Description

Robust PU Liquid Rubber – Premium Waterproofing Coating

Product Description:

Robust PU Liquid Rubber is a high-performance polyurethane-based waterproofing membrane designed to provide seamless, durable, and flexible protection against water ingress. It forms an elastic, monolithic rubber-like coating that adheres strongly to concrete, metal, wood, and most construction materials. Once cured, it delivers superior resistance to UV rays, standing water, and temperature variations, ensuring long-term durability in harsh environments.

Key Features:

• 100% Waterproof: Creates a seamless and fully bonded waterproof membrane.

• High Elasticity: Expands and contracts with the surface without cracking.

• UV Resistant: Suitable for exposed applications such as roofs and terraces.

• Excellent Adhesion: Bonds strongly to concrete, metal, wood, and bituminous surfaces.

• Easy Application: Can be applied by brush, roller, or spray.

• Chemical & Weather Resistant: Provides long-lasting performance even in extreme conditions.

• Eco-Friendly: Solvent-free, non-toxic formulation safe for users and the environment.

Recommended Uses:

• Roof waterproofing and heat insulation coating

• Basement walls and foundations

• Water tanks (exterior coating)

• Balconies, terraces, and podium decks

• Wet areas (bathrooms, kitchens, washrooms)

• Retaining walls and planter boxes

• Bridge decks and expansion joints

Technical Details:

Application Instructions:

1. Surface Preparation:
   Ensure the surface is clean, dry, and free from dust, oil, or loose particles. Repair cracks and holes using a suitable sealant or repair mortar.

2. Primer Application (Optional):
   For porous surfaces, apply a polyurethane primer to improve adhesion.

3. Mixing:
   Stir the material thoroughly before application to ensure uniform consistency.

4. Application:
   Apply the first coat using a brush, roller, or airless spray. Allow 6–8 hours drying between coats. Apply the second coat in a perpendicular direction to ensure uniform coverage.

5. Curing:
   Allow full curing for 48 hours before exposing the surface to water or traffic.

Robust PU Liquid Rubber Waterproofing Coating – Complete Guide, Benefits, and Application Instructions

Introduction

Waterproofing is one of the most crucial aspects of any construction project. When water seeps into structural elements like concrete, bricks, or metal, it can cause corrosion, cracks, mold growth, and even structural failure. Among modern waterproofing solutions, Robust PU Liquid Rubber stands out as one of the most advanced, flexible, and long-lasting options.

This polyurethane-based liquid membrane is specially formulated to provide seamless, monolithic protection against water infiltration. Once applied, it forms a durable rubberized barrier that adheres to almost any surface, making it ideal for roofs, basements, terraces, and foundations.

What is Robust PU Liquid Rubber?

Robust PU Liquid Rubber is a single-component, polyurethane-based waterproofing coating that cures to form a highly elastic, joint-free membrane. It is designed to protect concrete, masonry, and metal surfaces from water damage while maintaining flexibility and strength under all climatic conditions.

This product combines the strength of polyurethane polymers with the elasticity of rubber, delivering both mechanical durability and chemical resistance. It is also UV-resistant, which makes it ideal for exposed applications like rooftops, terraces, and podium decks.

Unique Features and Advantages

1. Seamless Waterproofing Membrane

Unlike traditional waterproofing sheets or torch-on membranes that have joints or seams, Robust PU Liquid Rubber creates a 100% seamless barrier. This eliminates the weak points where leakage commonly starts.

2. High Elasticity and Crack Bridging

The coating can elongate over 500%, allowing it to bridge hairline cracks and structural movements without tearing or losing adhesion.

3. Long-Term Durability

Once cured, it forms a rubber-like membrane that resists aging, UV radiation, and weathering. It maintains flexibility and performance for years, even under extreme temperatures.

4. Excellent Adhesion

Robust PU Liquid Rubber bonds strongly to various materials, including:

• Concrete and cementitious substrates

• Metal and steel

• Wood

• Bitumen surfaces

• Old waterproof coatings

This wide adhesion range makes it suitable for new construction and renovation projects alike.

