NATCEM 35 Fast Setting Waterproof Repair Mortar 25kg

NATCEM® 35 –  High-Strength Natural Cement Repair Mortar 

NATCEM® 35 is a fast-setting, high-strength natural cement repair mortar designed for rapid repairs, waterproofing, and structural applications.

Formulated with natural cement binders and graded aggregates, it delivers rapid strength gain, excellent durability, and waterproof performance, even in demanding environments including underwater and marine conditions.

Key Features & Benefits

• Fast setting – initial set ~35 minutes, final set ~40 minutes
• Rapid strength gain – up to ~56 MPa compressive strength
• Waterproof mortar – suitable for wet and submerged conditions
• Can be applied underwater – ideal for marine and repair work
• Environmentally friendly – natural cement formulation
• High chemical resistance – suitable for aggressive environments
• Low shrinkage – reduces cracking risk
• Suitable for potable water use – approved for public water supplies

Applications

NATCEM® 35 is ideal for:

• Concrete repair and reinstatement
• Waterproof rendering and screeds
• Grouting and void filling
• Repairs in marine, coastal, and sewer environments
• Swimming pools and water-retaining structures
• Historic building restoration and conservation projects
• Repairs in rivers, canals, and underwater applications

Technical Overview

• Type: Natural cement repair mortar
• Set Time: ~35–40 minutes at 20°C
• Compressive Strength: ~56 MPa (28 days)
• Flexural Strength: ~7.5 MPa (approx.)
• Application Thickness: ≥10 mm
• Yield: ~12.5 litres per 25 kg bag
• Coverage: ~1 m² at 10 mm thickness
• Application Temperature: Down to 0°C
• Mix Ratio: ~3.6–4 litres water per bag

Why Choose NATCEM® 35?

NATCEM® 35 offers rapid repair capability with exceptional durability, making it ideal for projects where speed and performance are critical. Its ability to set underwater and perform in harsh environments sets it apart from standard repair mortars.

Frequently Asked Questions (FAQs)

❓ What is NATCEM 35 used for?

It is used for fast repairs, waterproofing, grouting, and structural applications, including underwater work.

❓ How quickly does it set?

It starts setting at around 35 minutes and finishes at 40 minutes at 20°C.

❓ Can it be used underwater?

Yes, it is specifically designed to set and perform underwater.

❓ Is it suitable for drinking water applications?

Yes, it is approved for use in public water supplies.

❓ What thickness can it be applied at?

It should be applied at a minimum thickness of 10 mm.

❓ Is it environmentally friendly?

Yes, it is made with natural cement and designed for environmentally sensitive areas.

Downloads

Data Sheet