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WATERPROOFING

COATING

Waterproofing coatings must be selected depending upon which side the waterproofing has to be done. Both in new or remedial waterproofing, there could be both Negative and Positive sides of the application. As discussed earlier, Positive side waterproofing implies that the waterproofing must be done from the side from where water ingress is possible. Side which is directly exposed to water and hydrostatic pressure. Negative side waterproofing implies to the opposite side of hydrostatic pressure. 

It is always advisable to take up waterproofing treatment from outside- Positive side of the structure if it’s possible. Majority of the products available with the manufacturers worldwide are for this type of waterproofing. Negative side products are limited to cementitious systems. The use of Concrete Admixtures is always suggested to make the structure watertight. 

The most disadvantage of negative side waterproofing is that the water will enter the concrete structure and promote corrosion and deterioration of reinforcing steel if chlorides are present. Positive side waterproofing prevents ingress of water into the concrete substrate and does not allow corrosion.

The three popular Waterproofing Systems for basement waterproofing are.

  • Liquid Applied Membranes
  • Cementitious Systems
  • Pre-Formed Membranes

LIQUID APPLIED MEMBRANES:

Liquid Applied systems can be both Solvent and Water based materials. These may have base of Polyurethane, Rubbers, Bitumen, Acrylics and /or a combination of these. These are in liquid form and after curing form a seamless sheet. 

Liquid Applied systems are positive side waterproofing application and require a protective layer before backfilling. These are used primarily because of ease of application, seamless curing, and adaptability to detailing. These systems are popular for basement, podiums, planters, and garden application. The systems used for basement waterproofing are not UV Stabilized and cannot withstand foot traffic. These systems typically have an elongation of over 400% with recognized testing as per ASTM C 836. This enables these systems to bridge cracks <2mm. The Liquid Systems have self- flashing capabilities which enables these to be applied seamless at substrate protrusions, changes in planes and floor wall junctions. 

Advantages of Liquid Applied Coatings:

  1. Seamless / Monolithic Membrane
  2. Shorten Installation Phase
  3. Superior Waterproofing
  4. Adaptable to detailing
  5. Excellent Elastomeric properties
  6. Ease of application

Disadvantages of Liquid Applied Coatings:

  1. Application thickness controlled at site
  2. Some products can not apply on wet surfaces

ConRepair MB602RGB

ConRepair MB602RGB is a cold applied liquid waterproofing membrane, specially designed from a blend of special resin and rubber, reinforced with special water repelling fillers, minerals stabilizers and gelling agent.

LA AcryDec 

LA AcryDec is a single component, Elastomeric, high performance, water-based UV Resistant Waterproof Coating. It is based on aliphatic acrylic polymer. It is an advanced acrylic technology product manufactured by combination of pigment, reinforcing fillers making the polymer flexible that allows the membrane to accommodate movement in the substrate. It is a seamless membrane that performs and adopt to any construction requirement in varied climatic conditions. La AcryDec is specially formulated to seal, waterproof and decorate exterior surfaces and roofs. It seals cracks and joints in old roofs/walls and simultaneously leaving a seamless finish to the roof surface.

LA BrushFlex 1K

LA BrushFlex 1K is a single component elastomeric liquid applied waterproofing membrane of hybrid acrylic co-polymer. It is an advanced acrylic technology product manufactured by combination of pigment, reinforcing fillers making the polymer flexible that allows the membrane to accommodate movement in the substrate. It is a seamless membrane that performs and adopt to any construction requirement in varied climatic conditions.

Cementitious Systems:

Cementitious materials are excellent products to be applied on below grade structures, both positive and negative sides. These systems are based on a mix of Portland Cement with or without sand and an active waterproofing agent. There are two types of cementitious systems: Crystalline System, Acrylic Modified Systems. These are applied using brush or trowel to the concrete or masonry surfaces and become integral part of the structure.

