Roof Coating: Imper PU Leakproof | ISAVAL

Isaval is a manufacturer of advanced and sustainable coating solutions for construction, offering a wide range of products from new-build to refurbishment projects.

Isaval introduces Imper PU, a liquid-applied polyurethane membrane designed to waterproof and thermally protect exposed surfaces. This flexible coating creates a continuous film that resists UV rays and adapts to structural movement, sealing cracks and preventing water penetration.

When applied in white, the membrane offers high solar reflectance, reducing indoor heat gain and contributing to energy savings and urban temperature reduction. Imper PU is suitable for a wide range of substrates and applications, from new construction to refurbishment.

Main features

• Liquid membrane that cures to form a continuous, elastic surface
• Polyurethane formulation allows crack-bridging performance
• UV and weather-resistant; suitable for exposed environments
• White version reflects solar radiation, improving thermal comfort
• Helps mitigate urban heat island effect
• Compatible with ceramic tiles, brick, concrete, and mortar
• Reinforced with fiberglass mesh for increased durability
• Ideal for both horizontal and vertical surfaces

System composition

• Substrate: masonry, ceramic tiles, concrete, etc.
• Repair layer (if needed): Rhona repair mortars
• Waterproofing layer: Imper PU, applied with fiberglass mesh reinforcement

Performance benefits

• Maintains integrity under thermal expansion and contraction
• Increases roof durability and weather resistance
• Enhances energy efficiency through reduced thermal gain
• Supports sustainable building standards (LEED, BREEAM)

Waterproofing System 1. Typical substrate: Masonry surfaces such as ceramic tiles, brick, concrete, and mortar 2. Surface repair: Rhona line of repair mortars 3. Protection and waterproofing layer: Imper PU, a polyurethane waterproof coating reinforced with fiberglass mesh