Crommelin Bitflex 15L is a water‑based bitumen emulsion waterproofing membrane designed to protect below‑ground and non‑UV exposed surfaces. It combines synthetic rubber co‑polymer technology with easy application, so you achieve a flexible, watertight seal that withstands moisture over time. Because it dries quickly and adheres strongly, Bitflex is ideal for a range of non‑critical waterproofing projects where lasting performance is essential.

Key Features:

• Water‑borne bitumen emulsion enhanced with synthetic rubber for excellent waterproofing and flexibility.

• Strong adhesion to concrete, brick and masonry substrates.

• Quick‑drying formula that allows for faster recoating and job progression.

• Permanent flexibility accommodates structural movement and reduces cracking.

• Non‑flammable and low VOC, aiding environmental compliance.

• Remains watertight under permanently wet conditions once fully cured.

Ideal For:

• Retaining walls and planter boxes requiring moisture protection.

• Concrete footings, gutters and masonry substrates that need durable waterproofing.

• Timber posts or pots in non‑UV exposed settings.

Application & Benefits:
Start by preparing surfaces so they’re clean, dry and free of loose material. Then roll or brush Bitflex on in even coats; its fast drying time helps you recoat sooner and keep your project moving. Because the membrane is flexible, it adapts to slight movement in substrates, helping maintain a continuous waterproof barrier. This product isn’t suitable for areas exposed to direct sunlight or for surfaces that will be tiled or painted over without an appropriate system designed for those finishes.