Bridges

Product Specification

Manufacturer:

• Intelligent Membranes Ltd
• https://www.intelligentmembranes.com

Product Name:

• Passive Purple External

Type:

• Liquid-applied, anti-carbonation coating

Application:

• Used on external concrete surfaces to prevent ingress of carbon dioxide and moisture.
• Applied to bridge structures in aggressive environmental conditions (e.g. China project).

Performance Requirements:

• Carbonation resistance: Conforms to EN 1504-2
• Water vapour permeability: High; allows substrate to breathe
• UV and weather resistance: Excellent, suitable for exposed locations

Colours Available:

• Range includes Purple, Stone and custom options

Finish:

• Smooth, uniform coating suitable for visual concrete surfaces

Substrate Preparation:

• Ensure concrete surfaces are clean, dry and free from loose material, oil and laitance prior to application

Application Method:

• Brush, roller or airless spray

Curing Time:

• As per manufacturer’s guidance (typically touch-dry in 1–2 hours)

Coverage:

• Approx. 3–5 m² per litre depending on substrate porosity