In the under-construction buildings, the biggest benefit of using a Cementitious system is that it does not need a dry surface. In fact, some moisture in the structure helps the system and improve its efficacy. It can also be applied if the concrete is not fully cured. These systems can be applied to both the walls and floor

All cementitious systems have similar application method. The performance may differ from product to product depending upon its formulation. The Cementitious systems lack crack bridging or elastomeric properties but have great adhesion to the substrate.

Advantages of Cementitious Systems:

  • Positive or Negative Side application
  • Remedial/ Repair Application

Disadvantage of Cementitious Systems:

  • No Movement Capability
  • Site Mixing Required
  • Can Not be used in high traffic areas

Acrylic Modified Coatings:

Acrylic modified cementitious or Polymer Modified Coatings are on the site blended coatings. These are mix of a factory blended mix of Portland Cement & Sand (may or may not be blended with special fibers) and Acrylic Emulsions. These acrylic emulsions add waterproofing characteristics to the system. These systems can be applied with brush or trowel. These can also be applied with a reinforcement mesh. The mesh adds some crack bridging capabilities. Many manufacturers are offering premix special fibers in the powder component. Different manufacturers offer product with Powder: Polymer ratio from 1: 0.2 to 1: 0.5. Higher the Polymer ration, better would be elongation and crack bridging ability. 

Acrylic Modified coating are applied in a thickness of 1.0mm to 2.0 mm. However, in certain application, using a trowel these can be applied up to 4-5mm thickness too. It is highly recommended to apply protection layer. Curing is recommended for 24 hours.

CrystoSeal 1K

CrystoSeal 1K is a single cementitious component powder, which when mixed with water forms a chemically active slurry that functions on the principle of crystallization. It is composed of a cementitious binder, well graded fillers and a combination of active chemicals and additives. Due to its formulation, the active substances in SS – CrystoSeal 1K penetrates the substrates by osmotic action, hydrates to form insoluble crystals and thereby blocks the penetration of water into the substrate, through capillaries and cracks. SS – CrystoSeal 1K is not very flexible, and hence is most suitable for waterproofing of indoor areas, masonry structures and as a dry-shake broadcasted material for RCC floor slabs. SS – CrystoSeal 1K forms a breathable (allows water vapor diffusion) cover that forms an integral part of substrates and shows extreme resistance to water ingress, both on the positive as well as negative side. It reacts with any free lime present in the substrate to form denser hydrates, which prevent any movement of water. This feature drives its use as a material that can be broadcast on a fresh cast floor slab. The slab so treated, when finished and cured, shows extreme resistance to water ingress. Being mineral in nature, its breathability and thermal characteristics are like the underlying substrate, assuring a long-lasting protection against water. SS – CrystoSeal 1K can be used in bathroom, wet areas, water tanks, masonry basements, Basement slabs, lift pits and many such applications.

Crystoseal 2K

Crystoseal 2K CrystoSeal 2K is a two-component cementitious system, comprising of a powder and a liquid component, which when mixed with water forms a chemically active slurry that functions on the principle of crystallization. The powder is composed of a cementitious binder, well graded fillers, and a combination of active additives. The liquid is a polymer modifier. Due to its formulation, the active substances in CrystoSeal 2K penetrates the substrates by osmotic action, hydrates to form insoluble crystals and thereby blocks the penetration of water into the substrate, through capillaries and cracks. CrystoSeal 2K is most suitable for waterproofing of indoor areas and masonry structures. CrystoSeal 2K forms a breathable (allows water vapor diffusion) cover that forms an integral part of substrates and shows extreme resistance to water ingress, both on the positive as well as negative side. It reacts with any free lime present in the substrate to form denser hydrates, which prevent any movement of water. Being mineral in nature, its breathability and thermal characteristics are like the underlying substrate, assuring a long-lasting protection against water. CrystoSeal 2K can be used in bathroom, wet areas, water tanks, masonry basements, Basement slabs, lift pits and many such applications. Being a polymer fortified system, the system shows better performance in accommodating thermal movements in structures.

