|Home||» Products||» Elastomeric Waterproofing Membranes|
We are pleased to offer EMB – ELASTOMERIC WATERPROOFING MEMBRANE manufactured by M/s ISOTHANE LTD,U.K.
EMB elastomeric membrane is a liquid applied coating based on polyurethane prepolymers extended with tar, which cures by reaction with atmospheric moisture to give a continuous film that is rubber-like and elastic.
EMB is a high solid coating designed to give a high-build film. It can be brush or spray applied ( with airless spray equipment ) but it has a higher viscosity than a conventional paint and should not be diluted.
EMB cures to a permanently flexible seamless membrane that, by virtue of its chemical reactivity in the wet state, has good adhesion to a wide range of substrates. Unlike more traditional bitumen based products, EMB does not readily embrittle with age, exposure to ultra violet radiation or weathering, and hence it does not crack or craze (European conditions).Since it is elastomeric EMB is not adversely affected by extremes of temperature consequently it is resistant to cracking at low temperatures and does not suffer thermal flow at elevated temperatures.
EMB can be applied by brush, airless spray or roller without the need to mix, stir or heat before application.
EMB is a membrane coating, not a paint and as such protection is only achieved with a high film build, i.e. 1 mm on flat surfaces minimum. It is therefore essential that this be achieved.
The membrane can be applied in one 1 mm or two 0.5mm coats.
Two coats are recommended on uneven and jointed surfaces to minimize the possibility of thin patches, missed areas and pin holing.
Also sloping or vertical surfaces will only accept 0.5mm per coat. In the case of two-coat application,
it is important to re-coat within 24 hours of the first coat becoming sufficiently cured to allow operator access.
Coverage rates may vary with surface texture and porosity. The information given is based on average usage. A site trial is recommended.The principle application for EMB is as a structural waterproofing layer in wet areas such as basements, balconies, wet areas, patios etc etc with a separate wear layer . It is worth reminding about some of the advantages of EMB in these applications over other types of membranes. For application as a waterproofing layer EMB can be overcoated with cement/tiles etc after 24 hours whereas many products takes 3-4 days to fully cure and EMB is a one-coat application at 1mm thickness, whereas many others require a two-coat application, so there will be time savings on site for EMB. EMB has a low volatile content at 170g/litre (ASTM D2369) compared to many other membranes which can give up to 25% more film build per application and EMB has passed the ASTM 836 Crack Bridging test which means that it has the toughness and flexibility to withstand building movements without being damaged, unlike many other products. Please be aware we cannot provide any performance guarantee for the product if it used in a sunlight exposed applications in the Indian climate.
PU Primer: 6 – 10m² / It. Not generally required for tanking, wet areas; but essential for example when over coating asphalt.
EMB: 1 litre / m² on a smooth flat surface will provide an adequate film thickness of approx. 1mm.
Any surface texture will increase the surface area which must be allowed for when calculating usage e.g. on a chipping embedded surface the actual area will be approximately doubled.PU primer single component is generally used on concrete and other types of masonry (ideally materials with a well keyed surface). It is not suitable for metals. We offer a different primer for painting metals (2 component acid etch primer) Isothane ZP Coverage rates are heavily dependant on substrate porosity so 6-10 metres squared per litre is the best estimate we can give.Drying time is variable with temperature and humidity. I would expect the drying time of Isothane PU primer to be very short in an Indian climate. From tests I have carried out, in the order of 30 minutes to 2 hours, depending on film thickness.The principle application for EMB is as a structural waterproofing layer in wet areas such as basements, balconies, wet areas, patios etc etc with a separate wear layer.It is worth reminding about some of the advantages of EMB in these applications over other types of membranes. For application as a waterproofing layer EMB can be overcoated with cement/tiles etc after 24 hours whereas many products takes 3-4 days to fully cure and EMB is a one-coat application at 1mm thickness, whereas many others require a two-coat application, so there will be time savings on site for EMB.
EMB has a low volatile content at 170g/litre (ASTM D2369) compared to many other membranes which can give up to 25% more film build per application and EMB has passed the ASTM 836 Crack Bridging test which means that it has the toughness and flexibility to withstand building movements without being damaged, unlike many other products.
Remove all loose material by vigorous brushing, wire brush if necessary.
Treat any fungal growth with proprietary fungicide as recommended.
Allow surface to dry thoroughly and any moisture contained in the structure to evaporate. Primer and EMB should not be applied to damp substrates.
Fill cracks and voids with a polyurethane mastic sealant.
