Roof Waterpoofing Coating
Roof waterproofing coating is very important. Roofs are not just visual features; they fulfill the crucial role of protection. Be it a classic flat roof or a dome roof, every roof structure has a unique character.Being the highest point in a building, they take a battering from the elements and leaking is common after a few years.MARIS POLYMERS offers liquid-applied Polyurethane waterproofing systems for roof coating with long-term protection for simple, detailed or complicated roof structures.The MARISEAL SYSTEM® is the technologically advanced,premium liquid polyurethane waterproofing system that offers easy application, full certifications, and most importantly guaranteed long lasting results.It can be used as a new flat roof coating, but also for repair or renewal. The MARISEAL SYSTEM® consists of different products, dependant on the roofs characteristics.
Aliphatic Polyurethane Top-Coat, UV-stable
Public pedestrian & Vehicular traffic areas
The MARISEAL® 420 is a pigmented, wear resistant, semi- rigid, color- and UV-stable, weather-stable, cold applied and cold curing, one component aliphatic polyurethane coating used as a top-coat for protection over exposed waterproofing coatings, subject to high wear conditions.Cures by reaction with ground and air moisture over a unique moisture triggered chemical reaction.
• Waterproofing of Decks and Walkways
• Waterproofing of public Pedestrian Traffic Areas
• Waterproofing of Exposed Car Parking areas
• Waterproofing of surfaces exposed to heavy wear conditions.
Used over the MARISEAL® 250 or 260, on surfaces with high public pedestrian trafficking (e.g. Stadium tribunes) and on surfaces with light car traffic (e.g. Exposed car parking areas)
400-500 gr/m2 in two layers.
This coverage is based on practical application by roller onto a smooth surface in optimum conditions. Factors like surface porosity, temperature, humidity, application method and finish required can alter consumption.
The MARISEAL® 420 is supplied in white, light grey and red. Other RAL colors may be supplied on demand.
• Simple application (roller or airless spray).
• One component.
• Resistant to constant, heavy abrasion and wear conditions.
• Color stable.
• UV stable
• Gives a glossy and easy-to-clean surface.
• Does not show the chalking effect of aromatic polyurethane waterproofing coatings.
• Resistant to water.
• Resistant to frost.
• Maintains its mechanical properties over a temperature span of -40oC to +90oC.
• The waterproofed surface can be walked on (public pedestrian traffic).
MARISEAL® 420 is supplied in 20 kg, 10 kg and 5 kg metal pails. Pails should be stored in dry and cool rooms for up to 9 months. Protect the material against moisture and direct sunlight. Storage temperature: 50-300C. Products should remain in their original, unopened containers, bearing the manufacturers name, product designation, batch number and application precaution labels.Download :
Careful surface preparation is essential for optimum finish and durability.The surface needs to be clean, dry and sound, free of any contamination, which may harmfully affect the adhesion of the membrane.Maximum moisture content should not exceed 5%. Substrate compressive strength should be at least 25MPa, cohesive bond strength at least 1.5MPa. New concrete structures need to dry for at least 28 days. Old, loose coatings, dirt, fats, oils, organic substances and dust need to be removed by a grinding machine. Possible surface irregularities need to be smoothened. Any loose surface pieces and grinding dust need to be thoroughly removed.
WARNING: Do not wash surface with water!
See relevant MARIS POLYMERS product Technical Data Sheet. Make sure that the last layer is broadcasted with silica sand.
Stir MARISEAL 420 well before using.
Apply the MARISEAL® 420 by roller or airless spray in one or two layers.
Allow 3-6 hours (not more than 36 hours) to cure, between the two layers.
ATTENTION: The MARISEAL® 420 must always be used over MARISEAL® 250 / 260, which was previously sprinkled with oven dry silica sand or corundum (corn size 0,1-0,3mm or 0,4-0,8mm) which creates an adhesion bridge. With the silica sand in the last layer of the MARISEAL® 250 / 260, the surface also becomes harder and more resistant to wear conditions.For best results, the temperature during application and cure should be between 5oC and 35oC. Low temperatures retard cure while high temperature speed up curing. High humidity may affect the final finish.
WARNING: The MARISEAL® 420 is slippery when wet. In order to avoid slipperiness during wet days, sprinkle suitable aggregates onto the still wet coating to create an anti-slip surface. Please contact our R+D Dept. for more details.
WARNING: If on the surface where the MARISEAL® system is applied, there are areas with ponding water, they should be cleaned on regular basis to avoid biological and microbial attack.