HumiSeal® 789
HumiSeal® 789 is a high-performance thinner specifically developed as a diluent for solvent-based conformal coating products. Designed to be compatible with certain Acrylic, Polyurethane, and Synthetic Rubber coating systems, HumiSeal® 789 offers excellent versatility and efficiency in coating applications. What sets this thinner apart is its formulation—completely free from Xylene, Toluene, and Ethyl Benzene—making it a safer, low-toxicity choice for manufacturers concerned with regulatory compliance and workplace safety. Its extremely low aromatic hydrocarbon content minimizes odor during use, while ensuring low bubble entrapment and a superior surface finish. With evaporation rates and drying times similar to those of Thinner 521 and 521 EU, HumiSeal® 789 is an ideal substitute that delivers consistent results and excellent compatibility with a variety of coating types. For operations requiring both safety and performance, HumiSeal® 789 stands as a reliable and compliant solution for high-quality conformal coating processes.
About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
- Provide quotation, sample, TDS/MSDS, and technical consultation
- Testing sample quality and verifying product compatibility in our laboratory
- Customizing material formulas for special applications
- Adapting product sizes, quantities, and packaging to meet specific needs
- Offering expert advice on suitable equipment and automation processes
- Delivering technical training and on-site support for optimal product use
Moreover, Prostech ensures the safe and accurate global delivery of all materials, including “dangerous goods”, in compliance with legal regulations. For personalized technical support or to receive a quotation, please contact us today.
| Compatible HumiSeal® Coatings | 1A27, 1A33, 1B31, 1B66, 1R32, 1B51 |
| Relative Evaporating Rate (BuAc=1) | 0.5 |
| Specific Gravity at 25°C | 0.75 ± 0.01 |
| Boiling Point (°C) | 140–165 |
| Vapor Pressure at 20°C (kPa) | 1.3 |
| Flash Point (°C) TCC | 26 |
| VOC (grams/litre) | 750 |
| Shelf Life, DOM | 24 months |
| Colour | Clear |
