1. Introduction
Thank you for choosing the SEESII Electric Cordless Caulking Gun. This tool is designed to make your caulking tasks easier, faster, and more precise, reducing fatigue associated with manual caulking guns. It is ideal for various home improvement and DIY projects, offering consistent and smooth adhesive application.
2. Important Safety Information
Always follow basic safety precautions when using electric tools to reduce the risk of fire, electric shock, and personal injury.
- Read all instructions carefully before operating the tool.
- Keep your work area clean and well-lit. Cluttered or dark areas invite accidents.
- Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
- Wear appropriate personal protective equipment (PPE) such as safety glasses, gloves, and a dust mask if necessary.
- Ensure the battery is fully charged before use and removed when not in use or during maintenance.
- Use only the charger specified by the manufacturer for recharging.
- Avoid unintentional starting. Ensure the switch is in the off-position before connecting to battery pack, picking up or carrying the tool.
- Do not force the power tool. Use the correct power tool for your application.
- Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool.
3. Package Contents
Verify that all items are present and in good condition upon unpacking:
- SEESII Electric Cordless Caulking Gun (10oz / 300ml capacity)
- 2 x 2000mAh Lithium-Ion Batteries
- Battery Charger

4. Key Features
- Effortless Operation: User-friendly trigger operation reduces hand fatigue compared to manual guns.
- Stepless Speed Regulation: Adjustable forcing speeds from 0 to 7.5mm/s for precise control.
- High Dispense Force: Up to 4000N for efficient application of various adhesives.
- Extended Battery Life: Two 2000mAh Lithium-Ion batteries, each capable of handling up to 100 caulk tubes on a single charge.
- Anti-Drip Design: Automatic retract system prevents excess adhesive leakage after trigger release, ensuring a cleaner workspace.
- Integrated LED Light: Provides enhanced visibility in dimly lit work areas.
- 360° Rotating Cartridge Holder: Allows for easy adjustment to optimal angles for flexible and convenient caulking.


5. Setup
5.1 Charging the Battery
- Connect the charger to a power outlet.
- Insert the battery into the charger. The indicator light on the charger will show the charging status.
- Once fully charged, remove the battery from the charger.
5.2 Installing the Battery
- Align the charged battery with the battery slot on the bottom of the caulk gun handle.
- Slide the battery into the slot until it clicks securely into place.
5.3 Loading the Caulk Tube
- Pull back the plunger rod completely to open the cartridge holder.
- Insert the caulk tube into the holder.
- Cut the tip of the caulk tube at a 45-degree angle to the desired bead size.
- Use a long, thin object (e.g., a wire or nail) to pierce the inner seal of the caulk tube.

6. Operation
6.1 Speed Regulation
The caulk gun features stepless speed regulation with 6 adjustable speeds. Use the speed adjustment dial located on the side of the gun to select the desired flow rate.
- Start with the lowest speed setting (e.g., 1) to test the flow and get accustomed to the tool.
- Increase the speed as needed for faster application or thicker materials.
- Refer to the table below for recommended application speeds for various surfaces:
| Application Surface | Recommended Speed (mm/min) |
|---|---|
| Large Wall & Floor Surface | 190-196 |
| Bathtub/Toilet Gap | 152-158 |
| Stainless Steel Sink | 115-121 |
| Acrylic Board | 77-86 |

6.2 Applying Caulk
- Hold the caulk gun firmly with both hands, if comfortable, or one hand for lighter tasks.
- Position the tip of the caulk tube at the starting point of your application.
- Press the trigger to begin dispensing caulk. Maintain a consistent speed and angle for a smooth bead.
- Release the trigger to stop the flow. The auto-retract system will prevent dripping.
- Utilize the 360° rotating cartridge holder to easily adjust the angle of application as you work around corners or irregular surfaces.
6.3 Using the Integrated LED Light
The LED light automatically illuminates when the trigger is pressed, providing visibility in poorly lit areas. This ensures precision even in challenging conditions.
6.4 Product Demonstration Video
6.5 Typical Applications

7. Maintenance
7.1 Cleaning
- After each use, remove the caulk tube and clean any excess sealant from the nozzle and the gun's cartridge holder.
- Use a damp cloth to wipe down the exterior of the tool. Do not use harsh chemicals or abrasive cleaners.
- Ensure no moisture enters the battery compartment or electrical components.
7.2 Battery Care
- Store batteries in a cool, dry place away from direct sunlight and extreme temperatures.
- Do not store batteries in a discharged state for extended periods. Recharge them periodically if not in use.
- If a battery is damaged or not holding a charge, dispose of it properly according to local regulations.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Gun does not operate | Battery not installed correctly or discharged. | Ensure battery is fully charged and properly seated. |
| Inconsistent caulk flow | Nozzle tip too small, inner seal not fully pierced, or speed setting too low. | Check nozzle tip size, ensure inner seal is pierced, adjust speed setting. |
| Caulk continues to drip after trigger release | Plunger rod mechanism obstructed or damaged. | Clean the plunger rod and ensure it moves freely. If damaged, contact support. |
| Battery not charging | Charger not connected, faulty charger, or faulty battery. | Check power connection. Try another outlet. If problem persists, contact support for charger/battery replacement. |
9. Specifications
| Feature | Detail |
|---|---|
| Brand Name | Seesii |
| Power Source | Battery (Lithium-Ion) |
| Battery Capacity | 2 x 2000mAh (12V) |
| Cartridge Capacity | 10oz / 300ml |
| Max Dispense Force | 4000N |
| Dispense Speed Range | 0 - 7.5mm/s (Stepless, 6 Adjustable Speeds) |
| Certification | CE |
| Use | Home DIY |
| Package Weight | 2.2 kg |
| Package Dimensions | 42 x 30 x 8 cm |


10. User Tips
- Battery Compatibility: This caulk gun is designed for its specific 12V 2000mAh Lithium-Ion batteries. While some users inquire about compatibility with other brands like Bosch Professional, it is generally recommended to use only the manufacturer-provided batteries and charger to ensure optimal performance and safety.
- Practice Makes Perfect: For first-time users, practice on scrap material to find the ideal speed setting and technique for a smooth, consistent bead before applying to your actual project.
- Proper Storage: Always remove the caulk tube and battery when storing the gun for extended periods. This prevents accidental discharge and prolongs battery life.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase documentation or visit the official SEESII website. Keep your proof of purchase for any warranty claims.