£18.28

About as cheap as it gets — within 5% of the all-time low it hit 1 month ago.

£18 today · all-time low £18 (Sep 2026) · usually the usual

Sentinel Leak Sealer 1L - Seals Minor Heating System Leaks

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Price History & Forecast

Grey patches = out of stock. Cheaper = lower on the chart. Hover for exact prices.

Last 42 days · 42 data points (no recent data)

Historical
Generating forecast…
£19.78 £17.77 £18.21 £18.65 £19.08 £19.52 £19.96 16 August 2026 26 August 2026 05 September 2026 15 September 2026 26 September 2026
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White, LS-12X1L-EXPA

Price data last checked 49 day(s) ago - refreshing...

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Price Distribution

Price distribution over 42 days • 3 price levels

Days at Price
Current Price
10 days 29 days 3 days 0 7 15 22 29 £18 £19 £20 Days at Price

Price Analysis

Most common price: £19 (29 days, 69.0%)

Price range: £18 - £20

Price levels: 3 different prices over 42 days

Description

Stop small leaks before they become major problems with Sentinel Leak Sealer. This 1L solution is specifically designed to seal minor leaks and weeping joints within indirect central heating systems. Whether you are dealing with small drips or slow seeps, this sealer provides an effective way to maintain your system's integrity without the need for immediate, invasive repairs. One of the standout benefits of this formula is its versatility. It is suitable for use with all metals, including aluminium, making it a reliable choice for various heating setups. You can use it with confidence knowing that it is designed to work without causing blockages in your heating system. This ensures that your heat distribution remains efficient while the leaks are addressed. For those looking to maintain a consistent heating environment, Sentinel Leak Sealer offers a practical approach to system maintenance. It is also compatible with other Sentinel products, allowing for a cohesive approach to your heating system care. Protect your investment and keep your heating system running smoothly with this dependable sealant.

Key Features

Seals all minor leaks and weeping joints in indirect central heating systems to prevent further damage.

Safe for all metal types, including aluminium, providing broad compatibility for different heating setups.

Formulated to ensure it will not cause blockages within your heating system during or after application.

Compatible with other Sentinel products for integrated heating system maintenance and care.

Provides an effective solution for managing small leaks without requiring major system overhauls.

Product Specifications

Colour
White
Size
1l
Domain
Amazon UK
Listed Since
28 January 2015

Barcode

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