical Support
      Tel: +1 781-332-0734 • Email:
 HumiSeal Asian Support
     Tel: +852-9451-6434 • Fax: +852-2413-6289 • Email:
 HumiSeal Europe
    505 Eskdale Road, Winnersh, Berkshire RG41 5TU, UK
    Tel: +44 (0)1189 442333 • Fax: +44 (0)1189 335799 •
 HumiSeal S.A.R.L
   4/6 Avenue Eiffel, 78420 Carrieres-Sur-Seine, France
   Tel: +33 (0) 1 30 09 86 86 • Fax: +33 (0) 1 30 09 86 87
 For all HumiSeal® media enquiries, please contact:
   Christian Silahian –

Contact Us