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Sikaplan® WT 4220-18 H

POLYOLEFIN MEMBRANE FOR POTABLE WATER TANK WATERPROOFING

Sikaplan® WT 4220-18 H is a polyolefin flexible, homogeneous, smooth sheet membrane. Thickness 1.8 mm. For temperatures up to +40 °C. Approved for potable water, the product provides a microbiological, soft and hard water resistant, durable and heat weldable membrane. Suitable for use in hot and tropical climatic conditions.

  • Approved for contact with potable (drinking) water
  • Contains no solvents, fungicides, heavy metals, halogens or plasticisers
  • Resistant against permanent water temperature up to +40 °C
  • Resistant to microbiological degradation
  • Flexible in cold temperatures
  • Suitable for contact with soft and hard water.  
  • Can be installed on damp and wet substrates
  • Heat weldable
  • Temporary UV stable (350MJ/m2 acc. EN 12224)
  • Bitumen resistant
Sikaplan® WT 4220-18 H
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Usage

  • Lining of enclosed potable water tanks
 

Advantages

  • Approved for contact with potable (drinking) water
  • Contains no solvents, fungicides, heavy metals, halogens or plasticisers
  • Resistant against permanent water temperature up to +40 °C
  • Resistant to microbiological degradation
  • Flexible in cold temperatures
  • Suitable for contact with soft and hard water.  
  • Can be installed on damp and wet substrates
  • Heat weldable
  • Temporary UV stable (350MJ/m2 acc. EN 12224)
  • Bitumen resistant

Packaging

Roll size

0.54 m (roll width) × 5.00 m (roll length) or

1.08 m × specified length

Unit weight

1.67 kg/m2

Colour

Surface

Smooth

Membrane thickness

1.80 mm

Colour

Blue

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

CE Marking and Declaration of Performance to EN 13361 - Geosynthetic barriers - Characteristics required for use in the construction of reservoirs and dams.

 

Product Information

Product Declaration

EN 13361 - Geosynthetic barriers for reservoirs and dams

Composition

Polyolefin (FPO-PP)

Shelf life

The product does not expire during correct storage.

Storage conditions

Product must be stored in original unopened and undamaged sealed packaging in dry conditions and temperatures between + 5 °C and + 35 °C. Protect from direct sunlight, rain, snow and ice, etc.  Store in a horizontal position. Do not stack pallets of the rolls on top of each other, or under pallets of any other materials during transport or storage. Always refer to packaging.

Effective Thickness

1,80 ( -5 / + 10 %) mm

(EN 1849 - 2)

Mass per unit area

1,67 ( -5 / + 10 %) kg/m2

(EN 1849 - 2)
System information

System Structure

Ancillary Products:

  • Sikaplan® WT 4220-15C, Sikaplan® WT 4220-15C Felt 500
  • Sarnafil® T Clean, cleaner for soiled membrane surface
  • Sikaplan® WT External/Internal Corner 90° preformed PE
  • Sikaplan® W Flat Profile Stainless Steel
  • Sikaplan® WT Fixation Plate PE light blue
  • Sarnafil® T Prep, cleaner for membrane surface preparation prior to welding
Technical Information

Tensile Strength

> 20.5 N/mm² (machine direction)

(ISO 527)

Elongation

≥ 700 % (machine/cross direction)

(ISO 527)

Burst Strength

≥ 50 % (D = 1.00 m)

(EN 14151)

Resistance to Static Puncture

~3.00 kN

(EN ISO 12236)

Permeability to Liquid Water

Pass (≤ 10-7 m3 × m-2 × d-1)

(EN 14150)

Foldability at Low Temperature

No cracks at -50 °C

(EN 495 - 5)

Tear Strength

≥ 120 kN/m (V = 50mm/min)

(ISO 34, method B)

Coefficient of Thermal Expansion

230 x 10-6 (±55 × 10-6) 1/K

(ASTM D 696 - 91)

Resistance to Oxidation

Change of tensile strength and elongation:

≤ 15 %

Microbiological Resistance

Change of tensile strength:

≤ 10 %

Change of elongation:

≤ 10 %

Resistance to Environmental Stress Cracking

≥ 200 h

(ASTM D 5397 - 99)

Resistance to Weathering

Remaining tensile strength and elongation:

≥ 75 %  (350 MJ/m2)

Resistance to Root Penetration

Pass

(CEN/TS 14416)

Application

Application Information

Ambient Air Temperature

+5 °C min. / +35 °C max.

Substrate Temperature

0 °C min. / +35 °C max.

 
Application steps

SUBSTRATE QUALITY

Substrates shall be clean, dry and free of all contaminants such as dirt, oil, grease, existing coatings, surface treatments, dust, loose friable particles, cement laitance and other poorly adhering materials.

Prior to the installation of Sikaplan® WT 4220-18 H. The substrate must be disinfected by spraying disinfectant Sikagard® SB, or similar.

If a cushion layer is not specified. Install a geotextile (non-woven fabric) with minimum density of 300 g/m2 beneath the membrane.

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