Water Proofing


ZENA-SEAL (ZSWP100) is a water proofing membrane developed by Zenith Rubber. The rubber membrane has 100 % EPDM polymer content making it an ideal choice for the water-proofing of roofs, swimming pools, foundations for civil constructions, soak pits for animal feed, gobar gas plants, canals, etc. With a life that spans 20 years ZENA-SEAL (ZSW100) is the best choice for waterproofing applications.

ZENA-SEAL (ZSWP100) is produced in accordance to ASTM D4637 and ASTM 6134. The sheet conforms to all requirements for non-reinforced black EPDM rubber sheet for use in waterproofing applications.

ZENA-SEAL (ZSWP100) is available in the following dimensions:

  • Thickness: 1mm to 1.5 mm
  • Length: 10 mtrs to 30 mtrs rolls
  • Width: 1 mtrs to 1.5 mtrs
  • Packing: Rolls are wound on 3 inch paper core with outer surface of rolls covered with HDPE

ZENA-SEAL (ZSWP100) single ply black membranes are light weight and have exceptional long lasting elasticity permitting the materials to withstand Building movement, Expansion - Contraction of Building surfaces, High resistance to Ozone and weather as they are known as “Crack-less Rubbers”, Low Specific gravity - lightest among all rubbers, Widest Temperature range from - 50°C to + 150°C, Excellent Steam and Water Resistance.

Rubber Sheets

Rubber Sheets

Technical Specifications     View PDF

Salient Features   

The Superior properties of EPDM WATER PROOFING

The life of any building is dependent on the designer recognizing and considering all the factors relevant to its location, shape, and function of the building. Reliable roofing is the most important part, which decides the quality & ultimately the life of the building. An efficient roofing sheeting should never allow even small traces of water to pass through at any given point and should maintain this characteristic over a long period of time. It should withstand slight movements of the structure, bad weather, chemical degradation and mechanical stress and strains.

ZENA-SEAL is the perfect solution, which meets the stringent requirement of good water proofing roofing sheet. In the long run it is more economical than traditional water proofing systems.

ZENA-SEAL has more waterproofing power than conventional material

EPDM sheet (with a thickness of 1.2 mm) is 22 times more powerful than asphalt and is 59 times more reliable waterproofing than PVC sheet.

ZENA-SEAL (ZSWP100) will take the “movement” of the structure

Since ZENA-SEAL (ZSWP100) sheet can be stretched (approx. 400%), it will not tear, crack or split but returns to the original position, without any damage to the membrane. ZENA-SEAL (ZSWP100) has an unfailing flexibility.

ZENA-SEAL withstands extremes of temperature

Because of the EPDM base polymer ZENA-SEAL (ZSWP100) is able to perform over a wide range of temperatures (-50° to + 150° C). ZENA-SEAL (ZSWP100) sheet does not become brittle in freezing weather nor soften in hot weather.

ZENA-SEAL is minimal extra load on your roof

ZENA-SEAL (ZSWP100) roofing sheet is one of the lightest roof membrane materials (with a specific gravity of approx. 1.25 kg/m2). It is highly suitable for lightweight structures and puts negligible extra load on roofs that are to be water proofed.

ZENA-SEAL (ZSWP100) lasts for more than 20 years

Presently in our country, asphalt based coating is employed in many buildings to protect the roof from leaking. However, the life of such waterproofing is limited and the coating has to be replaced every 2 to 3 years. Because of poor dimensional stability of asphalt in extreme temperatures we see many ruptures in the waterproofing. This is not the case with ZENA-SEAL (ZSWP100). With the water & weather resistance of EPDM, and good dimensional stability, ZENA-SEAL (ZSWP100) roofing sheets are designed to last to last for more than 20 years.

Maintenance Free Waterproofing

As the ZENA-SEAL (ZSWP100) EPDM Rubber Sheet does not deteriorate due to weather, heat, sunlight and oxidation virtually no maintenance is required for the roof.

Resistant to most of the acidic and alkaline conditions for wide range of temperature

As the EPDM rubber is highly saturated polymer, it has better chemical and environmental resistance than other available polymeric materials. Hence ZENA-SEAL (ZSWP100) can be used in chemical plants for their drainage and canal systems to avoid seepage through the RCC / CONCRETE work which in turn can damage surrounding fields. The following table shows the comparative properties of EPDM roof sheeting against other materials used for roof protection, which indicates superiority of EPDM roof sheeting.

Comparision Chart   

Properties ZENA-SEAL
EPDM Roofing
ZSWP 100
PVC Roofing Modified
Bitumen Roofing
BUR Roofing
built up
Roofing )
UV resistance E P-F F G
Ozone resistance E E F F
High Temparature
Cold Crack E F-G P P
Resistance to
Plasticizer Migration
Dimensional E P-F F F
Install over
existing roof
Yes Yes Yes No
NA = Not Applicable, E = Excellent, G = Good, F = Fair, P = Poor