For Flat, Curved & Sloping Roofs

For Flat, Curved
& Sloping Roofs

25 Year Guarantee

25 Year

Specialist Advice & Support

Specialist Advice
& Support

Express National Delivery

Express National

We've waterproofed 180m SqM of roofs!

We've waterproofed
180m SqM of roofs!

Request a sample

a sample


Evalastic-V® comes with a fleece backing as a compensation layer - perfectly suited for mechanical fastening or bonding with alwitra adhesive.

  • Service temperature range -40°C up to +­100°C
  • High-quality EPDM membrane
  • Absolutely free from bitumen, plasticizers, PVC, chlorine or the like
  • extremely high resistance to low temperatures


Superior Fleece-Backed Single-Ply Waterproofing

EVALASTIC®-V is an eco-friendly roofing membrane that is free from bitumen, chlorine, plasticisers & PVC. Produced from hardy Ethylene-Propylene-Copolymer (EPDM/PP synthetic rubber), it offers excellent resistance to roots, chemicals and the climate. Fully compatible with bitumen, it also holds great low-temperature flexibility.


As used on landmark architecture throughout the world

Environmental Product Declarations

First in the industry to introduce Environmental Product Declarations 


Trusted by architects, roofing contractors & developers

BBA Accredited

BBA Accredited

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  • Flat Roofs
  • Curved Roofs
  • Sloped Roofs
  • Mansard Roofs
  • Dormers


  • Exemplary lifecycle assessment results
  • Fully recyclable
  • Compatible with all kinds of insulation
  • homogeneous on-site seam welding by simple and environmentally friendly hot air jointing

Product Details Back to top

Product Specification

Properties  Measurement
Effective thickness of waterproofing layer (mm) 1.2 / 1.5

Width (m)
- with welding edge on one side
- with welding edge on both sides

1.05 / 1.55
1.05 / 1/59
Lengths (m) 25
Specified lengths on request
Standard colours  light grey
Special colours on request

Technical Data

Properties  Testing Method  Unit  Evalon VSK Results
Visible Defects EN 1850-2   passed
Effective Thickness (eeff)of waterproofing layer EN 1850-2 mm 1.2 / 1.5
Water tightness EN 1928 (B) kPa  ≥ 400
External Fire Performance ENV 1187 CEN/TS 1187   class BROOF (t¢) Resistant to flying sparks and radiant heat, confirmed by General Building Construction Supervision Test Certificates
Reaction to Fire EN 13501-1   class E
Joint Peel Resistance EN 12316-2 N/50mm  ≥ 150
Joint Sheer Resistance EN 12317-2 N/50mm ≥ 200
Max. Tensile Force EN 12311-2 (A) N/50mm ≥ 500
Elongation at Max. Tensile Force EN 12311-2 (A) % ≥ 60
Resistance to Impact Load EN 12691 (A) mm ≥ 300
Resitance to Static Load EN 12730 (B) kg ≥ 20
Tear Resistance  EN 12310-1 N ≥ 300
Tear Resistance EN 12310-2 N ≥ 150
Resistance to Root Penetration  EN 13948   passed
Dimensional Stability  EN 1107-2 % ≥ 0.5
Low Temperature Flexibility EN 495-5 °C ≥ -40
Durability (UV Exposure, High Temperatures & Water EN1297 Visual Control passed
Durability of Water Tightness Against Artificial Aging EN 1296 EN 1928 kPa ≥ 60
Durability of Water Tightness Against Chemicals incl. water EN 1847 EN 1928 kPa ≥ 60
Hail Resistance EN 13583 m/s ≥ 17
Water Vapour Permeability  EN 1931 µ approx. 100,000
Ozone Resistance EN 1844   passed
Bitumen Compatibility EN 1548   passed


Certifying body Testing 
State Material Testing Institute, Darmstadt, Germany External quality control - Certificate of conformity according to DIN EN 13956 and DIN EN 13967
DEKRA Certification GmbH, Stuttgart Comprehensive external quality control of the product system

Gesellschaft für Materialforschung und Prüfungsanstalt für das Bauwesen Leipzig mbH (MFPA Leipzig GmbH), Germany


Warringtonfire Gent (Belgium)

Materialprüfungsanstalt Universität Stuttgart, (MPA Stuttgart)

