Unbranded 21V High Power Electric Caulk Gun Max Cordless Caulking Gun with Lithium Battery
Unbranded 21V High Power Electric Caulk Gun Max Cordless Caulking Gun with Lithium Battery
Description
Are you tired of the inefficiency and fatigue of manual caulking guns? Come and upgrade your tools! This cordless caulking gun is made of high-quality materials, has high efficiency, and is suitable for various types of glue usage. Its copper motor has a large and stable thrust, which can assist you in completing various adhesive work. Come and take this good tool and helper home!
Key Features
High Efficiency: Its powerful copper motor can guarantee a maximum thrust of 8000N, with stable output, uniform glue output, and no agglomeration. Compared to the manual caulking gun, it only needs to be filled with caulking material and pulled the trigger. The longer gun tube also allows you to work without bending down, saving you a lot of time and energy.
Build to Last: The exquisite aluminum, copper, plastic, and blackening treatment make the product wear-resistant, corrosion-resistant, and sturdy, so it can withstand the test of time well.
Strong Endurance: Two 2000mah lithium batteries with battery indicator lights allow you to apply 80-100 sticks of glue at once (each), and require less charging time (each is 2 hours), so you can use them alternately without frequent charging, improving efficiency.
Safe to Use: The 100-250V wide voltage, overcurrent protection, undervoltage protection, over temperature protection, and charge-discharge protection, as well as a lever lock, can effectively ensure safety during operation, so you can use it with confidence.
Easy to Carry and Store: A large capacity storage box with buckles and grooves can help you organize various accessories in an orderly manner, making it easy for you to carry and effectively preventing item loss.
Good Adaptability: With corresponding push plates and pistons, it can be used together with soft or hard glue. The common glass adhesive, silicone, and structural adhesive can be adapted and this item is not easily clamped with adhesive tape.
Elaborate Design: At the moment of releasing the switch, the glue push rod will immediately retract to automatically glue back, avoiding unnecessary glue dripping and causing waste. Its automatic pressure relief function effectively utilizes the pressure relief principle and can effectively prevent glue overflow.
Simple and Convenient: 6-speed adjustable speed can optimize flow rates of 0-14mm/s or 0-33in/min. The variable trigger can also control the flow rate, allowing you to better match the speed with the application. The cruise control button can achieve uniform glue release for a long time, while the convenient 360 ° rotation of the gun tube can provide better performance at corners. The replacement of the adhesive head is also very simple and convenient.
Details
Red Line Prompt: The red line at the end of the rod can effectively remind you not to exceed the stop line during gluing to avoid damaging the machine.
Comfortable Handle: The ergonomic handle wrapped in silicone provides an anti-slip and shock absorption effect, providing maximum comfort and effectively reducing fatigue caused by long hours of work.
Application
This product can be widely used in the home, curtain wall exterior wall, sunlight room, decoration industry, construction sites, and other fields for roof leak repair, door and window and bathroom gluing, tile seam beautification, wall seam repair, bottom plate bonding, and so on.
How to Install
- Install the corresponding piston.
- Press and hold the clutch button to pull out the push rod.
- Install the cartridge and tighten it.
- Put the glue(not included) into the cartridge.
- Install the nozzle and tighten the aluminum cover.
- Install the battery and complete the installation.
Specifications
Model: KMZ-21
Material: Plastic, Copper, Aluminum, Silicone
Surface Treatment: Blackening
Plug: US Standard
Color: Black, Red
Power Source: Battery Powered
Adapter Model: HSZC-2188
Batteries Included: Yes
Battery Type: 2*21V, 2Ah Lithium Batteries(Included)
Input: AC100-250V, 47-63Hz, 0.8A
Output: 21VF-98VF=1A
Gluing Depth: 50mm/1.97in
Thrust: 0-8000N
Material Range: 300ml/0.08gal Hard Adhesive, 600ml/0.16gal Soft Adhesive
Rubber Nozzle Opening Diameter: >12mm/0.47in
Speed: 30-70s/Stick of Glue
Barrel Inner Diameter: 5cm/1.96in
Barrel Outer Diameter: 5.5cm/2.16in
Speed Control Gear: 1-6
Number of Items: 1
Gross Weight: 3.6kg/7.9lbs
Product Length: 60cm/23.62in
Package Size: 62*32*11cm/24*12.5*4.3in
Package Included
1*Cordless Caulking Gun
2*Lithium Batteries
1*Adapter
1*Professional Toolbox
1*English Manual
All Accessories for Assembly
Notes
- Please note that glue is not included.
- Please read the manual carefully and pay attention to the safety precautions inside. Please keep the tool away from children. Please never point it at anyone.
- When purchasing an electric glue gun, please choose the one that is suitable for your glue application. Slow down the speed of the glue nozzle when it is small, and speed up the speed of the glue nozzle when it is large.
