Cementone Flexacryl Instant Waterproof Acrylic Roof Coating – 5kg (Grey)

Seal and protect your roof instantly with Cementone Flexacryl, a professional-grade, one-coat waterproofing solution formulated for quick, durable roof repairs. Whether it's old roofing felt, metal, concrete, bitumen, or rigid PVC, this flexible acrylic coating is designed to adhere even to damp surfaces, making it the ideal emergency or long-term repair product.

Engineered for year-round application, even in wet or cold weather, Flexacryl forms a seamless, long-lasting membrane that resists cracking, ponding, and extreme weather. Its primer-free formula reduces prep time, and its high elasticity accommodates roof movement without compromising protection.

Features & Benefits:

• Instant waterproofing for flat and low-pitch roofs

• Single-coat application – saves time and labour

• Adheres to wet or dry surfaces – no need to wait for dry conditions

• No primer required on most substrates

• Excellent flexibility – resists cracking or peeling

• Ideal for ponding areas – won’t degrade under standing water

• Exceptional weather resistance – performs in rain, frost, and sun

• Suitable for:

  • Roofing felt

  • Asphalt & bitumen

  • Concrete & cement

  • Metal & lead work

  • Brickwork & slate

  • Rigid PVC

• Colour: Grey

• Size: 5kg (Also available in 1kg & 2.5kg for smaller jobs)

Ideal Applications:

• Emergency waterproofing for flat roofs

• Maintenance on garages, sheds, extensions, and dormers

• Gutter and roof joint sealing

• Roof valleys and flashing areas

• General protection for weather-exposed roofing materials

Frequently Asked Questions (FAQs)

Q1: Can Cementone Flexacryl be applied in the rain?

A: Yes. Flexacryl is specially formulated for application in damp conditions, making it ideal for emergency roof repairs when the weather doesn’t cooperate.

Q2: Do I need to use a primer before applying Flexacryl?

A: In most cases, no primer is needed. Flexacryl adheres directly to common roofing materials like felt, concrete, and metal. However, highly porous surfaces may benefit from a diluted primer coat (Flexacryl mixed with water).

Q3: How long does it take to dry?

A: Drying time depends on the weather. Under normal conditions, Flexacryl is touch-dry within 6–12 hours and fully cured in 24–48 hours. Drying may take longer in cold or humid conditions.

Q4: Is Flexacryl suitable for flat roofs with standing water?

A: Yes. It is specifically designed for areas prone to ponding, offering long-lasting protection against standing water.

Q5: Can I apply a second coat?

A: While only one coat is needed, a second coat can be applied if required for extra protection, especially on rough or absorbent surfaces.

Q6: What’s the coverage rate for the 5kg tin?

A: The 5kg tin typically covers around 5–10m², depending on surface texture and porosity.

Q7: Can I paint over Flexacryl once cured?

A: It is not generally intended to be painted over, but some elastomeric or acrylic paints may adhere. Always conduct a patch test first.