Our identity

The advantages of welding by hot vulcanisation

In order to provide you with a perfectly waterproof membrane all the welding is done in the factory by hot vulcanisation. Manufacture by hot vulcanisation is the most qualitative technology for producing a weld between two elastomers.

To produce a perfectly watertight prefabricated rubber membrane we weld several EPDM panels to each other by vulcanisation.
We place two panels one on top of the other and then insert a band of tape (crude EPDM) which will make it possible to perform the vulcanisation by cross-linking (fusion interlinking the material molecules).
The assembly is pressed automatically by a robot to obtain perfect, indestructible and controlled welding, thus creating a perfectly waterproof, ultra-resistant assembly. After vulcanisation the assembly becomes a single, homogeneous material both physically and chemically.

• Ultra-resistant, indestructible assemblies
• Perfect waterproofing, 100% guaranteed.
• Perfect homogeneity between the various panels making up the finished product
• Mechanical resistance of the original sheets reinforced by the total cross-linking (fusion) of the material in the welds.

Welding by hot vulcanisation

The 10 stages in the prefabricated rubber membranes

1 Manufacture of the membrane in 2 dimensions

2 Membrane ready for production in 3 dimensions

3 Preparation of the corners

4 Membrane in 3 dimensions awaiting vulcanisation

5 Welding of the corners and details in 3 dimensions by vulcanisation

6 Corners prefabricated in 3 dimensions

7 Finalised piece in 3 dimensions

8 Folding and rolling of the membrane

9 Piece rolled awaiting logistics preparation

10 Finalised pallet ready for shipping

• 1996
• 1997
• 1998
• 2001
• 2004
• 2007
• 2012
• 2013
• 2014
• 2015
• 2016

• Creation of the company, Bretagne Emballage, dedicated to the plastic film trade for building and public works, industry and agriculture.
• Launch of the Cultisol brand for products for cultivation under plastic, especially for the public gardens sector.
• Launch of Geokit®, 1st complete kit of films and geotextiles for waterproofing autonomous waste water treatment networks.
• Bretagne Emballage officially becomes Cultisol, dedicated to trade in and processing of plastic films for buildings and gardens, organised around two specialist divisions: Professional Buildings and Public Gardens.
• Cultisol sets up a research and development programme for developing biodegradable films, the aim being to create a complete range for the general public network. Second enlargement of the Cultisol production site.
• Launch of the activity of manufacturing waterproofing pieces in EPDM and acquisition of a tool for production by hot vulcanisation which is unique in Europe.
• Transfer of the public garden activity to the Vilmorin group. Setting up of an R&D Department which specialises in elastomers, recruitment of a new materials engineering specialist.
• Refocussing on the flexible elastomer structure businesses with the launch of the EPDM 3D roof range.
• Creation of the Export Department. Launch of EPDM flexible tanks and ranges for waterproofing façades and foundations
• Cultisol changes its name and becomes Flexirub from 1st May 2015, making a link between its name and its business. Development of new technical elastomer-based products.
• Flexirub is 20-years’ old and obtains the (CSTB - Science and Technical Centre for Building) technical approval for roof waterproofing.