H.B. Fuller Tonsan® 1591H is a silicone-based sealant designed for flange sealing in engine components. It offers instant sealing with medium viscosity, high strength, and high elongation. The sealant exhibits excellent resistance to heat aging and oil exposure, making it reliable for demanding automotive applications.
Features of H.B. Fuller Tonsan® 1591H
Easy to apply
Excellent chemical resistance
High temperature resistance
Reliable sealing performance
High efficiency
High elongation (480% at room temperature)
Fast tack-free time (5-15 minutes)
Wide operating temperature range (-54°C to 210°C)
Applications of H.B. Fuller Tonsan® 1591H
Flange sealing of engine parts
Suitable for both mechanical and manual application methods
Ideal for use in automotive powertrain and under-the-hood components
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.
Property
Value
Units
Specific Gravity
1.36
g/cm³
Tensile Strength (Room Temperature)
2.8
MPa
Elongation at Break (Room Temperature)
480
%
Tensile Strength (After Aging 168h at 175°C)
2.9
MPa
Elongation at Break (After Aging 168h at 175°C)
350
%
Tensile Strength (After Soaking in 30# Engine Oil 100h at 125°C)
2.4
MPa
Elongation at Break (After Soaking in 30# Engine Oil 100h at 125°C)
