MG Chemicals 8800-375ML | Black Flexible Urethane Potting Compound | 2-Part, 375ml Kit | Marine & PCB
MG Chemicals 8800-375ML | Black Flexible Urethane Potting Compound | 2-Part, 375ml Kit | Marine & PCB
MG Chemicals 8800-375ML is a black, 2-part flexible polyurethane potting compound designed for encapsulating and protecting electronic assemblies, sensors, and components in demanding environments. The low mixed viscosity allows it to flow into tight spaces and around complex geometries before curing to a tough, flexible rubber that absorbs mechanical shock and vibration without cracking. Excellent moisture resistance and wide service temperature range make it an ideal choice for outdoor, marine, automotive, and other harsh-environment applications. Maintains flexibility at low temperatures down to −50°C. Sold as a 2-bottle kit (Part A + Part B), 375ml total volume.
Key Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 8800-375ML |
| Color | Black |
| Type | 2-part flexible polyurethane resin |
| Mix Ratio | 2:1 (by volume) |
| Working Time | 5–7 minutes |
| Cure Time | 24 hours at room temperature |
| Service Temperature | −50°C to +120°C (−58°F to +248°F) |
| Net Volume | 375 mL |
| Net Weight | 418 g |
| Packaging | 2-bottle kit (Part A + Part B) |
| Brand | MG Chemicals |
Key Features
- Flexible cure — cures to a tough, flexible rubber that absorbs mechanical shock and vibration without cracking or delaminating; creates minimum stress on circuit boards and surface-mounted components
- Low mixed viscosity — flows freely into tight enclosures, around component leads, and through complex geometries before cure, ensuring complete void-free encapsulation
- Wide service temperature range — maintains flexibility and protection from −50°C to +120°C, making it suitable for outdoor, automotive, and industrial applications with extreme temperature cycling
- Superior moisture resistance — excellent protection against moisture ingress, humidity, and condensation; rated for saltwater exposure and marine applications including underwater potting
- Strong multi-substrate adhesion — adheres to metals, composites, glass, ceramics, and most plastics without primer for most applications
- Excellent dielectric properties — electrically insulating cure provides reliable isolation of conductors and components in potted assemblies
- 5–7 minute working time — sufficient working time for hand-mixing and pouring into molds or enclosures; fast enough for production workflows
Applications
- PCB and electronic assembly potting and encapsulation
- Marine electronics — waterproof and saltwater-resistant potting
- Outdoor sensor and junction box encapsulation
- Automotive and transportation electronics
- Industrial control and motor electronics in harsh environments
- LED driver and lighting assembly potting
Frequently Asked Questions
What is the mix ratio for MG Chemicals 8800 and how should it be mixed?
The 8800 uses a 2:1 mix ratio by volume (2 parts Part A to 1 part Part B). Measure accurately by volume using graduated mixing cups. Combine the two parts and mix thoroughly for the full recommended time — incomplete mixing is the most common cause of soft spots or incomplete cure. Use within the 5–7 minute working time after mixing. Do not attempt to extend working time by refrigerating the mixed material.
Can the 8800 be used for underwater or marine applications?
Yes — the 8800 is specifically noted as an ideal underwater potting compound. Its superior moisture resistance and strong adhesion to metals, composites, and plastics make it well-suited for marine electronics, underwater sensors, bilge pump electronics, and other saltwater-exposure applications.
How does the 8800 perform at low temperatures?
The 8800 maintains flexibility down to −50°C (−58°F), which is critical for outdoor and cold-climate applications. Many rigid potting compounds become brittle at low temperatures and can crack or delaminate from substrates under thermal cycling. The 8800’s flexible polyurethane chemistry avoids this failure mode.
Will the 8800 stress or damage surface-mounted components?
No — the flexible cure of the 8800 is specifically designed to minimize stress on circuit boards and SMD components. Unlike rigid epoxy potting compounds that can crack solder joints or component bodies under thermal cycling, the 8800’s flexible matrix moves with the board and components, absorbing stress rather than transmitting it.
What surfaces does the 8800 adhere to?
The 8800 adheres strongly to metals, composites, glass, ceramics, and most plastics without primer. For difficult substrates or critical adhesion requirements, consult the MG Chemicals TDS for surface preparation recommendations. Contact MTE Solutions at 651-600-3838 for application-specific guidance.
