Fondafor / Fondafor S

Torchable elastomeric bitumen membrane for exterior waterproofing of underground walls

Made of SBS elastomeric bitumen, surfaced by slate chips (Fondafor) or a non-woven film (Fondafor S), with a root-inhibiting additive. Side laps are designed with a scarified fusible protection, and the bottom face with a fusible film.

Fondafor is used alone or with Prim'Nap/ Fonda GTX (protection and drainage boards), providing complementary protection and/or drainage.

Suitable for:

  • Exterior waterproofing of underground walls of concrete or masonry, coated or not, of residential premises 
  • Waterproofing of earth retaining walls, stairway ramp walls, consolidated plantings, etc

Use our solution guide to select the right system for your waterproofing needs.


High resistance to cracking, to puncturing, to nail-tearing and root-penetration
Traditional welding by propane-torching
Single ply, easy to install


Length (m) : 8
Width (m) : 1
Thickness (mm) : 3.2
Weight (kg) : approx. 40.1

Documents Type
Fondafor Datasheet EN Technical Datasheet English Download
Fondafor Datasheet FR Technical Datasheet French Download
Fondafor Underground Waterproofing & Tanking EN System Brochure Download
Fondafor Product Description FR Product Description French Download
Fondafor S Datasheet EN Technical Datasheet English Download