EV Therm 420 is an acrylic 2K thermal adhesive from H.B. Fuller, rated >1.0 W/m·K. Typical uses: High-strength bonding of aluminum, stainless, plated steel, thermosets, thermoplastics. Short answer: we dispense it with a PDP two-component progressive cavity metering pump with a static mixer.
Material at a glance
| Manufacturer | H.B. Fuller |
|---|---|
| Type | 2K thermal adhesive |
| Chemistry | Acrylic |
| Thermal conductivity | >1.0 W/m·K |
| Mix ratio | 10:1 by volume; 14:1 by weight |
| Cure | Room temp 24 h |
| Packages | 50 mL cartridge; 490 mL cartridge |
From the manufacturer's published data (source). Always work from the current technical data sheet.
How we dispense it
For a two-component thermally conductive adhesive we start with a PDP two-component progressive cavity metering pump and a disposable static mixer, fed from dual cartridges for lab and low volume, or from pails with a follower-plate pail pump for production. Pump size depends on your shot or bead size and cycle time.
- Abrasion: the ceramic filler that carries the heat wears pumps out. We use tungsten carbide rotors and wear-resistant stators and run the pump slowly, at 8 to 12 rpm, for long wear life.
- Ratio: each side is metered by its own progressive cavity pump to within ±1%. Check ratio by weighing a shot from each side every week, because filled materials vary from batch to batch.
- Mixing: a disposable static mixer does the mixing. Purge or change it before the material's working life runs out.
See our PDP two-component metering pumps, or use the pump configurator.
Frequently asked questions
What pump should I use to dispense EV Therm 420?
For a two-component thermally conductive adhesive we start with a PDP two-component progressive cavity metering pump and a disposable static mixer, fed from dual cartridges for lab and low volume, or from pails with a follower-plate pail pump for production. Pump size depends on your shot or bead size and cycle time; send us those and we will size it.
Can EV Therm 420 be fed from pails instead of cartridges?
H.B. Fuller lists these packages: 50 mL cartridge; 490 mL cartridge. Cartridges suit lab and low volume. Above that, a follower-plate pail pump feeds the metering pump directly, which cuts container changes and waste.
How do you keep EV Therm 420 on ratio?
Each side is metered by its own progressive cavity pump, held to within ±1% per side. We recommend a weekly check: weigh a shot from each side and adjust, because filled materials vary from batch to batch.
Will EV Therm 420 wear out the pump?
Thermally conductive fillers are abrasive. With tungsten carbide rotors, wear-resistant stators and pump speeds of 8 to 12 rpm, stators typically last 6 to 12 months and rotors up to 24 months, and a pump rebuild takes under an hour.
Talk it through with us
Running EV Therm 420, or about to? Send us the technical data sheet, your bead or shot size and your cycle time, and we'll recommend a pump and feed system. We can run an application test on your material before you buy. Contact us
Related materials
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- LOCTITE TLB 9300 APSi · Henkel Loctite, 2K thermal adhesive (structural, EV battery)
- LOCTITE TLB 9270APS · Henkel Loctite, 2K thermal adhesive (EV battery)
- CoolTherm UR-2000 · Parker LORD, 2K gap filler / thermal adhesive
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EV Therm 420 is a trademark of H.B. Fuller or its affiliates. Dispense Robotics is not affiliated with the manufacturer; the name is used to describe the material our equipment dispenses.