# Soldering Flux Paste UNIPAK Unifix 3 bottle 250 g with brush (MPN 4540320)

**URL:** https://aio.lv/en/product--unipak-4540320--12052590
**Data updated:** 2026-03-12 19:35 (EET)
**Category:** Miscellaneous repair tools
**Manufacturer:** UNIPAK
**Manufacturer code:** 4540320
**EAN:** 5708923453204
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 26.49 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 21.89 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--unipak-4540320--12052590

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

UNIPAK Unifix 3 is a soldering flux paste supplied in a 250 g bottle with an attached brush for application. Designed for use with soft solders, it facilitates wetting and improves solder flow on metals during manual soldering and repair tasks. Suitable for electronics assembly, plumbing joints with soft solder, and general metal joining where flux paste application is required.

## Long description

UNIPAK Unifix 3 soldering flux paste comes in a 250 g bottle with an attached brush for direct, controlled application. Formulated for use with soft solders, the flux promotes wetting and improves solder flow on common metals used in electronics and plumbing. The brush cap allows precise dispensing without additional tools, making the product suitable for manual soldering, repair work and small-scale assembly tasks.
Advantages
The flux paste provides reliable activation and consistent performance during hand soldering and rework. Its paste consistency reduces dripping and run-off compared to liquid fluxes, enabling neat application on joints and small components. The integrated brush cap simplifies application and storage, while the formulation supports improved solder adhesion and reduced surface oxidation during heating.
Suitable for
 Electronics assembly and repair with soft solder
 Plumbing joints using soft solder
 Small metal joining and hobby soldering tasks
 Rework and maintenance of circuit boards and connections
Key specifications
 Form: paste
 Net content: 250 g
 Application method: brush-applied from integrated cap
 Intended solder type: soft solders
 Typical substrates: common metals used in electronics and plumbing
How to use
Ensure work surfaces and components are clean and free of grease before application. Open the bottle and use the attached brush to apply a thin, even layer of flux paste to the joint area. Heat the joint with the appropriate soldering iron or torch until the flux activates and solder flows to form a secure connection. After soldering, allow the joint to cool and remove any residual flux if required for the application and cleaning standards in use.
Usage recommendations
Use ventilation or local extraction when soldering to avoid inhalation of fumes. Select compatible soft solder and soldering temperature for the materials being joined. For electronic assemblies, consider cleaning residues according to manufacturer or industry cleanliness standards to prevent long-term corrosion or conductivity issues.

## FAQ

### How much does the UNIPAK Unifix 3 soldering flux paste 250 g cost, and is it available for purchase?

The price is 26.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 98 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All UNIPAK products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized UNIPAK service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12052590/67538680_large.webp