Bitumen Polyurethane 2K – High-Performance Two-Component Waterproofing Membrane

Bitumen Polyurethane 2K is a high-performance two-component liquid waterproofing membrane designed for long-term protection of roofs, foundations, basements, tunnels, and all concrete structures exposed to moisture and water pressure. By combining polyurethane resin (Component A) with modified bitumen (Component B), this system forms a seamless, elastic, and chemically resistant waterproofing layer with excellent adhesion to concrete, screed, metal, and many construction surfaces.

This product is widely preferred in industrial and residential projects because it offers a strong balance between performance, flexibility, and cost-efficiency, making it a reliable alternative to traditional membranes and sheet systems.

What Is Bitumen Polyurethane 2K?

Bitumen Polyurethane 2K is a reactive two-component membrane. Once mixed, it cures into a flexible yet durable coating that protects surfaces from rainwater, groundwater, humidity, soil moisture, and chemical exposure.

While traditional bitumen coatings may crack or lose adhesion over time, the addition of polyurethane significantly improves elasticity, crack-bridging, and long-term durability, especially in extreme climates.

This makes it a popular choice for people searching for terms such as:
“2K waterproofing membrane,” “bitumen polyurethane coating,” “roof waterproofing liquid,” “foundation waterproofing solution,” and “flexible waterproof membrane.”

Where Can Bitumen Polyurethane 2K Be Used?

This membrane is suitable for most waterproofing applications, including:

Roof Waterproofing (Concrete Roofs, Terraces, Podiums)

Provides a long-lasting, UV-resistant membrane that does not crack on thermal movement.

Foundation & Basement Waterproofing

Protects underground concrete from soil moisture, hydrostatic pressure, and groundwater.

Wet Areas (Bathrooms, Kitchens, Balconies)

Creates a reliable membrane under tiles and screed.

Tunnels, Retaining Walls & Infrastructure Projects

High resistance to pressure and moisture makes it ideal for heavy-duty structures.

Green Roofs & Landscaping Areas

Root-resistant formulation prevents membrane damage caused by vegetation.

Industrial Floors & Service Areas

Resistant to washing, chemical splashes, and mechanical stress.

Key Advantages

Waterproof & Seamless Protection

The cured membrane forms a monolithic layer without joints or seams, eliminating common leakage points found in sheet membranes.

Highly Elastic (Crack-Bridging)

The membrane maintains flexibility even at low temperatures and bridges small cracks in concrete caused by shrinkage or movement.

Excellent Adhesion to Multiple Surfaces

Strong bonding to concrete, screed, metal, old bitumen layers, and tiles ensures secure performance over time.

Chemical & Weather Resistant

Resistant to chemicals, salts, and environmental exposure (UV, heat, humidity). Suitable for Middle Eastern climates.

Long-Term Durability

A reliable choice for those searching for “long-lasting waterproofing,” “heavy-duty waterproofing membrane,” and “professional waterproof coating.”

How to Apply Bitumen Polyurethane 2K

Surface Preparation

The surface should be dry, clean, and free of dust, oil, or loose materials. Repair cracks and prime if necessary.

Mixing

Combine Component A and Component B using a mechanical mixer for 2–3 minutes until completely uniform.

Application

Apply with roller, brush, or airless spray.
Recommended system: 2–3 coats, applying each layer after the previous one dries.

Drying Time

• Touch Dry: 2–3 hours

• Full Cure: 24–48 hours (depending on weather)

Why Choose Bitumen Polyurethane 2K Over Other Waterproofing Systems?

Compared with sheet membranes, cementitious coatings, or standard cold bitumen, this 2K system offers:

• Higher flexibility

• Better adhesion

• Longer service life

• Better crack-bridging

• Seamless application

• Superior resistance against water pressure

This is why it ranks among the top searches for high-quality waterproofing products in construction markets.

FAQ – People Also Ask

1. Is Bitumen Polyurethane 2K better than normal bitumen coating?

Yes. It offers higher flexibility, better adhesion, and longer durability. Polyurethane significantly upgrades the membrane’s strength and crack-bridging ability.

2. Can it be used on roofs exposed to sunlight?

Yes. It resists UV and temperature changes, making it suitable for exposed roofs.

3. How many layers are required?

Typically 2 to 3 coats depending on the project. Higher protection is achieved with three layers.

4. Can it be applied over old bitumen or existing waterproofing?

Yes. As long as the old surface is stable and clean, Bitumen Polyurethane 2K adheres very well.

5. How long does the waterproofing last?

When applied correctly, it can last 10–15 years depending on exposure and project conditions.