Product Introduction
The H.B. Fuller Tonsan® 1591H is a silicone-based sealant designed for flange sealing in engine components. With its medium viscosity and high strength, it provides instant sealing and offers exceptional resistance to heat aging and oil exposure, making it ideal for demanding automotive applications.
H.B. Fuller Tonsan® 1591H Features:
- High strength and elongation (480% at room temperature).
- Excellent chemical resistance and high temperature resistance.
- Fast tack-free time (5-15 minutes).
- Reliable sealing performance across a wide temperature range (-54°C to 210°C).
- Easy application with both mechanical and manual methods.
H.B. Fuller Tonsan® 1591H Applications:
- Flange Sealing: Sealing engine parts for automotive and industrial applications.
- Automotive Powertrain & Under-the-Hood Components: Provides secure seals in high-temperature environments.
- General Sealing Applications: Suitable for a variety of sealing and gasketing needs.
About Prostech
Prostech Philippines is a one-stop solution provider for specialty materials and equipment across electronics manufacturing, from PCBA to final assembly. Our core material and equipment solutions include:
- PCB Assembly Materials
- Cleaning & Degreaser
- Circuit Board Protection
- Thermal Management Solutions
- EMI Shielding
- General Assembly Adhesives
- Elastomeric Materials
- Process Equipment: Potting & Coating Systems, UV/ Heat Curing, Plasma Treatment, Tape placement automation, and cleaning machines
Technical Added Value to customer
Prostech offers customized material and process equipment solutions with engineering support throughout R&D, production process optimization, and performance validation. Our in-house lab located in Alabang, Muntinlupa is equipped to conduct electronics material testing, application simulation, and adhesive validation, helping customers reduce the need for onsite trials and accelerate implementation.
International Supply Chain Advantage
Regional warehouse hubs across Vietnam, Singapore, Malaysia, and the Philippines ensure cross-border reliable supply. In Philippines PEZA-bonded warehouse located at Lima Industrial Park, Batangas enables Prostech to provide responsive, demand-based delivery and significantly shortens standard lead time for Philippines customers.
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| 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) | 500 | % |
| Tack-Free Time | 5-15 | Minutes |
| Curing Depth (24h) | <2 | mm |
| Temperature Range | -54 to 210 | °C |