- When the temperature is below 68°F, please be sure to heat the adhesive in hot water at 140-158°F for ten minutes. The electric glue gun has a high thrust. To prevent tube explosion and glue leakage, we have set up a protection program. When the thrust is too high, it will automatically retreat. Please do not forcefully apply glue.
- If there is glue on the screw or rack raceway, it should be promptly wiped to prevent the glue from entering the machine body (a small amount of alcohol can be dipped in a cloth to apply). After a period of use, a little butter can be applied to the screw roller track for maintenance (do not add liquid lubricants such as engine oil).
- Please allow the slight color difference caused by the shooting light and 1-3cm error due to manual measurement, and make sure you do not mind before you order.
- We maintain high standards of excellence and strive for hundred percent customer satisfaction. Feedback is very important to us. We hope that you contact us immediately before you give neutral or negative feedback, so that we can address your concerns. It is impossible to address issues if we do not know about them!
Brand: | Unbranded |
---|---|
Isin: | IYQCLHXGOUQV |

IBspot Buyer Protection
Shop confidently on IBspot, receive your item as described or your money back for eligible orders. Learn Program Terms

GUARANTEED SAFE CHECKOUT
-
MONEY BACK GUARANTEE
30 days money back guarantee, no additional fee charged.
-
EXCELLENT SUPPORT
We provide 24/7 online customer support via email.
-
Fast Shipping
One week domestic shipping. Global delivery to the US in 2 weeks.
Description
Are you tired of the inefficiency and fatigue of manual caulking guns? Come and upgrade your tools! This cordless caulking gun is made of high-quality materials, has high efficiency, and is suitable for various types of glue usage. Its copper motor has a large and stable thrust, which can assist you in completing various adhesive work. Come and take this good tool and helper home!
Key Features
High Efficiency: Its powerful copper motor can guarantee a maximum thrust of 8000N, with stable output, uniform glue output, and no agglomeration. Compared to the manual caulking gun, it only needs to be filled with caulking material and pulled the trigger. The longer gun tube also allows you to work without bending down, saving you a lot of time and energy.
Build to Last: The exquisite aluminum, copper, plastic, and blackening treatment make the product wear-resistant, corrosion-resistant, and sturdy, so it can withstand the test of time well.
Strong Endurance: Two 2000mah lithium batteries with battery indicator lights allow you to apply 80-100 sticks of glue at once (each), and require less charging time (each is 2 hours), so you can use them alternately without frequent charging, improving efficiency.
Safe to Use: The 100-250V wide voltage, overcurrent protection, undervoltage protection, over temperature protection, and charge-discharge protection, as well as a lever lock, can effectively ensure safety during operation, so you can use it with confidence.
Easy to Carry and Store: A large capacity storage box with buckles and grooves can help you organize various accessories in an orderly manner, making it easy for you to carry and effectively preventing item loss.
Good Adaptability: With corresponding push plates and pistons, it can be used together with soft or hard glue. The common glass adhesive, silicone, and structural adhesive can be adapted and this item is not easily clamped with adhesive tape.
Elaborate Design: At the moment of releasing the switch, the glue push rod will immediately retract to automatically glue back, avoiding unnecessary glue dripping and causing waste. Its automatic pressure relief function effectively utilizes the pressure relief principle and can effectively prevent glue overflow.
Simple and Convenient: 6-speed adjustable speed can optimize flow rates of 0-14mm/s or 0-33in/min. The variable trigger can also control the flow rate, allowing you to better match the speed with the application. The cruise control button can achieve uniform glue release for a long time, while the convenient 360 ° rotation of the gun tube can provide better performance at corners. The replacement of the adhesive head is also very simple and convenient.
Details
Red Line Prompt: The red line at the end of the rod can effectively remind you not to exceed the stop line during gluing to avoid damaging the machine.
Comfortable Handle: The ergonomic handle wrapped in silicone provides an anti-slip and shock absorption effect, providing maximum comfort and effectively reducing fatigue caused by long hours of work.
Application
This product can be widely used in the home, curtain wall exterior wall, sunlight room, decoration industry, construction sites, and other fields for roof leak repair, door and window and bathroom gluing, tile seam beautification, wall seam repair, bottom plate bonding, and so on.
How to Install
- Install the corresponding piston.
- Press and hold the clutch button to pull out the push rod.
- Install the cartridge and tighten it.
- Put the glue(not included) into the cartridge.
- Install the nozzle and tighten the aluminum cover.
- Install the battery and complete the installation.
