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Technoelast VB500 Self-Adhesive Vapour Control Layer

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£52.00 Incl. VAT
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Product Description

Technoelast VB500 is a cold-applied, self-adhesive vapour control layer. Technoelast is coated with a high quality SBS modified bitumen. The aluminium lined, foil face vapour control layer helps to control condensation and ensure optimum performance of roofing system components.

With an integrated aluminium foil layer, Technoelast is designed as a high performance vapour barrier. Technoelast is perfect for use on either metal profiled or plywood decking and in areas prone to increased temperatures and moisture levels.

Technoelast VB500 needs to be installed on a dry surface free of any oil, fat, dust and other impurities. Technoelast vapour control layer must be installed in accordance with manufacturers recommendations and, the relevant national standards, including BS 8217:2005.

Features & Benefits

  • Flame free, self-adhesive application
  • Mechanically resistant membrane
  • Simple & fast installation
  • Low temperature flexibility at -25 degrees
  • Aluminium lined
  • Withstands foot traffic

Product Specifications

Length: 10m, 20m, 30m, 40m 50m

Width: 1.08m

Thickness: 0.5mm

Water Vapour permeability: 1000 Sd, m

Reaction to fire: Class E (DIN EN 13501-1)

Product Documents

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WIDTH 1080mm LENGTH 10m

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Questions & Answers


Hi, what's the overlap required when laying this on a ply deck flat warm roof please?


We would advise to install with at least a 200mm overlap.


My garage roof is metal box profile sheets. Can this product be applied directly to the underside of the roof sheet? In this way, will this product contain condensation? How and when will the condensation be released?


Condensation forms where the cold and hot air meet, so really to reduce this you need to be insulating the roof not just applying a membrane.

Product Reviews

5 / 5 3 reviews
Reviewing Technoelast VB500 Self-Adhesive Vapour Control Layer Length 30m x 1.08m
1st November 2020
good stuff
Reviewing Technoelast VB500 Self-Adhesive Vapour Control Layer Length 20m x 1.08
20th February 2020
Used this product on a warm flat roof as first layer. It was very easy to roll out and stuck down no problems.
Anthony Smith
Reviewing Technoelast VB500 Self-Adhesive Vapour Control Layer Length 50m x 1.08
9th February 2020
The vapour barrier is very robust and does exactly what it should! My choice was not to use the primer as it was being held in place by the insulation and osb above! If you require good rather than minimal adhesion then use the primer.
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