Product Name
Permabond Modified Epoxy MT3809 (Gray) Medium Set 10 - 12 min Cartridge and Starter Kit
Brief Description
Permabond MT3809 is a 10:1 ratio, two-part, modified epoxy adhesive designed for potting, encapsulation, sealing, and bonding applications. It features low viscosity and self-leveling properties, curing at room temperature to a soft and flexible state.
Popular Applications & Uses
- Potting and encapsulation of intricate parts and sensitive electronic components.- Sealing and bonding of dissimilar materials.- Electrical component protection from moisture and impact.- Vibration-damping adhesive joints.- Industrial repair and assembly bonding.- Manufacturing of advanced composite structures.- Providing corrosion protection.
Industries that Commonly Use It
- Aerospace/Defense- Automotive Service/Repair- LED/Electronics- General Manufacturing- Metal Fabrication- Plastic Fabrication- Distributers & Resellers- Industrial Supply- Transportation/ Specialty Vehicle
Special and Unique Features
- Modified epoxy technology provides increased flexibility and low shrinkage.- Self-leveling, low viscosity formula is ideal for potting intricate parts and ensuring complete void coverage.- Achieves full cure at room temperature.- The cured adhesive is soft and flexible, effectively absorbing vibration and thermal expansion stresses.- Offers excellent adhesion to a wide variety of substrates, including numerous plastics and metals.- Provides a fast handling time of 25-30 minutes.- Resists moisture, vibration, and temperature cycling.- Exhibits low outgassing properties.
Key Properties
- **Chemical Composition:** Epoxy based resin, Polyamine based hardener.- **Mix Ratio (by volume):** 10:1 (resin:hardener).- **Appearance (Mixed):** Charcoal black (product is marketed as Gray).- **Viscosity @ 25°C (Mixed):** 5,000-10,000 mPa.s (cP).- **Usable / Pot Life @ 25°C:** 10-12 minutes.- **Handling Time @ 25°C:** 25-30 minutes.- **Full Cure @ 25°C:** ≥72 hours.- **Hardness (ISO868):** 75-85 Shore A / 20-30 Shore D.- **Elongation at Break (ISO37):** 150%.- **Service Temperature Range:** -40°C to +120°C (withstands higher temperatures for brief periods).- **Shear Strength (Mild Steel):** 6-8 N/mm² (900-1200 psi).- **Peel Strength (Aluminum):** 60-80 N/25mm (13-18 PIW).
Surface Compatibility
- Nylon- ABS- Polycarbonate- PVC- Acrylic- Mild Steel- Aluminum- Other engineering plastics- Composites (FRP, Carbon Fiber)- Wood- Glass- Concrete, Masonry, Brick, StoneNote: Surfaces should be clean, dry, and grease-free before application. Light abrasion with emery cloth may enhance adhesion for some metals like aluminum and copper.
Known backups / known substitutes
- Permabond MT382: A two-part, modified epoxy adhesive with a 2:1 mix ratio, self-leveling, 20-50 minute pot life, 175% elongation, and 70 Shore A hardness.- Permabond MT3821: A two-part, modified epoxy adhesive with a 2:1 mix ratio, thixotropic paste, 10-20 minute pot life, 125% elongation, and 70 Shore A hardness.- Other two-part epoxy adhesives, particularly those formulated for potting and flexible bonding applications.- Silicone-modified epoxy potting compounds such as GS Polymer's SM 1001-3FR and SM 2000-1, which offer exceptional adhesion to metal without the need for a primer.- MS Polymers: Single-component, moisture-curing hybrid technology adhesives known for high elongation, flexibility, and excellent environmental resistance.
Comparison Note
Permabond MT3809 is a modified epoxy, distinguishing itself from traditional rigid epoxies by offering enhanced flexibility, low shrinkage, and high peel strength. This modification allows it to absorb stresses from thermal expansion and contraction, making it particularly suitable for delicate components where the rigidity of conventional epoxies could cause stress. Additionally, it provides a faster set time compared to many MS Polymers.
