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.
Liquid-applied polyurethane waterproofing membrane
The MARISEAL® 250 is a premium, liquid-applied, highly permanent elastic, cold applied and cold curing, one component polyurethane membrane used for long-lasting waterproofing. Solvent based.The MARISEAL® 250 is based on pure elastomeric hydrophobic polyurethane resins, which result in excellent mechanical, chemical, thermal, UV and natural element resistance properties.Mariseal 250 cures by reaction with ground and air moisture.
Simple application (roller or airless spray).
When applied forms seamless membrane without joints.
Resistant to water.
Resistant to frost.
Resistant to root penetration, so it can be used in green roofs.
Crack-bridging up to 2mm, even at -10 C.
Provides water vapor permeability, so the surface can breathe.
Provides excellent thermal resistance, it never turns soft.
Provides excellent weather and UV resistance.
Waterproofs old bitumen-, asphalt felts by covering them,without the need to remove them prior to application.
Provides high sun reflectivity, contributing to thermoinsulation.
Maintains its mechanical properties over a temperature span of 40oC to + 90oC
Provides excellent adhesion to almost any type of surface.
The waterproofed surface can be used for domestic and public pedestrian and vehicular traffic.
Resistant to detergents, oils, seawater and domestic chemicals.
Even if the membrane gets mechanically damaged, it can be easily repaired locally within minutes.
Does not need the use of open flames (torch) during application.
Over 15 years of positive feedback worldwide.
Waterproofing of Roofs
Waterproofing of Balconies, Terraces and Verandas
Waterproofing of Wet Areas (under-tile) in Bathrooms,
Kitchens, Balconies, Auxiliary Rooms, etc
Waterproofing of Pedestrian and Vehicular traffic Decks
Waterproofing of Green Roofs, Flowerbeds, Planter Boxes
Waterproofing of old Bitumen felts, Asphalt felts, EPDM and
PVC membranes and old Acrylic coatings.
Protection of Polyurethane Foam Insulation
Waterproofing and protection of Concrete constructions like
Bridge-Decks, Tunnels, Stadium Stands, Car Parks, etc
1,4 – 2,5 kg/m applied in two or three layers.
This coverage is based on application by roller onto a smooth
surface in optimum conditions. Factors like surface porosity,
temperature and application method can alter consumption.
The MARISEAL 250 is supplied in white and light grey. Other colors may be supplied on demand.
The MARISEAL 250 was tested by the German state testing institute for construction materials MPA-Braunschweig according the European Union Directive for liquid-applied roof institute for construction materials MPA-Braunschweig
waterproofing kits ETAG 005 and was found conforming.according the European Union Directive for liquid-appliedroof certification according to the EOTA (European Organization ofThe MARISEAL 250 was certified by the German state Institute for construction techniques DIBt–Berlin with the European Technical Approval (ETA) and with the CE-mark and Institute for construction techniques DIBt–Berlin with theCE-mark and certification according to the EOTA (European Organization of Technical Approval).The MARISEAL 250 was also tested and approved by variouslaboratories in different countries around the world.
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!
Repair of cracks and joints:
Clean concrete cracks and hairline cracks, of dust, residue or other contamination. Prime locally with the MARISEAL®
710 Primer and allow 2-3 hours to dry. Fill all prepared cracks with MARIFLEX® PU 30 sealant. Then apply a layer of MARISEAL®250, 200mm wide centered over all cracks and while wet, cover with a correct cut stripe of the MARISEAL®Fabric. Press it to soak. Then saturate the MARISEAL®Fabric with enough MARISEAL®250, until it is fully covered.Allow 12 hours to cure.
• Clean concrete expansion joints and control joints of dust, residue or other contamination. Widen and deepen joints (cut open) if necessary. The prepared movement joint should have a depth of 10-15 mm. The width:depth ratio of the movement joint should be at a rate of approx. 2:1. Apply some MARIFLEX®PU 30 Joint-Sealant on the bottom of the joint only. Then with a brush, apply a stripe layer of MARISEAL®250, 200mm wide centered over and inside the joint. Place the MARISEAL®Fabric over the wet coating and with a suitable tool, press it deep inside the joint, until it is soaked andthe joint isfullycovered from the inside. Then fully saturate the fabric with enough MARISEAL®250. Then place apolyethylene cord of the correct dimensions inside the joint and press it deep inside onto the saturated fabric. Fill theremaining free space of the joint with MARIFLEX® PU 30 sealant. Do not cover. Allow 12-18 hours to cure.