# Castolin LUT TWARDY CU FLAM RB 5286 CUP 5% AG - 500×2 mm soldering rod, 200 g

**URL:** https://aio.lv/en/product--castolin-754815--12009429
**Data updated:** 2026-03-11 20:43 (EET)
**Category:** Miscellaneous repair tools
**Manufacturer:** Castolin
**Manufacturer code:** 754815
**EAN:** 3509350010846
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 93.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 77.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--castolin-754815--12009429

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Castolin LUT TWARDY CU FLAM RB 5286 CUP 5% AG is a 200 g soldering rod composed primarily of copper-based alloy with 5% silver. Supplied as 500×2 mm rods, it is designed for brazing and soldering applications requiring enhanced joint strength, thermal conductivity and corrosion resistance. Suited for metal repair, HVAC, plumbing and industrial maintenance.

## Long description

Castolin LUT TWARDY CU FLAM RB 5286 CUP 5% AG is a copper-based brazing and soldering rod with 5% silver content, supplied as 500×2 mm rods in a 200 g package. Formulated for creating strong, conductive and corrosion-resistant joints, this alloy is intended for tasks that require improved mechanical strength and thermal conductivity compared with plain copper filler metals. The rod is appropriate for use with flame and torch brazing techniques on compatible base metals and for repair and maintenance work in mechanical, HVAC and plumbing systems.
Advantages
The 5% silver content increases wetting and flow characteristics, producing sound fillets with good capillary action and consistent joint penetration. The copper-based matrix provides high thermal and electrical conductivity while maintaining resistance to corrosion in typical service environments. Supplied in uniform 500×2 mm rods, the product offers predictable feed and handling during manual brazing operations and reduces the need for frequent rod changes during medium-scale jobs.
Suitable for
 Repair and joining of copper, brass and compatible copper alloys
 HVAC and refrigeration piping, heat exchangers and condensers
 Plumbing installations and service work
 Industrial maintenance where mechanically strong, conductive joints are required
Key specifications
 Alloy type: copper-based filler with 5% silver
 Form: solid rod
 Rod dimensions: 500 × 2 mm
 Net weight: 200 g per pack
 Application method: flame/torch brazing and manual soldering techniques
 Properties: improved wetting, good capillary flow, high thermal and electrical conductivity
How to use
Clean base metal surfaces to remove oxides, oils and contaminants before brazing. Select an appropriate flux and apply it to the joint area if required by the base metals and the chosen brazing process. Heat the assembly uniformly with a suitable torch until the joint reaches the recommended brazing temperature for the alloy system; touch the molten filler rod to the heated joint so that capillary action draws the alloy into the gap. Allow the assembly to cool gradually and remove any residual flux or oxidation products according to the flux manufacturer’s guidance.
Usage recommendations
Use appropriate personal protective equipment and ventilation when flame brazing. Verify compatibility of the filler with the base metals and follow specified brazing temperatures for silver-bearing copper fillers. Store rods in a dry environment to avoid surface contamination that can impair wetting and flow.

## FAQ

### How much does the Castolin LUT TWARDY CU FLAM RB 5286 soldering rod cost, and is it available for purchase?

The price is 93.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 03.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Castolin LUT TWARDY CU FLAM RB 5286 soldering rod be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Castolin 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 Castolin 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/12009429/67492353_large.webp