# Erko RTCK 12-4mm Thin-Walled Heat Shrink Tubing with Adhesive, Black, 1m

**URL:** https://aio.lv/en/product--erko-rtck12-4-c1--12453970
**Data updated:** 2026-05-18 02:41 (EEST)
**Category:** Tool kits and accessories
**Manufacturer:** Erko
**Manufacturer code:** RTCK\_12-4-C/1
**EAN:** 5905912866186
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 8.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 7.02 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--erko-rtck12-4-c1--12453970

## 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 12-4mm thin-walled heat shrink tubing features an internal adhesive layer for reliable insulation and environmental sealing. Designed for electrical connections, wire protection, and cable bundling, this black tubing shrinks from 12mm to 4mm. It provides excellent mechanical protection and moisture resistance, making it suitable for professional electrical installations and repairs.

## Long description

The Erko RTCK 12-4mm thin-walled heat shrink tubing is a high-quality solution designed for electrical insulation and environmental protection. Featuring an integrated internal adhesive layer, this tubing ensures a secure, moisture-resistant seal once heat is applied. With a shrink ratio of 3:1, it effectively reduces its diameter from 12mm to 4mm, providing a tight fit around cables, connectors, and splices. Its durable construction offers robust mechanical protection, ensuring long-term reliability in various electrical applications.
Advantages
The primary benefit of this heat shrink tubing is its dual-wall design, which combines a flexible outer jacket with a heat-activated adhesive lining. This combination not only insulates electrical components but also creates a permanent barrier against moisture, dust, and chemicals. The material is highly resistant to mechanical stress, preventing abrasion and wear on sensitive wiring. Its ease of installation and ability to conform to irregular shapes make it an essential tool for maintaining the integrity of electrical systems.
Suitable for
Insulating electrical wire connections and splices
Providing environmental sealing for cable joints
Bundling and organizing electrical cables
Protecting wires from mechanical abrasion and moisture
Professional electrical installations and automotive repairs
When it may not be suitable
This tubing is not intended for use in environments with extreme, continuous heat exposure that exceeds the material's thermal rating. It should not be used for high-voltage power transmission lines or applications requiring specialized fire-resistant or halogen-free materials unless specified for those conditions.
Key specifications
Shrink ratio: 3:1
Initial diameter: 12mm
Shrunk diameter: 4mm
Material: Thin-walled polyolefin with adhesive
Color: Black
Length: 1 meter
How to use
To use the Erko RTCK tubing, first cut a piece to the required length, ensuring it covers the area to be protected with some overlap on both sides. Slide the tubing over the cable or connection. Using a heat gun or another appropriate heat source, apply heat evenly around the circumference of the tubing, starting from the center and moving toward the ends. As the tubing shrinks, the internal adhesive will melt and flow to fill gaps, creating a secure seal. Allow the tubing to cool completely before handling or applying mechanical stress.
What to consider before purchase
Ensure the initial 12mm diameter is sufficient to slide over your specific connector or cable bundle
Verify that the 4mm shrunk diameter will provide a tight fit on the smallest part of your assembly
Confirm the length of 1 meter is adequate for your project requirements
Check that the operating temperature range is compatible with your specific environment
Usage recommendations
For the best results, always clean the surface of the cable or connector before applying the tubing to ensure the adhesive bonds correctly. Avoid overheating the material, as this may cause it to become brittle or lose its structural integrity.

## FAQ

### How much does the Erko RTCK 12-4mm Heat Shrink Tubing with Adhesive cost, and is it available for purchase?

The price is 8.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 127 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/12453970/68756486_large.webp