Polyurethane foam, or PUR foam, is a modern, versatile, and effective material used in insulation solutions, protective coatings, and surface treatments.
Thanks to its excellent insulating properties and durability, PUR foam is suitable for many complex areas where other solutions may deteriorate or lose their effectiveness over time.
What is Polyurethane Foam?
Polyurethane foam is a two-component chemical material created by the reaction of polyol and isocyanate. It cures rapidly and forms a dense, closed-cell foam that adheres firmly to various substrates.
PUR foam is typically applied by spraying, which allows for a seamless and thermal-bridge-free insulation layer even in areas with complex geometries: foundation-wall junctions, around pipes, uneven base surfaces, ceiling corners, between rafters, arches, and sloped surfaces.
Key Properties of Polyurethane Foam
- Very low thermal conductivity (λ ≈ 0.020–0.025 W/mK)
- Excellent adhesion to concrete, metal, wood, and other surfaces
- Waterproof and vapor-resistant
- Resistant to mold and rot
- Mechanically strong and flexibly elastic
- Efficient for fast installation – cures quickly and is ready for use within hours.
Most Common Uses of Polyurethane Foam
Insulation: walls, roofs, foundations, and floors
PUR foam is ideal for insulating both new constructions and renovated buildings. Thanks to its seamless installation and strong adhesion, it ensures high energy efficiency, preventing cold bridges and air leaks.
Wet areas and problematic zones
PUR foam does not absorb water and blocks vapor movement, making it an excellent choice for insulating foundations, basements, and plinths, as well as surfaces in washrooms, under showers, and other humid environments.
Thanks to its water and mold resistance, PUR foam is widely used in water centers, spas, swimming pools, and sauna rooms, where moisture loads are consistently high. It creates a reliable, dense, long-lasting base layer that helps prevent water damage and ensures surface durability for years.
Sub-layer for floor coverings
A strong and stable PUR layer provides a solid base for various floor coverings. It also helps absorb sound, keep floors warm, and reduce heating costs.
Protective and surface coating with Polyurea
A polyurea topcoat can improve the mechanical and chemical resistance of PUR foam. This special material is highly resistant to wear and harsh conditions.
This solution protects industrial buildings, garages, tanks, floors, or plinths.
Technical Specifications of Polyurea
- Tensile strength: ≥ 15 MPa
- Elongation: ≥ 350%
- Hardness (Shore A): 85–95
- Drying time: < 10 seconds
- Full curing: Within 24 hours
- Chemical resistance: Resistant to fuels, salts, oils, and many solvents
- Temperature resistance: –40°C to +120°C
Due to its fast curing and durability, polyurea is well-suited for environments requiring rapid resumption of work and high durability.
Who is PUR Foam with Polyurea coating suitable for?
- Renovators looking to reinforce old buildings and prevent moisture problems
- New homeowners seeking reliable and long-lasting insulation
- Industrial companies with production floors exposed to constant mechanical and chemical stress
- Construction companies that need fast, reliable, and enduring solutions in challenging conditions, like uneven surfaces, complex shapes, short working windows, or high humidity
Choose a material that lasts
Polyurethane foam is a versatile material with excellent insulating properties. It is suitable for insulating walls, ceilings, roofs, foundations, and plinths. Its dense structure, water resistance, and seamless installation provide an effective solution for avoiding cold bridges and ensure an energy-efficient and moisture-resistant result, even in challenging conditions.
When combined with a polyurea coating, the overall system’s mechanical and chemical resistance is significantly enhanced. Polyurea forms a strong and flexible protective layer that withstands wear, impact, chemicals, and extreme temperatures. This makes the material combination especially suitable for industrial and production buildings, garages, spas, water centers, and other humid or technically demanding environments where uncompromising quality is essential.
Together, polyurethane foam and polyurea coating create a strong, durable, and long-lasting solution equally suited for both residential and heavy-duty technical applications.
If you’re seeking expert assessment and professional installation, contact the team at Polimaris. We’ll help you find the right solution for your building or project!