Mariseal 250

Mariseal 250

Price: Liên hệ


Inverted Flat Roof Waterproofing
Inverted flat roof waterproofing and thermal insulation of a flat roof is essential for all buildings.The inverted flat roof waterproofing method with the MARISEAL SYSTEM® offers a simple build-up system that features a protected waterproofing membrane and loose laying insulation boards.The inverted waterproofing insulation system is applicable for all types of flat roofs.This cost effective and energy saving insulation and waterproofing system, is an efficient solution for new construction but also for renovation of old flat roofs as is it possible to install an inverted roof over an existing roof build up.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.The MARISEAL SYSTEM® consists of different products, dependant on the roofs characteristics.
Liquid-applied polyurethane waterproofing membrane

Product description
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. 

Technical Data 




Elongation at Break

> 800 %

ASTM D 412 / DIN 52455

Tensile Strength

> 4 N/ mm 2

ASTM D 412 / DIN 52455

Water Vapor Permeability


> 25 gr/m /day

ISO 9932:91

Resistance to mechanical damage by static impression

High Resistance (class:P3)


Resistance to mechanical damage by dynamic impression

High Resistance (class:P3)


Resistance to Water Pressure

No Leak (1m water column, 24h)

DIN EN 1928

Adhesion to concrete


>2,0 N/mm (concrete surface failure)

ASTM D 903

Crack Bridging Capability

up to 2 mm crack


Hardness (Shore A Scale)


ASTM D 2240 (15”)

Resistance to Root Penetration


UNE 53420

Solar Reflectance (SR)


ASTM E903-96

Solar Emittance (ε)


ASTM E408-71


Thermal Resistance (80 C for 100 days)

Passed - No significant changes


UV accelerated ageing, in the presence of moisture

Passed - No significant changes


Resistance after water aging



Hydrolysis (5% KOH, 7days cycle)

No significant elastomeric change

Inhouse Lab

Construction Material Fire class


DIN 4102-1

Resistance to Flying Sparks and Radiating Heat


DIN 4102-7

Service Temperature

o                          o

-30 C to +90 C

Inhouse Lab

Shock Temperature (20min)


200 C

Inhouse Lab

Rain Stability Time

4 hours


Conditions: 20 C, 50% RH

Light Pedestrian Traffic Time

12 hours

Final Curing time

7 days

Chemical Properties

Good resistance against acidic and alkali solutions (5%), detergents,

seawater and oils.



Surface Preparation
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.