Includes all taxes
Model | MECHANIC UV223/559 High Activity Solder Flux |
UV223 Color | Brown |
UV559 Color | Milky |
Certification | RoHS compliant |
Feature | No-Clean |
Environmental | Lead-Free |
Function | Bright solder joints |
Insulation | High insulation resistance |
Application | For industrial use only |
Gross Weight | About 25.0g / set |
223 has higher viscosity.
559 has better wettability.
"High activity" is more sensitive to temperature compared to ordinary solder flux.
The solder flux should be kept at 10-25℃.
The solder flux should be used for 12 months.
The solder flux should not be placed in the sun.
Keep away from children.
Avoid contacting with eyes.
Avoid repeated contact with skin.
Use only with adequate ventilation.
In order to be cautious, in the operation, the smoke released by the solvent during operation should be avoided as much as possible, and the skin and mucous membrane tissues should not be contacted for too long. Avoid repeated breathing of vapor.
The copyright of all the above content belongs to the official MECHANIC store, infringement will be investigated!
Any forged, smeared, or modified picture are all piracy, and our company reserves the right to pursue its legal responsibility!
Products sold in unofficial stores are all pirated, for counterfeit products from other stores, our company cannot guarantee the authenticity and reliability of the quality of the products. If there are quality problems, our company will not be held responsible!
If you find that fake and inferior products are sold on the AliExpress platform, you can also feedback to our company for processing, let us work together to maintain market order!

This flux has stable performance and low volatility, long use cycles, non-toxic, no irritant smell.


The residue is colorless and transparent, does not affect the detection, disposable and excellent cleaning performance. Rosin residue is non-corrosive, non-conductive, moisture resistant and fungus resistant.


Flux flows smoothly for consistently secure and uniform solder connections with no mess.


Special formulation designs deliver excellent rheology and high viscosity retention ability even after long open time.


Suitable for a variety of welding environments, a wide range of applications, with high compatibility.




1* MECHANIC 10cc UV Series Solder Flux (Model as your choice.)
1* Piston
1* Needle



We accept AliPay, West Union, TT and all major credit cards (which must pass secure payment check process).
Awaiting payment order need to be paid within 3 days, or it will be closed automatically by the AliExrpess.
Wholesale and drop shipping are both welcomed. For wholesale, we'll offer discount or free express shipping which only takes 7-15 days to arrive. For drop shipping, we could send the goods to your customers directly and won't leave any information about us if you'd like to.
12 months manufacture's limited warranty for defective products (Excluding man-made damage to the product/misused after receipt). Accessories come with a 3-month warranty and defective items MUST BE reported and returned within the warranty period.
If you want to return the defective product to us, please first contact us and send us the picture or video of the defective product, we'll discuss the method to solve this problem with you. (The buyer should return the product in the original conditions to us and should bear the shipping costs for return.)


WORLDWIDE SHIPPING! As the AliExpress needs 6-12 hours for payment verification, therefore, we will ship the parcel out within 48 hours after the payment cleared. (All orders will be processed timely after the payment verification.)
Physical address is necessary, we can only ship the parcel to confirmed shipping address, therefore your order address MUST MATCH your shipping address. (Do not leave us your PO BOX address, as we can't deliver the parcel to it.)
Do not authorize the shipping company to leave your package at your door at any circumstances, because this often causes packages lost.
Transport time may vary, particularly during the holiday season, but it is mainly dependent on the logistics method you choose, we strongly recommend that you choose a logistics method which can offer you with whole tracking information, so that the transport process will be safer and more accurate, such as "AliExpress Standard Shipping" or "CaiNiao Standard Shipping for Special Goods".
When the tracking information shows "Parcel arrives in destination country", the logistics company or your local post office maybe make a call to ask buyer to sign it, please don't missed. If the package is not processed within the specified time, they will return or destroy it, this is very important.