CrystoSeal Flex

CrystoSeal Flex is a two-component cementitious system, comprising of a powder and a liquid component, which when mixed forms a chemically active slurry that forms crystalline hydrates and a flexible, water-resistant membrane due to the polymer component. The powder is composed of a cementitious binder, well graded fillers, and a combination of active additives. The liquid is a polymer modifier. CrystoSeal Flex can be used to waterproof most structures like buildings, bridge piers, culverts, tunnels, and structures where water pressures are high. It can be used for waterproofing terraces, roofs, parking structures, basements, swimming pools, sanitary areas etc. CrystoSeal Flex forms an elastic membrane with good abrasion, water, and chemical resistance. It is most suitable for protection from chloride attacks. This coating has crack bridging capability. Added coats increase the crack bridging characteristics. CrystoSeal Flex forms a breathable (allows water vapor diffusion) cover that forms an integral part of substrates and shows resistance to water ingress, both on the positive as well as negative side. Being mineral in nature, its breathability and thermal characteristics are like the underlying substrate, assuring a long-lasting protection against water. Being a polymer fortified system, the system shows superior performance in accommodating thermal movements in structures.

ConProof CR

ConProof CR is a single component cementitious powder, which when added to mortar or concrete, activates, and forms a chemically active waterproofing agent that functions on the principle of crystallization and hydrophobic pore blocking. It is composed of a cementitious binder, well-graded fillers and a combination of active chemicals and additives. Due to its formulation, the active substances in ConProof CR disperses rapidly into the mix and forms waterproof crystalline compounds, in addition to hydrophobic and swellable compounds that seal and block the penetration of water, through capillaries and cracks. The material increases water ingress resistance of the entire mortar / plaster / concrete mass as opposed to coatings, that only seal the top surface against water. ConProof CR forms breathable (allows water vapor diffusion) crystalline and hydrophobic compounds that form an integral part of substrates and shows extreme resistance to water ingress, both on the positive as well as negative side. ConProof CR disperses rapidly, reduces capillarity, and improves the compaction factor of concrete. The active compounds then form waterproof crystalline, hydrophobic as well as swellable water resistant pore blocking compounds, which stop the transport of water through the mass of the mix. The product conforms to IS:2645. ConProof CR can be used universally wherever water resistance is demanded of concrete / mortars or plasters.

Water Stop FC

Water Stop FC is a one component, cementitious, shrinkage compensated, free flow, waterproof injection grout, which can be used for a variety of operations, where strong, reliable, impermeable fill material is needed to treat voids and cracks in concrete, masonry, or soil. Water Stop FC ensures loads and forces of various kind are transferred across cracks and voids and that the element can be used to carry the intended loads in a brief period. The material is extremely free flowing and is fine enough to permeate small cracks and voids. The material is best suited to be used as a repair as well as waterproofing aid to seal cracks and voids reliably. The material is best suited to inject cracks 0.3 mm wide and above. Water Stop FC is specially formulated to meet the requirements described above, owing to the selection of particularly suitable cements, special strength enhancing additives and selected polymer binders. Water Stop FC benefits the user by being easy to inject, provides rapid return to service, is non-corrosive, is suitable for both compressive & flexural loads, Proper Injection ensures seamless load transmission to foundation the crack or void and ensures a precise, watertight, load bearing connection that most importantly does not shrink or crack.

LA FibreFlex Ultra

LA FibreFlex Ultra is a two-component elastomeric coating waterproofing system based on cementitious binders reinforced with compatible microfibers, special additives, fine-grained selected aggregates, high grade acrylic polymers to provide superior water protection which consists of La FibreFlex Ultra powder and La Bond Ultra. La FibreFlex Ultra can simply be applied by stiff brush, roller, or trowel to obtain the desired thickness. Also, it can be spray applied both on horizontal and vertical surface. The hardened layer of La FibreFlex Ultra stays constantly flexible under all environmental conditions. It has excellent bonding properties on all cementitious substrates as long as they are sound and sufficiently clean. Its high resistance to deteriorating effect of UV Rays, a principal characteristic of the product ensures the structures are protected and waterproofed even in extreme climatic conditions including saline-rich atmosphere and polluted Industrial areas. Ultra-Flexible two-component Cementitious Waterproofing System FibreFlex Ultra Tested to ASTM D4541, ASTM D88

