Waterproofing Products

We are manufacturer and supplier of modified bitumen water proofing products, which are used to stop or prevent the leakage & seepage of rain water during monsoon. These 5 layered APP modified bitumen membranes are extremely used for flat and pitched roofs, metal roof, site cast reinforced concrete, cellular concrete, prefabricated concrete slabs etc.

The Great Bengal Felt

Waterproofing products - Roofing Felts The Great Bengal Felt (Hessian) is a high quality bituminous waterproofing membrane with Hessianascentrecore.lt conforms to IS: 1332:1993 type 3 Grade 1.
It is produced by saturating the centre core of hessian with straight grade bitumen and then coating it further on both sides with industrial grade oxidised Bitumen. Mica is then sprinkled on the bitumen on both sides to protect it from Ultra Violet rays and also to prevent adhesion.

The Great Bengal Felt (FG)

This has a fibreglass centre core instead of Hessian. Straight grade and oxidised bitumen are used for impregnating and saturating the centre core of the fibreglass. This conforms to IS 7193/1994 Cr. Both The Great Bengal Felt Hessian and FG are tested and tried waterproofing membranes and offer total impermeability to water. Both are easy to apply, easy to repair and maintain.

Uses

Both are used for basement and roof waterproofing and many different types of surfacing such as

  • Concrete
  • Asbestos / GI sheets
  • Timber
  • Shell / Folded plates
  • They are ideal for waterproofing of silos, grain godown, warehouses, buses etc.

Application Methodology:Surface Preparation
  • The surface should be thoroughly cleaned with wire brush.
  • Repair cracks, if any.
  • Apply Bengal primer on the surface.
  • Let the primer dry up. Then apply a coat of hot bitumen.
  • Rolls of The Great Bengal Hessian Felt should be laid over the hot bitumen and pressed properly to avoid air gaps.
  • A minimum overlap of 100mm and 75mm should be made at the ends and sides of The Great Bengal Felt respectively.
  • For double layer treatment, the joints between the two layers should be staggered.
  • A cement concrete fillet should be prepared at the junction of the roof and the parapet wall. The Great Bengal Felt should be fixed in groove (50 mm x 50 mm) made in the parapet wall. The groove should then be filled with cement mortar (1:4).
  • The top coat of stone grit or gravel (6mm size) should be laid by spreading hot bitumen and then laying the gravel over the bitumen.

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Bengal Supermat & Bengal Polyshield

Polyester waterproofing Membrane App Modified Waterproofing membrane with non woven polyester Mat Reinforcement Bengal SuperMat is one of the largest selling waterproofing membranes in India. It has a special multi-layered design that gives it superior flexibility, tensile strength and resistance to nature's elements. The multilayered design consists of a 160 gsm
Polyester Core coated on both sides with APP (Atactic Polypropylene) modified Bitumen which is finished with Polyethylene film on one side. The PE side is further coated with bitumen and then the resultant membrane is finished with Thermofusible film on both sides. This combination gives it excellent resistance to heat, ageing and ease of application.

Uses

SuperMat membranes are ideal for a wide range of waterproofing applications such as:

  • Roofs
  • Basements
  • Tarrace Gardens

SuperMat Membranes with Mineral Top Finish SuperMat also comes with Mineral Top finish. The upper surface is coated with minerals. The bottom surface, like SuperMat, has Polyethylene. The rest of the construction is similar to SuperMat.

Size and Thickness

Both SuperMat and SuperMat MT come in thickness of 3 mm and 4 mm and in rolls of 1 m x 10 m.

Salient Features
  • India's only Seven Layer membrane.
  • Total impermeability to water and extremely resistant to Ageing and Weathering.
  • Superior flexibility through a uniquely formulated coatant.

Application Methodology
  • Clean the surface thoroughly and apply Bengal Primer @ 0.3 liters per square meter.
  • Always start at the low point and progress to the high point on the roof.
  • The membrane should be installed perpendicular to the slope of the roof.
  • Unroll the membrane and ensure proper side laps.
  • Now reroll it and while standing on the unrolled portion, torch the exposed polyethylene side of the roller.
  • Push the roll forward with your foot and keep moving forward. The molten bitumen and the primer will ensure good adhesion.
  • The flame should be moved in shape of "L" applying about 75 percent of the heat to the roll and 25 percent to the substrate including the lap area of previously installed membrane. The flame should be moved from side to side and up the lap edge while membrane is slowly unrolled and adhered to the under lying surface.
  • Heat the overlap and use round tipped towel to seal overlap.
  • Excess compound should be smoothened and pressed into seam using hot trowel.
  • When one end is complete, reroll the opposite end install in exactly the same manner.
  • The end lap should be 100 mm and the side lap must be 75 mm.