Buyers' timely confirmation (within 3 days) after receiving the package will be highly appreciated! We maintain high standards of excellence and strive for 100% customer satisfaction!
Since your feedback is very important to our business development, we sincerely invite you to leave the positive feedback (5 stars) for us if you are satisfied with our product and service.
Please kindly Do Not leave 1-3 low scores on logistics transportation, because the oversea shipping will be affected by many factors, such as customs processing, post-strike etc.
Subscribe our store is the biggest affirmation to us, if you can share our product listing to your social app, that would be awesome.
Feedback with pictures (if you could leave the feedback with video, that would be great) will help more people who wants to buy this product.
Payment Policy – BILLIONS BIRDS
At BILLIONS BIRDS, we are committed to providing a safe, secure, and seamless payment experience for our customers.
1. Accepted Payment Methods
We accept the following payment options:
Major Credit & Debit Cards (Visa, MasterCard, American Express)
Secure Online Payment Gateways (such as PayPal, Stripe, or other providers available at checkout)
Any additional payment methods displayed during checkout
All payments must be completed in full at the time of purchase.
2. Secure Transactions
All transactions are processed through encrypted and secure payment systems to protect your personal and financial information. We do not store your full payment details on our servers.
3. Currency
Prices are displayed in the currency indicated on the website. If you are purchasing from another country, your bank may apply currency conversion fees.
4. Order Confirmation
Once your payment has been successfully processed, you will receive an order confirmation email containing your purchase details.
5. Failed or Declined Payments
If your payment is declined, please verify your billing information or contact your bank. Orders will only be processed after successful payment confirmation.
6. Fraud Prevention
BILLIONS BIRDS reserves the right to cancel or refuse any order if fraud or unauthorised activity is suspected.
Delivery Policy – BILLIONS BIRDS
At BILLIONS BIRDS, we are dedicated to delivering your orders safely and efficiently.
1. Order Processing
All orders are processed within 1–3 business days after payment confirmation. Orders are not processed or shipped on weekends or public holidays.
2. Shipping Times
Estimated delivery times vary depending on your location:
Domestic Shipping: 3–7 business days
International Shipping: 7–15 business days
Please note that delivery times are estimates and may vary due to customs procedures, carrier delays, weather conditions, or other unforeseen circumstances.
3. Shipping Costs
Shipping fees are calculated at checkout based on your location and selected shipping method. Any customs duties, taxes, or import fees are the customer's responsibility.
4. Tracking Information
Once your order has been shipped, you will receive a confirmation email with tracking details (if available) so you can monitor your package.
5. Delivery Issues
If your order is delayed, lost, or arrives damaged, please contact us within 7 days of the expected delivery date. We will work with the shipping carrier to resolve the issue as quickly as possible.
6. Incorrect Shipping Information
Customers are responsible for providing accurate shipping details at checkout. BILLIONS BIRDS is not responsible for orders shipped to incorrect addresses provided by the customer.
Refund Policy – BILLIONS BIRDS
At BILLIONS BIRDS, customer satisfaction is our top priority. If you are not completely satisfied with your purchase, we’re here to help.
1. Return Eligibility
You may request a return within 14 days of receiving your order. To qualify for a return:
The item must be unused, unworn, and in the same condition as received.
The item must be in its original packaging.
Proof of purchase (order confirmation or receipt) is required.
Certain items may not be eligible for return, including clearance items, gift cards, or personalised/custom products.
2. Non-Refundable Items
The following items are non-refundable:
Final sale or discounted items
Gift cards
Items damaged due to misuse, negligence, or improper care
3. Return Process
To initiate a return, please contact our customer support team with your order number and reason for return. If your return is approved, you will receive instructions for returning the item.
Unless the item is defective or incorrect, customers are responsible for return shipping costs.
4. Refund Processing
Once we receive and inspect your returned item:
We will notify you of the approval or rejection of your refund.
If approved, the refund will be issued to your original payment method within 5–10 business days.
Please note that banks or payment providers may require additional time to process refunds.
5. Damaged or Incorrect Items
If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery and provide clear photos of the product and packaging. We will arrange a replacement or full refund at no additional cost.
6. Late or Missing Refunds
If you have not received your refund:
Check your bank account again.
Contact your credit card company or payment provider.
If the issue persists, don't hesitate to contact our support team for assistance.
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