MARISEAL 250 | Liquid-applied polyurethane waterproofing membrane

The MARISEAL 250 is a highly versatile and durable polyurethane-based liquid membrane designed for long-lasting waterproofing across various surfaces. Here’s a breakdown of its features and usage guidelines:

Product Description & Advantages

Composition: Pure elastomeric hydrophobic polyurethane resins ensure excellent resistance to mechanical, chemical, thermal, UV, and natural elements.
Application: Cold applied and cures by reacting with ground and air moisture. Applied using a roller or airless spray.
Properties:
- Seamlessly forms a jointless membrane.
- Resistant to water, frost, root penetration (suitable for green roofs), and crack-bridging up to 2mm even at -10°C.
- Provides water vapor permeability, excellent thermal resistance, weather resistance, and UV reflectivity.
- Suitable for various surfaces and allows pedestrian and vehicular traffic.
- Resistant to detergents, oils, seawater, and domestic chemicals.
- Easily repairable if damaged, doesn’t require open flames during application.
- Over 15 years of positive feedback globally.

Uses & Consumption

Applications: Roofs, balconies, wet areas, pedestrian and vehicular decks, green roofs, old bitumen/asphalt felts, and concrete constructions.
Consumption: 1.4-2.5 kg/m² in two or three layers. Consumption can vary based on surface porosity, temperature, and application method.

Colors & Certifications

Colors: Available in white and light grey. Other colors available on demand.
Certifications: Complies with EU directives for liquid-applied roof waterproofing kits. Certified by German state testing institutes and holds the CE-mark.

Technical Data

Physical Properties: Demonstrates high elongation at break, tensile strength, water vapor permeability, resistance to mechanical and water pressure, adhesion, crack-bridging, and resistance to root penetration.
Weather & Thermal Resistance: Operates effectively between -30°C to +90°C.
Application Data: Specifies surface preparation, repair of cracks/joints, priming, and application instructions.
Packaging & Safety: Available in various quantities. Contains isocyanates; detailed safety measures provided in the Safety Data Sheet.

Application Instructions

Surface Preparation: Emphasizes clean, dry, and sound surfaces free of contamination, along with proper sealing of cracks and joints.
Priming: Recommends specific primers for different surfaces and detailed curing instructions.
Membrane Application: Application details for the membrane, reinforcement with fabric in problem areas, and curing times.
Finishing: Recommendations for top-coats for color stability, abrasion resistance, and anti-slip properties.
Packaging & Storage: Details on packaging, storage conditions, and shelf life.

Safety Measures

Safety: Stresses professional use only, highlighting the presence of isocyanates and the necessity of studying the Safety Data Sheet.

This comprehensive guide covers the product’s composition, advantages, applications, consumption rates, certifications, technical specifications, detailed application procedures, safety measures, and professional-use requirements.