5. UV and Weather Resistance

The product is highly resistant to sunlight and UV exposure, making it suitable for exposed roofing systems where other coatings may degrade.

6. Chemical and Thermal Stability

It resists mild acids, alkalis, salts, and environmental pollutants. Even in regions with fluctuating temperatures, the coating remains stable without blistering or peeling.

7. Environmentally Friendly

Robust PU Liquid Rubber is solvent-free and non-toxic, making it safe for both applicators and the environment. It is VOC-compliant and can be used indoors and outdoors.

Technical Properties

Applications of Robust PU Liquid Rubber

The versatility of Robust PU Liquid Rubber allows it to be used across multiple areas in construction and maintenance projects.

1. Roof Waterproofing

It is ideal for flat or sloped roofs, RCC slabs, and metal sheet roofs. The coating forms a UV-resistant waterproof barrier that can handle direct sunlight and rain exposure.

2. Basement and Foundation Protection

Used to protect underground structures from groundwater ingress and dampness. It forms a durable waterproof film that resists hydrostatic pressure.

3. Water Tanks (Exterior)

Robust PU Liquid Rubber provides a long-lasting external protective coating that prevents water seepage and structural degradation.

4. Balconies, Podiums, and Terraces

Perfect for areas exposed to direct rainfall. It prevents leakage into interior rooms below.

5. Wet Areas

Bathrooms, kitchens, and laundries benefit from this coating as it seals joints and prevents water leakage through tiles and concrete surfaces.

6. Retaining Walls and Planters

Applied externally to protect the structure from soil moisture and root penetration.

7. Bridge Decks and Industrial Floors

Offers protection against water, salts, and chemicals, ensuring longer lifespan and reduced maintenance.

Detailed Application Instructions

Step 1: Surface Preparation

Surface preparation determines the success of the coating.

• The surface must be clean, dry, and free from dust, oil, grease, and loose materials.

• Use a wire brush, sandpaper, or mechanical grinder to remove laitance and weak particles.

• Fill cracks or holes using Robust Crack Filler or a polyurethane sealant.

• Ensure no standing water remains on the surface before coating.

Tip: Moisture trapped below the coating can cause bubbles or peeling later.

Step 2: Priming (Optional but Recommended)

On porous concrete or dusty substrates, priming ensures better adhesion.

• Use Robust PU Primer or a compatible polyurethane primer.

• Apply one thin coat with a brush or roller.

• Allow 2–4 hours drying before the PU Liquid Rubber application.

Step 3: Mixing

• Open the container and stir the contents thoroughly until uniform.

• Use a mechanical stirrer or drill mixer at 200–300 rpm.

• Do not dilute unless specified by the manufacturer.

Step 4: Application

1. First Coat:

   • Apply evenly with a roller, brush, or airless spray.

   • Maintain uniform thickness (0.8 – 1 mm per coat).

   • Allow 6–8 hours drying time.

2. Second Coat:

   • Apply perpendicular to the first coat to avoid pinholes.

   • Ensure full coverage of corners and edges.

3. Reinforcement:

   • For cracks or joints, embed fiberglass mesh or polyester fabric into the first coat.

   • Cover it with the second layer for additional strength.

Step 5: Curing

• Allow the coating to cure for 24–48 hours before water exposure.

• For heavy traffic or ponding areas, full curing requires 5–7 days.

• Avoid foot traffic until complete curing is achieved.

Step 6: Final Protection (Optional)

For exposed roof applications, apply a UV protective topcoat or reflective paint to extend the lifespan of the coating.

Coverage and Consumption

The coverage rate depends on the surface condition and texture.

Safety and Handling

• Use gloves, goggles, and safety masks during application.

• Ensure good ventilation in enclosed areas.

• Avoid inhalation of vapors or direct contact with skin.

• In case of skin contact, wash thoroughly with soap and water.

