Product Name
Permabond TA4820 Medium Set 15-18 min No-Primer Metals & Plastics Acrylic Adhesive (50ml And 400ml)
Brief Description
Permabond TA4820 is a two-part, 1:1 toughened methacrylate (acrylic) adhesive designed for structural bonding. It forms high-strength, durable bonds to a wide variety of thermoplastics, thermosets, metals, and composites, often without the need for surface primers.
Popular Applications & Uses
- Structural bonding of diverse materials including various metals, plastics, and composites.- Applications requiring high shear and peel strength, as well as good impact resistance.- Bonding larger components where a longer fixture time is beneficial for accurate alignment.- Assemblies exposed to common industrial solvents, fuels, and harsh environmental conditions.
Industries that Commonly Use It
- Aerospace/Defense- Automotive Service/Repair- Chemical Industry- Construction/ Building Services- Electrical Services or Products- Energy- Engineering Services- Fabrication- General Manufacturing- Government & Military- Industrial Supply- LED/Electronics- Marine- Medical Device/ Prosthetics- Metal Fabrication- Plastic Fabrication- Transportation/ Specialty Vehicle
Special and Unique Features
- No primer required for excellent adhesion to many as-received metal surfaces.- Cures rapidly at room temperature.- Thixotropic properties allow for easy dispensing through static mixing nozzles while maintaining good gap-filling and non-sag characteristics.- Provides exceptional durability and resistance to common industrial solvents, fuels, and harsh environmental conditions.- Offers high shear and peel strength, along with good impact strength.- Longer fixture time facilitates accurate alignment of larger components.
Key Properties
- Chemical composition: Methyl Methacrylate (MMA)- Mixed color: Cream- Ratio of use: 1:1- Maximum gap fill: 2mm (0.08")- Pot life (10g+10g) @23°C: 10-15 minutes- Fixture time @23°C: 25-35 minutes- Handling time @23°C: 45-60 minutes- Working strength @23°C: 100-120 minutes- Full cure @23°C: 24 hours- Shear strength (Steel): 21-28 N/mm² (3000-4000 psi)- Temperature resistance: -40°C to 120°C (-40°F to 250°F)- Viscosity (mixed): 160,000-250,000 mPa.s (cP)
Surface Compatibility
- Thermoplastics- Thermosets- Metals (including as-received steel, aluminum, copper, and its alloys)- Composites (e.g., fiberglass, SMC)
Known backups / known substitutes
- Permabond TA4810: A similar structural acrylic adhesive with a faster set time.- Permabond TA4207: A fast-cure, multi-purpose acrylic adhesive suitable for a wide variety of substrates, including galvanized steel.- Permabond TA440: A non-flammable structural acrylic adhesive that can be dispensed bead-on-bead.- Other two-part methacrylate or structural acrylic adhesives from Permabond or other manufacturers with similar performance characteristics.
Comparison Note
Permabond TA4820 is distinguished by its medium set time (15-18 minutes), offering a longer fixture time compared to faster-setting alternatives like Permabond TA4810, which is advantageous for aligning larger or more complex components. It provides excellent adhesion to a wide range of substrates, including many metals without the need for a primer, simplifying the bonding process and reducing preparation steps.
