# Firestop putty K-flex K-Fire Putty O15mm 5×20 cm — intumescent seal for pipe and cable penetrations

**URL:** https://aio.lv/en/product--k-flex-850vr020690--11797234
**Data updated:** 2026-03-09 07:30 (EET)
**Category:** Decorating Materials
**Manufacturer:** K-flex
**Manufacturer code:** 850VR020690
**EAN:** 8027409955801
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 36.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 30.16 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--k-flex-850vr020690--11797234

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

K-Fire Putty by K-flex is a firestop putty sheet sized 5×20 cm with a nominal O15mm thickness dimension. Designed as an intumescent sealing material, it is used to seal pipe and cable penetrations, service openings and small gaps to restore and maintain fire-resistance of walls and floors. Suitable for quick on-site application where flexible, compressible firestopping is required.

## Long description

K-Fire Putty O15mm is an intumescent firestop putty sheet manufactured by K-flex, supplied in 5×20 cm dimensions with a nominal thickness of 15 mm. The material is formulated to seal small penetrations, service openings and gaps around pipes and cables in walls and floors, restoring the integrity of fire-resistance barriers. Its compressible, flexible structure allows simple on-site fitting into irregular openings and around round or flat services without the need for special tools.
Advantages
The putty expands when exposed to heat, forming an insulating char that helps prevent the passage of fire, smoke and hot gases through openings. Its compressible nature ensures good contact with uneven surfaces and different service profiles, improving the seal in busy installation areas. The sheet format and moderate thickness make it convenient for fast installation and retrofitting in existing constructions.
Suitable for
Sealing pipe penetrations in masonry and lightweight partitions
Sealing cable entries and cable trays where small gaps remain
Restoring fire resistance around small service openings in floors and walls
On-site retrofitting and maintenance of fire seals in electrical and mechanical installations
Key specifications
Form: intumescent putty sheet
Dimensions: 5 × 20 cm
Nominal thickness: 15 mm
Material property: compressible and flexible for tight fitting
Function: passive firestop for sealing small openings around services
How to use
Measure the penetration or gap and cut the putty sheet to the required size with a knife or scissors. Press the cut piece firmly into the opening ensuring continuous contact with the substrate and services; the material should form a tight fit without gaps. For irregular shapes, compress and shape the putty by hand to achieve full coverage. No special primers or adhesives are typically required, but follow project-specific firestop system instructions and compatibility checks with surrounding materials.
Usage recommendations
Inspect installed seals after fitting to confirm complete contact around services and make sure the putty is not left exposed to conditions outside its intended use without appropriate protection. Use this product as part of an approved firestop solution and consult project firestop specifications or a fire-safety professional for complex penetrations or where system listings are required.

## FAQ

### How much does the K-flex K-Fire Putty O15mm 5×20 cm firestop putty cost, and is it available for purchase?

The price is 36.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 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 07.07.2026 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 K-flex 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 K-flex 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/11797234/67198123_large.webp