La FibreFlex Smart

La FibreFlex Smart is a two component Hi-Flexible waterproofing system based on cementitious binders reinforced with compatible microfibers, special additives, fine-grained selected aggregates, high grade acrylic polymers to provide superior water protection which consists of La FibreFlex Smart powder and La Bond Smart. La FibreFlex Smart can simply be applied by stiff brush, roller, or trowel to obtain the desired thickness. Also, it can be spray applied both on horizontal and vertical surface. The hardened layer of La FibreFlex Smart stays constantly flexible under all environmental conditions. It has excellent bonding properties on all cementitious substrates as long as they are sound and sufficiently clean. Its high resistance to deteriorating effect of UV Rays, a principal characteristic of the product ensures the structures are protected and waterproofed even in extreme climatic conditions including saline-rich atmosphere and polluted Industrial areas.

La FibreFlex Xtra

La FibreFlex Xtra is a two component Hi-Flexible waterproofing system based on cementitious binders reinforced with compatible microfibers, special additives, fine-grained selected aggregates, high grade acrylic polymers to provide superior water protection which consists of La FibreFlex Xtra powder and La Bond Xtra. La FibreFlex Xtra can simply be applied by stiff brush, roller, or trowel to obtain the desired thickness. Also, it can be spray applied both on horizontal and vertical surface. The hardened layer of La FibreFlex Xtra stays constantly flexible under all environmental conditions. It has excellent bonding properties on all cementitious substrates as long as they are sound and sufficiently clean. Its high resistance to deteriorating effect of UV Rays, a principal characteristic of the product ensures the structures are protected and waterproofed even in extreme climatic conditions including saline-rich atmosphere and polluted Industrial areas.

ConRepairSC401

ConRepairSC401 is a water-based Primer composed of acrylic emulsion polymer, selected special additives in water as a medium. Recommended to be used as a primer coat for all brush able elastomeric waterproof membrane on porous parent concrete.

La BrushSeal

La BrushSeal is a water-based Primer composed of acrylic emulsion polymer, selected special additives in water as a medium. Recommended to be used as a primer coat for all brush able elastomeric waterproof membrane on porous parent concrete.

JOINTS SEALING TAPES:

Several types of Joint Tapes are needed in construction industry. These are used to seal the joints between two substrates, Vertical and Horizontal Joints, Expansion Joints, Construction joints and cracks, Future movements of the construction without causing damages, Basements, Tunnel construction, Around metal surfaces, Swimming pools, Cable and pipe penetrations, Sewage treatment plants

SWELLABLE WATER BAR

SWELLABLE WATER BAR are new generation high performance acrylic polymer based expanding bars and tape. It expands up to 900% when in contact with water. In a totally dry state, these shrink to its original installation dimension and re-expand on wetting. Swellable Water Bars or Tapes are used in concrete construction for the sealing of construction joints including wall to base connections, pipe entry systems, sealing of openings and interface sections between existing and new concrete.

EXTERNAL MEMBRANES:

External Membranes are Sheet or Pre-Formed membrane systems are reliable and durable waterproofing solution that can fulfill the requirements of even the most severe and demanding below ground structures. These are popular choice as these can withstand elevated level of ground water pressure, aggressive chemicals present in soil or water, dynamic forces due to earthquakes and ground settlements.

The sheet membranes come in fixed and controlled thicknesses, widths, and lengths. These range in thicknesses ranging between 1mm to 5mm and widths ranging between 1.0 mtr to 3.0 mtr. 

Application of Pre-Formed Membranes, in the basement requires protection during backfilling, Steel Binding and Concrete Pouring. Some manufacturers, in the recent years have started offering products for below the raft application, which they claim to not need any protection from Steel Binding and Concrete Pouring. Unlike Liquid Applied Membranes, Preformed Membranes have multiple joints and are not seamless. These are also not self-flashing at protrusions and junctions. Same is the case at the termination pr transition into another section of the building envelope. Being too heavy these are limited for application on the horizontal surfaces. Vertical single ply membranes are more difficult to apply then the Liquid Applied membranes. It is difficult to handle and joining the materials. The seams are lapped and sealed for complete waterproofing, particularly in small areas such as planters.

