5:1 Black Epoxy Potting Compound HN-5508A/B – Transformer & Power Supply Encapsulation

Hanast HN-5508A/B is a high-performance 5:1 black epoxy potting compound specifically engineered for transformer manufacturing and power supply module encapsulation. With a Shore D hardness of 85-95 after full cure, it forms an exceptionally tough, acid-and-alkali-resistant protective shell that shields critical electronic components from moisture, chemical attack, vibration, and unauthorized disassembly.

Key Features

• Optimized for Transformer Manufacturing – Purpose-formulated for potting and sealing transformers, coils, high-voltage flyback transformers, and inductive components in mass production environments
• Acid & Alkali Chemical Resistance – Withstands exposure to aggressive chemical environments including acidic and alkaline substances, ensuring long-term reliability in industrial installations
• High Hardness 85-95 Shore D – Cures to an extremely hard, rigid finish that provides anti-tamper security and prevents reverse engineering of proprietary circuit designs
• Moisture-Proof & Anti-Disassembly – Creates a hermetic seal that blocks moisture ingress while the rock-hard cured surface deters physical tampering and component removal
• 5:1 Convenient Mix Ratio – Standard 5:1 weight ratio, supplied in 25kg barrels, compatible with automatic dispensing equipment for high-volume transformer production lines
• Dual Cure Options – Room temperature cure (12-16h full cure at 25°C) or accelerated thermal cure (1.5-2h at 60-80°C) for faster production throughput
• RoHS & REACH Compliant – Meets international environmental standards for electronic component supply chains

Technical Specifications

Recommended Applications

• Transformer Potting & Encapsulation – Primary solution for power transformers, high-voltage flyback transformers (FBT), ignition coils, and inductive components requiring rigid environmental protection and dielectric insulation
• Power Supply Module Sealing – Complete moisture-proof encapsulation for AC/DC power modules, switching power supplies, and industrial power converters
• Automotive Electronics – Under-hood ECU modules, ignition systems, and automotive power electronics exposed to vibration, temperature cycling, and chemical contaminants
• Industrial Electronic Assemblies – Circuit board potting for factory automation equipment, motor drives, and industrial controllers operating in harsh environments
• Anti-Tamper Security Potting – Hard, non-removable seal ideal for protecting proprietary PCB designs, payment terminals, and security-sensitive electronic modules against reverse engineering

Bulk Supply & China Factory Direct

As a bulk industrial epoxy potting manufacturer in China, Hanast ships HN-5508A/B in convenient 25kg/barrel packaging. Every batch includes full MSDS, TDS, and shipping certification. Sample orders dispatched via FedEx/DHL express (3-5 working days), bulk production orders via sea freight with 10-15 day lead time. Custom packaging, private labeling, and modified formulations available for OEM transformer manufacturing partners.

Mixing & Application Guidelines

1. Accurate Weighing: Mix Part A and Part B at exactly 5:1 by weight using an electronic scale — never estimate by volume
2. Thorough Mixing: Stir for 2-3 minutes until uniformly blended; use a flat mixing tool with resistance, not a round rod
3. Vacuum Degassing: Degas for 3-5 minutes to remove entrapped air and ensure bubble-free encapsulation
4. Controlled Pouring: Pour within the 30-40 minute pot life window at 25°C
5. Curing: Room temperature cure yields 6-8h surface tack-free and 12-16h full hardness. For high-volume transformer production, heat cure at 60-80°C for 1.5-2h for maximum throughput and superior mechanical properties

Contact us today to request a free sample for transformer potting trials or discuss bulk wholesale pricing for your manufacturing line.