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Waterproofing Services › Polyurethane Waterproofing
Polyurethane Waterproofing — Flexible Waterproofing System

Polyurethane Waterproofing
Flexible Waterproofing System
Highly Elastic. Permanently Durable.

Waterproofing service using a flexible polyurethane system that withstands structural movement — suitable for bathrooms, balconies, basements, and all types of building walls.

🏆 Smart & Bright — Thailand's #1 CFRP Specialist
✓ Up to 300% Elongation ✓ Strong Adhesion to Concrete ✓ Heat & Moisture Resistant
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Polyurethane Waterproofing
Polyurethane Waterproofing — Flexible Waterproofing System
About the Service

What is Polyurethane Waterproofing?
And How Does It Work?

Polyurethane Waterproofing is a system that coats surfaces with a polyurethane compound, forming a flexible film that withstands structural movement and effectively prevents water ingress — even through hairline cracks. It is ideal for wet areas and structures subject to settlement or thermal movement.

Polyurethane Waterproofing is best suited for: bathrooms, balconies, basements, and external building walls that require a flexible waterproofing membrane that endures structural movement throughout the building's service life.

Suitable for:

Bathrooms Balconies Basements Building Walls Rooftops
Polyurethane Waterproofing in Action
300%
Maximum Film Elongation
Key Features

Capabilities of Polyurethane Waterproofing

A highly flexible waterproofing membrane that bonds firmly, withstands structural movement, and is suitable for all types of wet areas and outdoor surfaces.

Elongation Up to 300%
The polyurethane film stretches up to 300%, self-bridging hairline cracks without splitting or delaminating even as the structure expands and contracts with temperature changes.
Strong Bond on Concrete
Bonds firmly to concrete, brick, and cement surfaces, preventing film delamination from the substrate even under high-humidity conditions.
Resists Structural Movement
Designed to accommodate natural structural movement, joints, and cracks caused by settlement or concrete expansion — maintaining a watertight seal throughout.
Suitable for Indoor & Outdoor Use
Resistant to UV radiation, high temperatures, and humidity — suitable for both outdoor areas such as rooftops and indoor areas such as bathrooms and basements.
Safe for Residential Areas
The polyurethane formula is safe for living spaces, bathrooms, and high-traffic areas — meeting safety standards for both residential and commercial buildings.
Long-Term Maintenance Savings
Long service life with infrequent repairs, significantly reducing long-term costs compared to conventional waterproofing systems.
Installation Process

The Polyurethane Waterproofing Process

A systematic process carried out by specialist engineers — from surface preparation and primer application, to polyurethane layer coating, water testing, and quality guarantee.

1
Surface Inspection & Preparation
Thoroughly clean the surface, carry out initial crack repairs, and ensure the substrate is dry and clean to allow the polyurethane compound to bond fully.
2
Apply Primer
Apply a primer suited to the substrate material to enhance adhesion between the concrete surface and the polyurethane layer, preventing air bubbles and delamination.
3
Apply Polyurethane Layers
Apply 2–3 coats of polyurethane compound, allowing each coat to cure fully before the next, forming a continuous and uniform waterproofing film at the specified thickness.
4
Water Testing & Quality Guarantee
Conduct a flood test to verify waterproofing integrity, inspect the film, and hand over with a quality certification report and workmanship warranty.
Polyurethane Waterproofing Application
Applications

What Types of Work Is It Suitable For?

Polyurethane Waterproofing is suited to wet areas and surfaces requiring a flexible waterproofing membrane — from residential buildings to commercial properties.

01
Bathrooms & Kitchens — Waterproofing floors and walls in bathrooms, kitchens, and wet areas inside buildings, preventing leaks into lower floors and structural elements throughout the building's service life.
02
Balconies & Outdoor Areas — Waterproofing balconies, outdoor terraces, and surfaces directly exposed to rain. The flexible film withstands expansion and contraction caused by temperature changes.
03
Basements & Underground Areas — Waterproofing basement walls and floors to prevent groundwater and moisture penetrating the structure. Suitable for underground car parks, storage rooms, and general below-grade areas.
04
Residential Rooftops — Waterproofing rooftop decks on houses and condominiums. UV and heat resistant, with a flexible film that effectively accommodates roof structural movement.
05
External Building Walls — Coating external walls directly exposed to rain and moisture, preventing rainwater penetration and reducing staining and wall deterioration.
Contact Us

Enquire About Polyurethane Waterproofing

Contact our engineering team for a free consultation and a quote tailored to your project.

Call 088-791-4494 Email Us
Hotline
088-791-4494
Office
02-736-9555
Email
sales@smartcoating.com
Fax
02-736-9648