Specifications
Model: KMZ-21
Material: Plastic, Copper, Aluminum, Silicone
Surface Treatment: Blackening
Plug: US Standard
Color: Black, Red
Power Source: Battery Powered
Adapter Model: HSZC-2188
Batteries Included: Yes
Battery Type: 2*21V, 2Ah Lithium Batteries(Included)
Input: AC100-250V, 47-63Hz, 0.8A
Output: 21VF-98VF=1A
Gluing Depth: 50mm/1.97in
Thrust: 0-8000N
Material Range: 300ml/0.08gal Hard Adhesive, 600ml/0.16gal Soft Adhesive
Rubber Nozzle Opening Diameter: >12mm/0.47in
Speed: 30-70s/Stick of Glue
Barrel Inner Diameter: 5cm/1.96in
Barrel Outer Diameter: 5.5cm/2.16in
Speed Control Gear: 1-6
Number of Items: 1
Gross Weight: 3.6kg/7.9lbs
Product Length: 60cm/23.62in
Package Size: 62*32*11cm/24*12.5*4.3in
Package Included
1*Cordless Caulking Gun
2*Lithium Batteries
1*Adapter
1*Professional Toolbox
1*English Manual
All Accessories for Assembly
Notes
- Please note that glue is not included.
- Please read the manual carefully and pay attention to the safety precautions inside. Please keep the tool away from children. Please never point it at anyone.
- When purchasing an electric glue gun, please choose the one that is suitable for your glue application. Slow down the speed of the glue nozzle when it is small, and speed up the speed of the glue nozzle when it is large.
- When the temperature is below 68°F, please be sure to heat the adhesive in hot water at 140-158°F for ten minutes. The electric glue gun has a high thrust. To prevent tube explosion and glue leakage, we have set up a protection program. When the thrust is too high, it will automatically retreat. Please do not forcefully apply glue.
- If there is glue on the screw or rack raceway, it should be promptly wiped to prevent the glue from entering the machine body (a small amount of alcohol can be dipped in a cloth to apply). After a period of use, a little butter can be applied to the screw roller track for maintenance (do not add liquid lubricants such as engine oil).
- Please allow the slight color difference caused by the shooting light and 1-3cm error due to manual measurement, and make sure you do not mind before you order.

- We maintain high standards of excellence and strive for hundred percent customer satisfaction. Feedback is very important to us. We hope that you contact us immediately before you give neutral or negative feedback, so that we can address your concerns. It is impossible to address issues if we do not know about them!


- Please Note: Shipment within one working day
- Tips~: Fast shipping
- Brand: Unbranded
- Type: Caulking Gun
- Model: KMZ-21
- Material: Plastic, Copper, Aluminum, Silicone
- Surface Treatment: Blackening
- Plug: US Standard
- Number of Pieces: 1
- Color: Black, Red
- Power Source: Battery Powered
- Adapter Model: HSZC-2188
- Batteries Included: Yes
- Battery Type: 2*21V, 2Ah Lithium Batteries(Included)
- Input: AC100-250V, 47-63Hz, 0.8A
- Output: 21VF-98VF=1A
- Gluing Depth: 50mm/1.97in
- Thrust: 0-8000N
- Material Range: 300ml/0.08gal Hard Adhesive, 600ml/0.16gal Soft Adhesive
- Rubber Nozzle Opening Diameter: 12mm/0.47in
- Speed: 30-70s/Stick of Glue
- Barrel Inner Diameter: 5cm/1.96in
- Barrel Outer Diameter: 5.5cm/2.16in
- Speed Control Gear: 1-6
- Gross Weight: 3.6kg/7.9lbs
- Product Length: 60cm/23.62in
- Package Size: 62*32*11cm/24*12.5*4.3in
- Features: High Efficiency
- Country/Region of Manufacture: China
- MPN: Does not apply
- UPC: Does not apply
Processing Time
- We process and ship orders Monday through Friday, excluding holidays.
- Most orders are processed within 1–3 business days, depending on product availability.
- Processing time does not include delivery time, which varies based on your location and the product’s shipping origin.
Shipping Coverage
We currently ship to addresses within the United States only.
Products may ship from:
- Our U.S. warehouses, or
- Our international fulfillment centers (including Korea, Japan, China, Australia, Mexico, Canada, the United Kingdom, and the EU).
Each product page clearly displays the “Ships From” location before checkout.
Shipping Methods & Estimated Delivery
Shipping Method | Estimated Delivery | Cost |
---|---|---|
Free Shipping (US) | 5–10 business days | Free, available on eligible items |
Standard Shipping (US to US by Item) | 5–10 business days | $6.50 for the first item, $3.00 each additional |
Standard Shipping (From US Warehouse by Weight) | 3–7 business days | Starts at $6.50, increasing by $2 for every additional 4 oz (0.25 lb) up to 1 lb, then by $4 for each additional pound beyond 1 lb. |
Extended Delivery (Ships from Overseas Warehouse) | 10–15 business days | $14.50 for the first item, $4.00 each additional |
Shipping costs vary by product weight, quantity and origin. Exact rates and delivery estimates are displayed on each product page and confirmed during checkout.