(Not generally required for tanking, wet areas) Isothane PU Primer cures to a slightly tacky film within 2 - 4 hours. Overcoat with EMB as soon as possible after this time and certainly within 48 hours. If delay exceeds this, re-priming is advised.
Apply EMB at a maximum film thickness of 0.5 mm for two-coat applications and 1 mm for one coat.
In the case of two-coat application, the first coat should be touch dry 12-48 hours ( in some conditions this might be delayed ) and the second coat should be applied within 24 hours of this stage to ensure good adhesion.
Second coat delay: - if more than 24 hours elapse after touch dry stage of the first coat, re-prime the entire surface and allow to dry before recoating within 4-8 hours.
Day-work joints – where application extends over more than a working day, an overlap of 150mm should be used.
Aromatic hydrocarbon solvent should be used to clean equipment etc.
Spray Application (Refer to Isothane procedure guide)
Only airless spray should be used
Graco King 60 : 1 ratio or similar
Compressor: - 100psi, 60cfm min
Tip Size: - 28-30 thou 50º Angle
EMB is easily and quickly applied manually at a rate of 40m² per man per day or up to 600m² per man per day by spray application.
Minor damage to EMB can be repaired by removing loose membrane; cleaning the surrounding area with aromatic hydrocarbon solvent; overlapping by 150mm; priming the area with a suitable product, and finishing with two coats of EMB.
ARMOUR-CHEM Polyurea Elastomer
THE SPRAY APPLIED, ELASTOMERIC COATING THAT CAN BE PUT INTO SERVICE IN MINUTES.
The technology of Polyurea sprayed elastomers is based on amine - terminated polyether resins, amine chain extenders and isocyanates. It provides a flexible monolithic extremely tough elastomer with good physical properties, high degrees of thermal and hydrolytic stabilities and excellent water and chemical resistance.
ARMOUR - CHEM spray is a seamless membrane that can be handled and walked on one minute or less from the time it is sprayed
ARMOUR - CHEM spray is hydrophobic and therefore unaffected by damp substrates when creating non - bonded liners. It can be sprayed at temperatures as low as -30° C with minimal effect on tack free time
Due to the almost instantaneous gel of ARMOUR - CHEM spray, it can be built up to any thickness in one application including vertical and overhead applications. This eliminates the need for multicoat applications
ARMOUR - CHEM spray is 100% solids, no solvents, no V.O.C.s
The cured elastomer has a high thermal stability with constant working temperatures up to 130° C and intermittent temperatures up to 160° C
ARMOUR - CHEM spray can be applied with a standard 1 : 1 ratio plural component high pressure machine ( capable of developing 2000 psi ). Consult Isothane technical staff for a specific recommendation. The Polyurea exhibits a high service temperature due to its amorphous structure. The coating will stand an in service temperature range of -50° to +130° C
Some Recommended Uses
Fish boat holds
Earth containment lining
Tank linings for primary and secondary containment
Roof coatings for metal decks
Steel tanks, silos and pipes
Hail, bird and traffic protection over polyurethane foam
Encapsulant for styrofoam and other types of floatation
Liner for concrete tanks, ponds, lagoons, reservoirs, dykes, irrigation ditches, tunnels, barges, etc.
ARMOUR - COAT
UV Stable Aliphatic Polyurea Elastomer
ARMOUR - COAT R is a pure polyurea 100% solids, zero VOC resin system, which when combined with Armour - Coat H will produce a resilient, chemical resistant elastomer. It is fast curing ( 20 - 25 sec tack free time ) and can be used at temperatures down to -20ºC. It is formulated to be UV stable / colour fast.
ARMOUR - COAT is available in a range of colours as indicated, others by arrangement:
Protective coating where it is required to be UV color stable
General purpose waterproofing
Pedestrian and vehicles flooring
New internal and external industrial flooring
Restoring old internal and external industrial flooring
Restoring old asphalt layer without removal
ANTISTATIC AGENT FOR SILICONE EMULSIONS
This product is water based and mixable with silicone. The antistatic properties in combination with silicone are very good.
The usage of antistatic agent in silicone emulsions has several advantages:
- the antiblocking properties of the silicone will be improved, because the static charge is part of the blocking problem and this will be eliminated
- the working speed (winding, etc.) can be increased
- the finished product has antistatic properties and will not attrackt dust
- the handling of thermoformed products will be a sight better
It has further advantages, depending on the application of the silicone.
We have some products which may come into question for the named applications (spin finish, softener, fibres, white oils, etc.), but this should be tested in the particular case.