£42.03

About as cheap as it gets — within 5% of the all-time low it hit 3 months ago.

£42 today · all-time low £42 (Aug 2026) · usually £43

Bostik Bituminous Waterproofer for Roofs is a Premium Grade, Solvent-Based bituminous waterproofer for use on All Common Roofing Materials. 5 Litre, Colour: Black

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Price History & Forecast

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

Last 66 days · 66 data points (no recent data)

Historical
Generating forecast…
£43.42 £41.44 £41.87 £42.30 £42.74 £43.17 £43.60 11 August 2026 27 August 2026 12 September 2026 28 September 2026 15 October 2026
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Black, 30811918

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Price Distribution

Price distribution over 66 days • 2 price levels

Days at Price
Current Price
50 days · current 16 days 0 13 25 38 50 £42 £43 Days at Price

Price Analysis

Most common price: £42 (50 days, 75.8%)

Price range: £42 - £43

Price levels: 2 different prices over 66 days

Key Features

USES - Bostik Bituminous Waterproofer for Roofs is a premium grade, solvent-based bituminous waterproofer for use on all common roofing materials. It dries to form a tough, black waterproof coating and can be used as a water and moisture barrier or as a protection for metal.

USES - Immediate waterproofing

FOR USE ON MOST MATERIALS - For all common roof surfaces, it can be applied onto existing roofs or mastic asphalt, roofing felt, corrugated iron, fibre/cement, slates, lead, copper and zinc.

APPLICATION METHOD - Brush on application

Product Specifications

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