Free Shipping
We offer free standard shipping on select products or during promotional periods. Availability of free shipping will be displayed on the product page and at checkout.
Carriers
We primarily use USPS and UPS for U.S. deliveries. Items shipped from international warehouses may be handled by partner carriers depending on the country of origin.
Import Duties & Taxes
All import duties and taxes for goods imported into the United States are included in the product price. There are no hidden fees or additional charges at checkout.
Tracking & Notifications
Every order is fully trackable. You will receive a tracking number via email once your order ships. If your order ships in multiple packages, each package will have its own tracking number. If you don’t receive a shipping confirmation immediately, your order is still being processed and will arrive within the estimated timeframe shown at checkout.
You can track your shipment anytime using the Track Your Order page on our website.
Order Changes & Cancellations
If you need to modify or cancel an order, please contact our customer support team as soon as possible. Orders can only be canceled before they ship. Once shipped, cancellations are not possible, but you may request a return after the item is delivered.
Contact: support@ibspot.com
Item Not Received
If your tracking number shows “Delivered” but you haven’t received your package:
- Check with your local USPS or UPS office.
- Confirm that the shipping address provided was correct.
- If the issue remains unresolved, contact support@ibspot.com for assistance.
Damaged or Lost Parcels
If your package arrives damaged or fails to arrive, please contact us immediately. For deliveries to P.O. boxes, ibspot is not responsible for damage caused by weather, temperature, or theft.
Customer Support
For any questions about shipping, tracking, or delivery, our customer support team is here to help.
Email: support@ibspot.com
We’re always happy to help.
Please read our policy carefully before making a purchase.
We aim to ensure every customer has a smooth and transparent experience with ibspot.com.
Order Cancellation Policy
Customers may request to cancel an order before it has been shipped.
Once the package has been shipped, cancellations are no longer possible; however, you may still request a return after receiving your order.
How to Request a Cancellation
You can contact us through:
-
Email: support@ibspot.com
-
Contact Form: Submit a request through our Contact Us page
Please submit your cancellation request as soon as possible after placing the order to allow us to process it before shipment.
Return Policy
We accept returns for most items within 30 days of delivery for a full refund.
To be eligible for a return:
-
The item must be unused, in the same condition as received, and in its original packaging.
-
A tracking number must be provided to confirm the return shipment.
Non-Returnable Items
Certain products cannot be returned, including:
-
Perishable goods (for example, food, flowers, newspapers, magazines)
-
Intimate or sanitary goods
-
Hazardous materials or flammable liquids/gases
-
Gift cards
-
Downloadable software
-
Some health and personal care items
Partial Refunds (If Applicable)
Partial refunds may be granted in specific situations, such as:
-
Books with obvious signs of use
-
Opened CDs, DVDs, software, or vinyl records
-
Items not in their original condition, damaged, or missing parts not due to our error
-
Items returned more than 30 days after delivery
How to Return an Item
To initiate a return, please contact us at support@ibspot.com with your order number and details about the product you wish to return.
Our team will provide you with return instructions and a prepaid return label.
Shipping Cost for Returns
Please contact us before returning any item.
We will provide a free return shipping label.
If a return is sent back without prior contact or without our provided label, we cannot be held responsible for return shipping costs.
For items valued over $75, we recommend using a trackable shipping service or purchasing shipping insurance.
We cannot guarantee that we will receive your returned item if shipped independently.
Refund Processing
Once your return is received and inspected:
-
In-store returns are refunded to the original form of payment or issued as a gift card.
-
Mail-in returns using our prepaid label are refunded to the original payment method within 3–5 business days after we receive your return.
Please allow:
-
5–7 business days for the return to reach our Returns Center.
-
An additional 3–10 business days for your bank to post the refund to your account.
Damages, Issues & Claims
Please inspect your order immediately upon receipt.
If you receive a defective, damaged, or incorrect item, contact us right away at support@ibspot.com.
We’ll evaluate the issue promptly and make it right.
Product Claims
Before purchasing, please review product details carefully.
If there is a problem with your order upon arrival, visit our Support Center or contact us directly to arrange return shipping or replacement.
Exchanges
We do not process direct exchanges.
The fastest way to get what you need is to return the original item and place a new order once your return is accepted.
Return Address
IBSPOT Return Center
15 Sawmill Ln
Dover Plains, NY 12522
United States
Customer Support
Our support team is available 24/7 to assist with cancellations, returns, or general inquiries.
Email: support@ibspot.com
Contact Form: Contact Us page
Oops!
Sorry, it looks like some products are not available in selected quantity.