Saint-Gobain MARISEAL 250 Polymer Waterproofing Liquid

MARISEAL 250 is a one-component polyurethane liquid membrane, designed to provide a durable and flexible waterproofing solution. It cures by reacting with ground and atmospheric moisture, forming a seamless, elastic membrane with excellent adhesion to a variety of substrates. This product is ideal for flat roofs, balconies, terraces, and wet areas, offering superior resistance to weathering, UV radiation, and mechanical stress. It's known for its ease of application, allowing for a quick and efficient installation. MARISEAL 250 is a reliable choice for projects requiring robust, long-term waterproofing, ensuring protection against water ingress and contributing to the longevity of the structure.

Mariseal 250 is a highly durable, elastic, moisture-cured, cold-applied and cold-curing membrane. It's formulated using pure elastomeric hydrophobic polyurethane resins, providing exceptional resistance to mechanical stress, chemicals, thermal variations, UV radiation, and general weathering.

Consumption: 1.4-2.5 kg/m2 in two or three layers

Available colours: White, Grey, Red, Blue Grey

Available sizes: 1 kg, 6 kg, 15 kg, 25 kg

APPLICATION

• For the waterproofing of roofs, terraces and verandas, green roofs, old bitumen felts, asphalt felts, TPO, PP, EPDM, PVC membranes and old acrylic coatings
• For the protection of polyurethane foam insulation.

CHARACTERISTICS

• One-component, liquid-applied polyurethane membrane.
• Cold-applied and cold-curing.
• Moisture-cured (reacts with atmospheric and ground moisture).
• Forms a seamless, elastic, and durable membrane.
• Excellent adhesion to various substrates.
• High elasticity and flexibility.
• Superior resistance to weathering and UV radiation.
• Resistant to mechanical stress.
• Resistant to chemical exposure.
• Offers long-term waterproofing protection.
• Hydrophobic (water-repelling) properties.
• Ease of application.
• 25 years expected working life.

How to use

• The substrate must be clean, dry, and free from dust, grease, oils, loose particles, and any other contaminants that could interfere with adhesion.
• Repair any cracks, holes, or uneven surfaces before application.
• Depending on the substrate, priming may be necessary to ensure proper adhesion. Use the appropriate MARISEAL primer as recommended by the manufacturer.
• Porous surfaces, such as concrete, will almost certainly require a primer.
• Ensure the substrate is dry, as excessive moisture can affect the curing process.
• MARISEAL 250 is typically a one-component product, so mixing is usually not required. However, stir the material thoroughly before use.
• MARISEAL 250 can be applied by brush, roller, or airless spray.   
• For larger areas, airless spraying is often the most efficient method.
• Apply the product in layers, ensuring the recommended thickness is achieved. Multiple thin layers are better than one thick layer.
• Always follow the manufacturers instructions relating to the amount of product that should be applied per square meter.
• In areas prone to movement or stress, such as corners and joints, reinforcement with a polyester fleece or similar material is recommended. Embed the reinforcement fabric into the wet MARISEAL 250.
• When applying multiple layers, ensure proper overlapping to create a seamless membrane.
• Be aware of the product's working time, as it will begin to cure upon exposure to moisture.
• MARISEAL 250 cures by reacting with atmospheric and ground moisture. The curing time will vary depending on temperature and humidity.   
• Allow the product to cure completely before exposing it to water or traffic.
• Protect the freshly applied membrane from rain, dust, and other contaminants during the curing process.
• After curing, inspect the membrane for any defects or thin spots.

Important Considerations:

• Always consult the MARISEAL 250 technical data sheet and application guide for detailed instructions.
• Wear appropriate personal protective equipment (PPE), such as gloves and respirators, during application.
• Ensure adequate ventilation in the work area.
• Store the product according to the manufacturer's recommendations.

CERTIFICATIONS

• BBA Certificate no: 17/5443