Sika®-1 Pre-bag Cementitious Waterproof Render

Sika®-1 Pre-bag Render Mortar – Structural Waterproofing Render System

Sika®-1 Pre-bag Render Mortar is a pre-bagged cementitious waterproof render designed for use within the Sika®-1 structural waterproofing system.

Blended with graded aggregates, cement, and waterproofing admixtures, it creates a fully bonded waterproof barrier for below-ground and water-retaining structures.

Key Features & Benefits

• Type A waterproofing system – compliant with BS8102:2022
• Fully bonded waterproof barrier – resists water ingress
• Hydrostatic pressure resistant – proven performance below ground
• Pre-bagged for consistency – reliable mix and quality control
• Can be applied to damp substrates – ideal for refurbishment
• Internal & external use – versatile waterproofing solution
• Suitable for multiple substrates – concrete, brick and blockwork
• High strength mortar – up to 80 N/mm² compressive strength

Applications

Sika®-1 Pre-bag Render Mortar is ideal for:

• Basement and cellar waterproofing
• Below-ground structures (BS8102 Grades 1–3)
• Swimming pools and water-retaining structures
• Tunnels, vaults and retaining walls
• Waterproofing of concrete, brick and blockwork substrates

Technical Overview

• Type: Cementitious waterproof render mortar
• System: Sika®-1 Structural Waterproofing System
• Compressive Strength: ~80 N/mm²
• Flexural Strength: ~11.4 N/mm²
• Density: ~2200 kg/m³
• Coverage: ~2 m² at 6 mm per 25 kg bag
• Mix Ratio: ~3.1 litres water per 25 kg bag
• Yield: ~12.3 litres per bag

Why Choose Sika®-1 Pre-bag Render Mortar?

This product provides a proven waterproofing solution for structures exposed to water pressure. Its multi-coat system compatibility and strong bond ensure long-term protection, making it a trusted choice for professional waterproofing contractors.

Frequently Asked Questions (FAQs)

❓ What is Sika-1 Pre-bag Render Mortar used for?

It is used for structural waterproofing of below-ground and water-retaining structures.

❓ Is it suitable for basements?

Yes, it is ideal for basements, cellars, and below-ground waterproofing systems.

❓ Can it be applied to damp surfaces?

Yes, it can be applied to wet or damp substrates, making it suitable for refurbishment projects.

❓ Does it resist hydrostatic pressure?

Yes, it provides proven resistance to hydrostatic back pressure.

❓ What substrates can it be used on?

It is suitable for concrete, brick and structural blockwork.

❓ Is it internal or external use?

It can be used for both internal and external waterproofing applications.

Downloads

Data Sheet