J-Flex is one of Europe’s leading suppliers of high performance silicone sheeting products. These include Vac-Sil® Quality Membranes – these silicone membrane sheet products are preferred for use on lamination equipment for forming or thermo-pressing photovoltaic panels, vinyl foil veneers on woodwork and composites in aerospace, F1 cars, marine and other general products.

Vac-Sil® Pro is our original & most popular Silicone Membrane sheet – combining hi-elongation, medium life cycle performance under controlled environments and very competitive pricing. It’s available with single or double sided fabric impression surface finish.


  • Unique Light Blue colour
  • Medium Life Cycle Performance
  • Most economic grade
  • Widely used in 3mm – but also 4.5mm
  • High Temperature +200°C

Check out our handy comparison guide here

▾ Vac-Sil® Quality Membranes - The Benefits

Vac-Sil® Quality Membranes are only available from J-Flex and offer users many advantages;

  • 1 piece seamless sheet width up to 3850mm wide (no weak joints or marks on lay-up)
  • Good reusability & durability when exposed to high pressures & elevated temperatures
  • Extraordinary “drawdown” stength & resilience
  • Laboratory controlled manufacturing & quality
  • Even flow of E.V.A encapsulants
  • Uniform pressure throughout solar lay-up

Need more information? In the Downloads section, you’ll find a full Specification Sheet and our Vac-Sil® Quality Membranes Brochure which includes; Installation Guide and Frequently Asked Questions.

Vac-Sil® is a Registered Trademark of J-Flex Rubber Products.

Why buy from J-Flex?

If you are looking for a friendly and helpful industrial rubber products supplier with great product knowledge and excellent customer service, then you’ve come to the right place.

We supply a vast range of quality items including rubber sheet and an array of fabrications made from premium grade elastomers including silicone and Viton™ – many of which are available for next day delivery.