Q: What temperature range does the glue gun operate at?
It's adjustable from 285°F to 428°F, making this a high temp hot glue gun that can dial in the exact viscosity a repair or production job calls for.
03K0350 - FastenMaster Pro Hot-Melt Gun
This is a professional-grade hot-melt glue gun. It provides smooth, dripless flow at a controllable rate, so you can dispense slowly for repairs and other precise work, or choose faster output to speed large jobs such as flooring or carpet installation.
Its 220W heating element warms quickly, so it’s ready to use in just a few minutes. To control the flow, you can adjust the trigger throw as well as the temperature from 285° to 428°F (140° to 220°C), which regulates the viscosity of the glue so you can dispense as slowly or quickly as needed without straining your grip. Releasing the trigger stops the flow instantly, and the simple but effective integral stand helps prevent mess when you set it down.
There are two high-quality hot-melt adhesive formulations available, letting you choose a glue with the initial tack strength and working time that’s best suited for the task.
Two optional nozzles are available separately: a double-flow nozzle for rapid output and a repair nozzle for precise application.
Highly recommended.
It's adjustable from 285°F to 428°F, making this a high temp hot glue gun that can dial in the exact viscosity a repair or production job calls for.
No, releasing the trigger stops the flow immediately, so there's minimal dripping between applications.
The two formulations (available separately) differ mainly in tack strength and working time. Choose the faster-tacking one for quick assembly and the slower one when you need extra time to adjust a joint before it sets.
A double-flow nozzle speeds up output for larger jobs, while a repair nozzle narrows the stream for precise, small-scale application.
The 220W heating element gets the glue gun to working temperature in just a few minutes, so there's little wait before use.
| Package Quantity | 1 item |
| Compatibility | Compatible with FastenMaster Flex 40 and Flex 180 adhesive sticks |
| Includes | Hot-melt glue gun |
| Temperature Rating | 285°F–428°F (140°C–220°C) |
| Power Source | 220W grounded outlet |
| Warranty | Lee Valley Satisfaction Guarantee |

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Variations:
FastenMaster Pro Hot-Melt Gun
This is a professional-grade hot-melt glue gun. It provides smooth, dripless flow at a controllable rate, so you can dispense slowly for repairs and other precise work, or choose faster output to speed large jobs such as flooring or carpet installation.
Its 220W heating element warms quickly, so it’s ready to use in just a few minutes. To control the flow, you can adjust the trigger throw as well as the temperature from 285° to 428°F (140° to 220°C), which regulates the viscosity of the glue so you can dispense as slowly or quickly as needed without straining your grip. Releasing the trigger stops the flow instantly, and the simple but effective integral stand helps prevent mess when you set it down.
There are two high-quality hot-melt adhesive formulations available, letting you choose a glue with the initial tack strength and working time that’s best suited for the task.
Two optional nozzles are available separately: a double-flow nozzle for rapid output and a repair nozzle for precise application.
Highly recommended.
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