MARISEAL® 300 TECHNICAL DATA SHEET
Date: 01.06.2011 – Version 10
Liquid-applied polyurethane waterproofing membrane
Solvent free
Product description Advantages
The MARISEAL® 300 is a liquid-applied, solvent-free, hardelastic,
cold applied and cold curing, two component
polyurethane membrane used for long-lasting
waterproofing and protection.
Cures by reaction (cross linking) of the two components
• Certified for safe use in potable (drinking) water reservoirs.
• When applied forms seamless membrane without joints or
leak possibilities.
• Resistant to water and frost.
• Maintains its mechanical properties over a temperature span
of -30oC to +90oC.
• Remains elastic even at low (frost) temperature.
• Full surface adherence.
• The waterproofed surface can be walked on.
• Low cost.
Uses Consumption
1,2 - 1,5 kg/m2 applied in three 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.
Colors
• Waterproofing of Drinking Water Supply Channels.
• Waterproofing of Drinking Water Pipes.
• Waterproofing of Drinking Water Tanks and Reservoirs.
• Odorless waterproofing of Wet Areas (under-tile) in
Bathrooms, Swimming Pools, Kitchens, etc.
Used for waterproofing of surfaces in direct contact with
potable (drinking) water.
Used for waterproofing of not well-ventilated, Wet Rooms
and Wet Areas (bathrooms, kitchens, etc) applied under
the tiles, when a odorless, solvent-free coating is required.
The MARISEAL® 300 is supplied in off-white.
Other RAL colors may be supplied on demand.
Certifications
The MARISEAL® 300 is certified according the current European and German legislation for use on surfaces in direct contact
with potable (drinking) water, and potable (drinking) water storage tanks.
The MARISEAL® 300 conforms with the German Standard (Kunststoffe im Lebensmittelverkehr, par. 1.3.2.5.2), the Greek
Standard (Codex Aliimentarius, articles. 21,21a,24,26,28) and the current relevant European Union directives. Tests
conducted following the ELOT EN 1484, prEN 12873-1, prEN 14395-1 standards.
The MARISEAL® 300 is certified according the Singapore Standard SS 375:2001 “Suitability of non metallic products for use
in contact with water intended for human consumption with regard to their effect on the quality of the water” and was found
conforming. The Singapore Standard SS 375:2001 is an adption of Britsh Standard BS 6920 :2000.
The MARISEAL® 300 is certified according the BS 6920-1 :2000 and was found conforming.
Technical Data *
PROPERTY RESULTS TEST METHOD
Composition Polyurethane Resin + Hardener
Mixing Ratio A+B = 6:1 by weight
Resistance to Water Pressure No Leak (1m water column, 24h) DIN EN 1928
Elongation at Break >100% ASTM D 412
Adhesion to concrete >2,0 N/mm 2 ASTM D 903
Hardness (Shore A Scale) 70 + 5 ASTM D 2240
Solids Content 100% CALCULATED
UV accelerated ageing, in the presence of moisture Passed - No significant changes EOTA TR-010
Hydrolysis (5% KOH, 7days cycle) No significant elastomeric change Inhouse Lab
Service Temperature -40oC to +90oC Inhouse Lab
Tack Free Time 6-8 hours
Light Pedestrian Traffic Time 24 hours
Final Curing time (ponding test) 7 days
Conditions: 20oC, 50% RH
Chemical Proper t ies Good resistance against acidic and alkali solutions (5%), detergents,
seawater and oils.
Application
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:
The careful sealing of existing cracks and joints before the application is extremely important for long lasting waterproofing
results.
• 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® 300, 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® 300, 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® 300, 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 and the joint is fully covered from the inside. Then
fully saturate the FABRIC with enough MARISEAL® 300. Then place a polyethylene cord of the correct dimensions inside
the joint and press it deep inside onto the saturated FABRIC. Fill the remaining free space of the joint with MARIFLEX®
PU 30 sealant. Do not cover. Allow 12 hours to cure.
Priming
Prime surfaces, like concrete, cement screed, metal, and ceramic tiles with enough MARISEAL® 750 primer (min. 250 – 300
gr/m2). Allow 12 hours to cure.
Mixing
Stir MARISEAL® 300 Component A well before using. Then add the MARISEAL® 300 Component B at the stipulated mixing
ratio. MARISEAL® 300 Component A and Component B should be mixed by low speed mechanical stirrer, for about 3-5 min.
ATTENTION: The mixing of the components has to be effected very thoroughly, especially on the walls and bottom of the
pail until the mixture becomes fully homogeneous.
Waterproofing membrane
Poor the entire MARISEAL® 300 A+B mixture, onto the primed and prepared surface and lay it out by roller or brush, until all
surface is covered.
Please ensure consumption within the pot life of the product (~30min)! Please do not leave the mixed MARISEAL® 300 A+B
coating in the pail for long, because the exothermic reaction accelerates the curing and will shorten the pot-life. Directly after
mixing poor the mixture on the surface on in smaller pails to minimise the exothermic reaction.
Reinforce with MARISEAL® FABRIC at problem areas, like wall-floor connections, pipe-outlets, waterspouts (siphon), etc. In
order to do that, apply on the still wet MARISEAL® 300 a correct cut piece of MARISEAL® FABRIC, press it to soak, and
saturate again with enough MARISEAL® 300. For detailed application instructions with the MARISEAL® FABRIC, contact our
R+D department.
After 12-18 hours - but not later than 48 hours –apply another layer of the MARISEAL® 300, by using roller or brush. For
demanding applications apply a third layer.
RECOMMENDATION: We recommend reinforcement of the entire surface, with the MARISEAL® FABRIC. Use 5-10cm stripe
overlapping.
RECOMMENDATION: For best results, the temperature during application and cure should be between 5oC and 30OC. Low
temperatures retard cure while high temperature speed up curing. High humidity may affect the final finish.
WARNING: The MARISEAL® 300 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.
Packaging
MARISEAL® 300 A+B is supplied in 6+1 kg 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.
Safety measures
MARISEAL® 300 contains isocyanates. See information supplied by the manufacturer. Please study the Safety Data sheet.
PROFESSIONAL USE ONLY
Our technical advice for use, whether verbal, written or in tests, is given in good faith and reflect the current level of knowledge and experience with our products. When using our products, a detailed object-related
and qualified inspection is required in each individual case in order to determine whether the product and /or application technology in question meets the specific requirements and purposes. We are liable only for
our products being free from faults; correct application of our products therefore falls entirely within your scope of liability and responsibility. We will, of course, provide products of consistent quality within the scope
of our General Conditions of Sale and Delivery. Users are responsible for complying with local legislation and for obtaining any required approvals or authorizations. Values in this technical data sheet are given as
examples and may not be regarded as specifications. For product specifications contact our R+D department. The new edition of the technical data sheet supersedes the previous technical information and renders
it invalid. It is therefore necessary that you always have to hand the current code of practice.
* All values represent typical values and are not part of the product specification.