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Sherwin Williams ISOFLEX Liquid Rubber Black 2.1L, Waterproof Sealant Coating, Flexible Roof & Gutter Repair, Liquid Waterproofing Membrane

Name: Sherwin Williams ISOFLEX Liquid Rubber Black 2.1L, Waterproof Sealant Coating, Flexible Roof & Gutter Repair, Liquid Waterproofing Membrane
Brand: IsoFlex
SKU: DEC-085944
Price: 52.07 GBP
Availability: InStock

Brand IsoFlex See the full IsoFlex range

SKU DEC-085944

Product code: DC085944
EAN: 5010214567010

£52.07

inc VAT£43.39 ex VAT

Lead time: 2-8 working days

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Specifications

Capacity (litres)	2.1
Colour	Black
Material	Rubber

Description

Product Overview

Sherwin Williams ISOFLEX Liquid Rubber Black 2.1L is a flexible waterproof sealant coating designed to help seal and protect surfaces against water ingress. Suitable for maintenance and repair work, it creates a durable, elastic barrier that helps prevent leaks and weather-related damage. Ideal for trade and DIY users who need a reliable liquid waterproofing solution.

Key Features

Flexible liquid rubber coating – helps bridge minor movement and cracking to maintain a watertight seal.
Waterproof barrier protection – designed to stop leaks and protect substrates from moisture damage.
Black finish – provides a neat, uniform look for external repairs and maintenance areas.
2.1L size for practical coverage – ideal for small-to-medium repair tasks without excessive waste.

Use Case / Application

Designed for waterproofing and sealing tasks where a brushable or spreadable rubberised coating is required. Common applications include:

Roof maintenance and leak repairs on vulnerable areas
Gutter and downpipe sealing around joints and problem spots
External weatherproofing on areas prone to standing water or wind-driven rain
General property maintenance projects where a flexible waterproof membrane is beneficial

Problem → Solution

Ideal for stopping persistent leaks and damp ingress where rigid sealants can crack, by forming a flexible, waterproof membrane that helps keep water out.

Product Specifications

Manufacturer – Sherwin Williams
EAN / Barcode – 5010214567010
Dimensions / Size – 2.1L
Colour / Finish – Black
Product Type – Sealant coating / liquid rubber waterproofing

Why Buy from BHL

Sherwin Williams is known for dependable trade coatings, and ISOFLEX Liquid Rubber is a practical choice for flexible waterproof sealing and repair work. Buy online today from BHL for competitive pricing, free* & fast UK delivery, and careful dispatch from UK warehouses. BHL is a specialist online merchant trusted by thousands of satisfied customers since 1998, with thousands of 5 star reviews. Choose BHL for a smooth ordering experience and the right product delivered when you need it. *see our terms

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Buying guide: Sealants

Sealants fill joints and gaps to keep out water, draughts, noise and dust, and help hold fittings such as baths steady. This category covers bath and kitchen sealants, sealant and adhesive cartridges, indoor and outdoor gap fillers, heat-resistant sealants, tile grouts and sealant guns, plus some vehicle products such as tyre puncture sealants.

Which sealant

Silicone: the usual choice for wet areas and smooth surfaces such as tiles, glass, baths, basins and shower trays. Bathroom versions resist mould. Paint will not stick to silicone, so do not use it where the joint will be painted.
Acrylic: paintable and low odour, used indoors for joints around skirting boards, stairs, floorboards and window and door frames, but not for joints that stay wet.
Sealant and adhesive: hybrid cartridges that seal and also bond, useful where a fixing and a seal are needed together.
Heat-resistant sealant: for joints exposed to high temperatures. Check the temperature rating on the cartridge against the job.
Grout: fills the joints between tiles. Choose wall or floor grout to suit the job, and a quick-setting type if the area is needed back soon.

Getting a good seal

Cut out all the old sealant, clean off any residue and mould, and let the joint dry fully before you start. Apply a steady bead with the nozzle at roughly 45 degrees and smooth it with a tool. When sealing a bath, fill it with water first and leave it full while the sealant cures, so the bath is already at its loaded position. Leave the curing time stated on the cartridge, often a day or more, before the joint gets wet. Follow the manufacturer's instructions and safety data.

For bonding rather than sealing, see adhesives, or browse sealants and adhesives.

Shop all Sealants