Long-Lasting Waterproofing for Mortar and Render

Cementone Integral Waterproofing Liquid – 25L by Bostik is a professional-grade additive designed to enhance the water resistance of mortar, render, and non-structural concrete. Ideal for both interior and exterior applications, it’s the go-to solution for protecting basements, external walls, swimming pools, and tank linings from moisture ingress.

Its advanced formulation contains an alkaline soap of mixed fatty acids that reacts chemically with cement to form hydrophobic salts—effectively blocking water penetration and helping prevent common issues such as efflorescence, lime bloom, and surface crazing.

This liquid additive is non-corrosive, making it safe for use with embedded metal reinforcements. Supplied in a large 25L container, it's perfect for larger-scale jobs, with smaller 5L sizes available for smaller applications.

Features & Benefits:

• Integral Waterproofing – Enhances water resistance in mortar, render, and non-structural concrete
• Chemical Reaction Formula – Forms hydrophobic salts to reduce moisture ingress
• Efflorescence Prevention – Helps prevent lime bloom, crazing, and surface staining
• Non-Corrosive – Safe for use with reinforced metalwork
• Versatile Applications – Ideal for external walls, basements, pools, and tank linings
• Moisture Control – Supports even drying and a more consistent finish
• Pack Size: 25 litres (also available in 5L)

Perfect For:

• Waterproofing render and mortar in wet or below-ground environments

• Protecting internal and external surfaces from water damage

• Large-scale or professional construction and renovation projects