# Erko RTCK Heat Shrink Tubing with Adhesive, Thin-Walled, Black, 12-3 mm, 1 m

**URL:** https://aio.lv/en/product--erko-rtck12-3-c1--12466786
**Data updated:** 2026-05-18 09:34 (EEST)
**Category:** Electronics Accessories
**Manufacturer:** Erko
**Manufacturer code:** RTCK\_12-3-C/1
**EAN:** 5905912901306
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 11.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 9.91 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--erko-rtck12-3-c1--12466786

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The Erko RTCK thin-walled heat shrink tubing features an internal adhesive layer for reliable insulation and environmental sealing. Designed for electrical applications, it shrinks from 12 mm to 3 mm, providing a secure fit for cables and connectors. The black tubing offers excellent protection against moisture and mechanical stress, ensuring durable connections in various professional electrical installations.

## Long description

The Erko RTCK thin-walled heat shrink tubing is a professional-grade solution designed for reliable electrical insulation and environmental protection. Featuring an integrated internal adhesive layer, this tubing creates a robust, moisture-resistant seal upon shrinking, ensuring that cables and connectors remain protected from external elements. With a shrink ratio of 4:1, it transitions from an initial diameter of 12 mm down to 3 mm, allowing for a tight, secure fit over various cable geometries and irregular shapes.
Advantages
This heat shrink tubing offers superior mechanical strength and excellent resistance to moisture, chemicals, and environmental stress. The internal adhesive lining melts during the heating process to fill gaps and voids, providing an effective barrier against water ingress and corrosion. Its thin-walled construction maintains flexibility while offering high-performance insulation, making it an ideal choice for demanding electrical installations where durability and long-term reliability are essential.
Suitable for
Insulating electrical cable joints and splices
Sealing connectors against moisture and dust
Providing strain relief for cable terminations
Protecting wires in automotive and industrial environments
When it may not be suitable
This product is not intended for high-temperature environments exceeding its thermal rating or for applications requiring extreme mechanical abrasion resistance. It should not be used as a primary structural support for heavy cables or in areas exposed to continuous chemical immersion.
Key specifications
Shrink ratio: 4:1
Diameter range: 12 mm to 3 mm
Material: Thin-walled polyolefin with adhesive lining
Color: Black
Length: 1 meter
How to use
To use the Erko RTCK tubing, cut a piece to the desired length, ensuring it covers the area requiring insulation plus a small overlap. Slide the tubing over the cable or connector before making the connection. Apply heat evenly using a heat gun, starting from the center and moving toward the ends to allow the adhesive to flow and the tubing to shrink uniformly. Avoid overheating the material to prevent damage. Allow the connection to cool completely before handling to ensure the adhesive has set properly.
What to consider before purchase
Ensure the 12 mm initial diameter is sufficient to slide over your specific connector or cable assembly.
Verify that the 3 mm final diameter provides a tight enough fit for your cable gauge.
Confirm that the operating temperature of your application is within the limits of standard polyolefin heat shrink.
Usage recommendations
For the best results, use a professional heat gun with a temperature-controlled nozzle. Ensure the surface of the cable is clean and free of oils or debris before application to allow the internal adhesive to bond effectively.

## FAQ

### How much does the Erko RTCK Heat Shrink Tubing 12-3 mm cost, and is it available for purchase?

The price is 11.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 42 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 06.07.2026 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 Erko 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 Erko 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/12466786/68768981_large.webp