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Bengal Aquaflexes

Bengal Aquaflexes Bengal Aquaflex is heavy duty APP (Atactic Polypropylene) modified polymeric waterproofing membrane manufactured to high standards. It is a five- layered membrane with a centre core of 100 micron. HMHDPE.

The centre core reinforcement protects against water and moisture and makes it totally impermeable. The centre core is coated on both sides with high quality polymeric bitumen with properties of high softening point, high heat resistance and cold resistivity. This makes it ideal for even heavy duty 'Waterproofing treatments'. The polymeric bitumen on both sides of the centre core is protected on both sides with thermofusible HMHDPE film. The finished membrane has an elongation of over 300 percent to absorb all structural movements.

Main Features
  • Good dimensional stability
  • Enhanced resistance to chemicals
  • Elongation exceeding 300 percent to absorb all structural movements
  • High tensile strength and cold flexibility
BENGAL AQUAFLEX WITH Aluminium Top (ALT)

Bengal Aquaflex is also available with 75 micron thick Aluminium foil on top. The Aluminium Top provides protection from UV rays, delays ageing and prevents disintegration of bitumen.

USES

Aquaflex is ideal for rooftops, basements and terrace gardens. It meets CPWD Specifications.

Method of Application
  • Clean the surface to make it smooth.
  • Apply a coat of Bengal Primer @ 0.3 liters per sqm on the clean surface.
  • This should be followed by a coat of hot applied Bengal Bitumen 85/25 @ 1.2 kg per sqm
  • Lay and press Bengal Aquaflex on the hot bitumen.
  • A minimum overlap of 100 mm is recommended between the two rolls of membrane to be sealed with blown bitumen.
  • Bengal Aquaflex is to be topped with screed or tiles as the case may be.

Outstanding Features
  • High softening point and high penetration.
  • High elongation.
  • Flexibility at very low temperature.

Dimensions of Aquaflex and Aquaflex Al (with Aluminium Top)
  Weight Length Width Thickness Approx.
Aquaflex 30 10 30 kg 10 m 1.0 m 2 mm
Aquaflex 40 10 40 kg 10 m 1.0 m 3 mm
Aquaflex 30 10 ALT 30 kg 10 m 1.0 m 2 mm
Aquaflex 40 10 ALT 40 kg 10 m 1.0 m 3 mm

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Bengal Polyflex

Bengal Polyflex Bengal Polyflex is a polymeric waterproofing membrane with centre core of 20 micron High Molecular High Density Polyethylene film coated on both sides with Polymer Modified Bitumen. The bitumen on both sides is further protected by a thermo fusible film.

Main Features
  • Good dimensional stability
  • Enhanced resistance to chemicals
  • Elongation exceeding 300 percent to absorb all structural movements
  • High tensile strength and cold flexibility
USES

Polyflex is ideal for rooftops, basements and terrace gardens.

Method of Application
  • Clean the surface to make it smooth.
  • Apply a coat of Bengal Primer @ 0.3 liters per sqm on the clean surface.
  • This should be followed by a coat of hot applied Bengal Bitumen 85/25 @ 1.2 kg per sqm
  • Lay and press Bengal Polyflex on the hot bitumen.
  • A minimum overlap of 100 mm is recommended between the two rolls of membrane to be sealed with blown bitumen.
  • Bengal Aquaflex is to be topped with screed or tiles as the case may be.

Outstanding Features
  • High softening point and high penetration.
  • High elongation.
  • Flexibility at very low temperature.

DIMENSIONS OF POLYFLEX
  Weight Length Width
Polyflex 25 20 25 kg 20 m 1.0 m
Polyflex 30 20 30 kg 20 m 1.0 m
Polyflex 35 20 35 kg 20 m 1.0 m
Polyflex 40 20 40 kg 20 m 1.0 m
Polyflex 45 20 45 kg 20 m 1.0 m

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