Different Types of Membranes are.

  • APP: The APP membrane, short for Atactic Polypropylene Membrane, is a special waterproofing material that is manufactured from Bitumen. APP membranes comes in rolls, measuring 10 mtr x 1mtr. With proper workmanship, the APP membrane is a very efficient and durable waterproofing material used in most constructions. It is a common material sed on concrete flat roofs. These are also used for waterproofing of concrete gutters, basements and retaining walls.
  • SBS: The SBS Membrane is a bituminous waterproofing membrane manufactured by blending a mixture of bitumen and SBS (Styrene Butadiene Styrene) polymers to obtain excellent waterproofing and low temperature flexibility properties. The polymerized bitumen is coated onto a dimensionally stable reinforcement core of non-woven spun bond polyester rot-proof fabric. The membrane has excellent tensile & tear strengths and is highly resistant to puncture. It is flexible and is suitable for applications where high structural movement is expected.
  • HDPE: HDPE Membranes are based on high-density polyethylene material, designed to provide water and water vapor protection to water excluding structures, securing concrete from aggressive ground salts and chemicals related corrosion.
  • TPO: Thermoplastic Polyolefin Membranes are single-ply roofing membranes that are one of the fastest-growing commercial roofing systems on the market. TPO roofing systems are made up of a single layer of synthetics and reinforcing scrim that can be used to cover flat roofs. TPO membranes are manufactured in sheets that are 10, 12, or 20 feet wide. These sheets are then rolled up and taken to the commercial facility. TPO has gained industry acceptance with the natural reflective surface to reflect UV rays. These are generally used in large Industrial and Commercial segments.
  • EPDM Rubber: EPDM is an extremely durable synthetic rubber roofing membrane (ethylene propylene diene terpolymer) used in various low-slope buildings and basements worldwide. Its two primary ingredients, ethylene, and propylene are derived from oil and natural gas.
  • Composite Plastic: Composite Plastic membranes bring sustainability to the construction industry, using recycled plastic. Anchor Grip Composite Plastic Membranes are plastic sheets with closely spaced L-Shaped locking extensions called Anchor Grips. These are best suitable for Basements and Retaining Walls.
  • Non-Bituminous Composite Membrane: is a membrane developed for internal and external waterproofing where a covering must be applied in areas like kitchen, toilets etc. where water ingress is expected. It consists of Bituminous compound reinforced and protected on both sides with Non-Woven Propylene. These are thin and flexible and are compatible with all cement screeds.

LIGHT WEIGHT AGGREGATE:

Nodullär aggregates are round with a coarse texture, off white/ivory colored with a cellular structure inside, is pelletized and processed resulting in a light, porous, aerated modules with a tough outer shell aggregate, used for roof/heat insulation. In addition, each of the Nodullär balls also acts to form of the geometric barrier which helps to displace and irradiates heat over a larger surface area the air entrapped thus, reduces the rate of heat transfer compared with dense, natural aggregates. The use of Nodullär in concrete improves, (i.e., reduces) the thermal conductivity. Therefore, the thermal properties of Nodullär have been used widely to improve thermal insulation in buildings and structures. IC (Internal curing) in Nodullär concrete is the process where increased hydration of cement occurs because of the availability of added internal moisture /water that is not part of the mixing water. Normally concrete is cured from the outside. IC is process which helps curing from the inside out. Internal water is supplied via internal reservoirs found in wetting lightweight aggregates. Time dependent improvement in the properties of mineral based light weight aggregates is greater than with normal weight aggregates. The reason is better hydration of the cementitious materials provided by moisture available from the slowly released reservoir of absorbed water within the pores of light weight aggregate

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SNP Technologies Pvt Ltd

C 414-415, 4th Floor
Nirvana Courtyard
Nirvana Country
Sector 50, Gurgaon 122018

+91 124 4234567

+91 9810096552

water@groupsnp.com