• Keep away from flames and sparks.

• Store in a cool, dry place away from sunlight.

Storage and Shelf Life

• Store in original, tightly sealed containers.

• Protect from freezing or direct sunlight.

• Shelf life: 12 months under standard storage conditions.

Why Choose Robust PU Liquid Rubber?

1. Superior Protection

Unlike conventional waterproofing materials, PU Liquid Rubber offers monolithic coverage, ensuring zero water penetration.

2. Flexible Performance

Its high elasticity allows it to expand and contract with the surface, making it ideal for climates with temperature variations.

3. Easy to Apply

Being single-component, it requires no mixing of hardeners or accelerators, reducing errors on site.

4. Low Maintenance

Once applied, it needs minimal maintenance, saving time and long-term repair costs.

5. Compatible with Various Surfaces

Its strong adhesion properties make it suitable for new and existing structures.

Common Mistakes to Avoid

• Applying on wet or dirty surfaces

• Not allowing enough curing time between coats

• Applying in direct rain or extreme heat

• Skipping primer on porous surfaces

• Using improper tools leading to uneven coating

By avoiding these mistakes, you ensure maximum performance and lifespan.

Professional Tips

• Apply each coat in opposite directions to ensure complete coverage.

• Always test adhesion on a small area before full-scale application.

• In hot climates, apply early in the morning or late in the evening to avoid rapid curing.

• Reinforce vulnerable areas (corners, joints, drain points) with additional material.

Environmental and Economic Benefits

• Reduces structural maintenance costs by preventing leakage damage.

• Environmentally safe, with low VOC content.

• Enhances the life of buildings by protecting against corrosion and carbonation.

• Provides energy savings when used with reflective topcoats that reduce roof heat gain.

Aftercare and Maintenance

Once the PU Liquid Rubber coating has cured:

• Inspect annually for any mechanical damage.

• Clean the surface periodically using mild detergents.

• Recoat damaged or aged areas after 5–7 years if required.

Proper maintenance can extend the coating life up to 15–20 years.

Conclusion

Robust PU Liquid Rubber Waterproofing Coating is a next-generation, reliable, and long-lasting solution for all waterproofing needs. Its seamless application, exceptional flexibility, and chemical resistance make it perfect for a variety of structures — from residential roofs to industrial basements.

With proper surface preparation and application, it delivers decades of protection against leaks, dampness, and environmental damage. Whether you are a contractor, architect, or homeowner, choosing Robust PU Liquid Rubber ensures peace of mind and structural integrity for years to come.

SEO Meta Description

Robust PU Liquid Rubber – Premium polyurethane waterproofing coating for roofs, basements, and terraces. Seamless, flexible, and UV-resistant waterproofing solution for long-lasting protection.

Precautions:

• Do not apply on wet or waterlogged surfaces.

• Avoid application during rainfall or extreme humidity.

• Use protective gloves and goggles during application.

• Store in a cool, dry place away from direct sunlight.

Packaging:

Available in  20 kg

Shelf Life:

12 months in sealed container under recommended storage conditions.

Robust PU Liquid Rubber is an advanced polyurethane-based waterproofing and sealing solution, offering unmatched durability and versatility for residential, commercial, and industrial applications. This high-performance liquid rubber is designed to form a seamless and flexible membrane, effectively preventing water ingress while withstanding thermal and mechanical stresses.

With excellent adhesion to a variety of surfaces, inclding concrete, metal, wood, and more, Robust PU Liquid Rubber ensures reliable and long-lasting protection. Its resistance to UV radiation, extreme temperatures, and chemical exposure makes it an ideal choice for roofs, balconies, foundations, and other critical structures. Easy to apply using a brush, roller, or spray, it provides a quick and efficient solution for ensuring waterproofing integrity in both new constructions and repair projects.

Robust PU Liquid Rubber is eco-friendly, solvent-free, and built to deliver maximum performance with minimal maintenance, making it a preferred choice for architects, contractors, and DIY enthusiasts alike.