Certificate (AbP) according to DIN 4102-7 (Resistance to flying sparks
and radiant heat) as well as DIN V ENV 1187resp. DIN CEN/TS 1187, testing method 1 (exposure to external fire) with classification according to DIN EN 13501-5 resp. AbP

Tests according to DIN 4102-1 (building material class B2) and

DIN EN ISO 11925-2 with classification according to DIN EN 13501-1 (class E)

Environmental Product Declaration EPD‘s for various application methods and material thicknesses according to ISO 14025 and EN 15804 corresponding to the guidelines of the Institute of Construction and Environment (IBU)
Research institute, Field of Landscaping, Geisenheim, Germany Testing according to FLL 99 (root/rhizome penetration resistance)
Union Belge pour l’agrément technique dans la construction (UBAtc), Brüssel (B) ATG approval according to UEAtc Technical Guide for waterproofing systems made of EPDM
SGS Intron Certificatie B. V. Culemborg (NL) KOMO attest-met-productcertificaat according to BRL 1511 deel 1 + deel 4
Groupe Qualiconsult, Vélizy-Villacoublay (F) Cahier des Clauses Techniques (CCT)


Alwitra was the first enterprise of the industry to introduce relevant Environmental Product Declarations of the Institute Construction and Environment (Institut Bauen und Umwelt e. V. - IBU) for the EVALON® and EVALASTIC® waterproofing membranes.
For certifications according to DGNB, LEED or BREEAM Alwitra provides appropriate product fact sheets.


Download Environmental Product Declaration


Applications Back to top


Loose Laid with BallastLoose Laid
with Ballast
Gravel, roof garden, concrete paving slabs
Mechanically FastenedMechanically
In the seam overlap or with field fastening
With compatible adhesives
With compatible primer
non ventilated roofs (warm deck roofs)





ventilated (two layer) roofs (cold deck roofs)






Installation works must be carried out only by trained Alwitra roofing contractors. 
Would you like to become a dedicated Alwitra roofing contractor?
We can provide the necessary training on the installation of our products. 

Find out more

Case Studies Back to top

Want to become an alwitra® accredited installer?

  • High-quality training
  • Become accredited
  • Receive new business leads from alwitra®

Apply Today

Our membranes are used by architects, contractors & developers. View all

Archdiocese of Liverpool
Coventry City Council
3D Reid
Balfour Beatty
Aloft Roofing & Leadwork
Fife Council
Angell Thompson
Alec French Architects
Ashtree Roofing
English Heritage
Glasgow Housing Association
Coomber Associates
Bay Roofing SW Ltd

Need expert advice or just have a question?

Our specialists are here to support you.
Just ask.

Contact Us 01202 785200

Here's what some of our clients have to say...

We have been alwitra® contractors for many years and have always been impressed with the results and reliability of the product. The customers…

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I, James Hopkins Director of JH Specialist Roofing install single ply membranes on a daily basis, we as a company have tried numerous types of…

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We have used VSK extensively over the last 5 years, we have found it to be a great product and really good for complex detail work. We find using…

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As a small flat roofing business carrying out mostly domestic refurb work and small extensions Evalon vsk is our preferred single ply membrane…

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We have been an approved contractor for many years, the level of customer service and the quality of the products provided by ICB (Waterproofing) is…

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We have worked with ICB on several occasions and we would thoroughly recommend them for their high level of professionalism and efficiency. The team…

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OB Architecture

ICB provides an excellent service with all the professional back-up required at the development stage through to completion. The manner in which you…

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I am pleased to recommend ICB as Company, through my personal experience and that of my Business, for the following reasons: They are an easy Company…

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We believe, as one of your approved contractors, over the years we have had a great working relationship with yourselves. When working on projects…

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Best system on the market –VSK all the way!!!!!!


…that’s the beauty of this membrane, (you) can complete field sheet and upstand in one go, nice and tight and (a) crisp finish in the…

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alwitra® is a lovely membrane when you have some detailing and gutters as you can go all the way through in a oner…


alwitra® Evalon VSK! Surely the best membrane ever invented.


This product has to be the most versatile single ply system we have used. Unbeatable finish.

Lee Orchard

Evalon VSK – such a quality and versatile membrane.

Lee Orchard

In my mind the best single ply.


Can’t beat VSK


We find all the staff at ICB, friendly, helpful & knowledgeable.


Evalon VSK! Surely the best single-ply waterproofing membrane ever produced! A++++


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