Sheet Membrane for waterproofing of drinking water

sikaplan waterproofing sheet for potable water tank

This is a solution for waterproofing drinking (potable) water facilities with Sikaplan WT sheet membranes.

Drinking Water Membrane Product Range

Sikaplan WT 4220 – 15 C light blue

Waterproofing sheet based on Polyolefin (TPO), stabilised with woven fabric. The plan membrane is not resistant to (UV/IR) rays.

Sikaplan WT 4220 – 15 C Felt 500 light blue

Waterproofing sheet based on Polyolefin (TPO), stabilised with woven fabric and backed with PP-based fleece 500g/m2 for Velcro fixing system. The product is not resistant to (UV/IR) rays.

Sikaplan WT 4220 – 18 H light blue

Homogeneous waterproofing sheet based on Polyolefin (TPO) for detailiing works. The membrane is not resistant to (UV/IR) rays.

6 6
Product Guide
For lining of potable water tanks
and reservoirs
Product Use
Sikaplan WT 4220 – 15 C light blue general waterproofing of water
reservoirs (loose laid and perimeter
fixed)
Sikaplan WT 4220 – 15 C Felt 500
light blue
general waterproofing of water
reservoirs (mechanically fixed with
Velcro strips)
Sikaplan WT 4220 – 18 H light blue waterproofing of details to
Sikaplan WT 4220 – 15 C / -15 C Felt
Sikaplan WT internal/external corner
pieces
preformed and homogeneous
membrane pieces for corner details
Sikaplan WT fixation plate PE light blue PE strip for linear fixings and
terminations of
Sikaplan WT 4220 – 15 C / -15 C Felt

Product Guide for lining of potable water tanks and reservoirs

Sikaplan WT 4220 – 15 C light blue: general waterproofing of water reservoirs (loose laid and perimeter fixed)

Sikaplan WT 4220 – 15 C Felt 500 light blue: general waterproofing of water reservoirs (mechanically fixed with Velcro strips)

Sikaplan WT 4220 – 18 H light blue: waterproofing of details to Sikaplan WT 4220 – 15 C / -15 C Felt

Sikaplan WT internal/external corner pieces: preformed and homogeneous membrane pieces for corner details

Sikaplan WT fixation plate PE light blue: PE strip for linear fixings and terminations of Sikaplan WT 4220 – 15 C / -15 C Felt

Overall membrane requirements

– Resistance to cleaning agents
– Resistance to chlorine and ozone
– Resistance to algae and micro-organisms
– Resistance to hydrostatic pressure
– smooth appearance of surface
– no leaching from membrane into water
– no affect on drinking water quality
– easy and reliable to install
– long life expectancy

Construction requirements

Requirement to substrates prior to membrane installation

Concrete (incl. mortar screeds)

-horizontal: steel trowel finish
-vertical: formwork finish free from honeycombing
-free of protrusions, dust and loose particles
-free of formwork-oil and grease
-reinforcement steel cover > 30mm
-all penetrating steel elements in stainless steel
-surfaces disinfected i.e. with sodium hypochlorite 15%
(soluted 10% in water) as per water authority

Steel

-free of protrusions, dust and loose parts
-free of oil and grease
-all pentetrating steel elements in stainless steel
-surfaces disinfected i.e. with sodium hypochlorite 15%
(soluted 10% in water) as per water authority

Quality Control

Quality Control according to ISO 9002 demands for basement waterproofing to check:

  • substrate conditions are as specified
  • products supplied to site are as specified
  • application procedure is according to manuals
  • control of installed product for watertightness
  • inspection and acceptance of applied product by clie
  • suitable protection of applied product

These measures ensure the prevention of leaks!
Quality Control on site is the responsibility of the waterproofing contractor

CHECKS FOR INSTALLATION OF SHEET MEMBRANES:

  • Membrane products delivered to site: Acceptance of substrates
  • Identification of products and quantities are as ordered: Report on waterproofing works
  • Conformity of delivered products with specifications: Recording of welding parameters
  • Control of membrane storage on site: Quality Control of welded seams