Sealing Technology
SEBflex® Dynamic Seal
Modern formwork construction is always seeking innovative solutions for sealing tension points. Our solution: SEBflex® Dynamic Seal
A novel high-tech material suitable for waterproof sealing of anchor rods and pipe spreaders both inside and outside. It can be individually applied for fiber concrete pipes, grounding electrodes, and plastic pipe spreaders.
This innovative technology is easy to use, 100% waterproof and radon-proof, tested by IAF & MPA!

SEBflex® Dynamic Seal Plug
The SEBflex® Dynamic Seal Plug (DSP) is a revolutionary, patented solution for sealing fiber concrete or plastic pipe spreaders (with various diameters). The cap of the plug is made from a special high-tech material that swells upon contact with water. This prevents water from penetrating the formwork spacer. Additionally, the DSP features a solid core that acts as a mechanical anchor, enabling the DSP to withstand water pressure up to 5 bar.
Hole sizes: 21.5 – 22.2mm
SEBflex® Dynamic Seal Donut
The hydrophilic Dynamic Sealing Donut (DSD) is made of synthetic, self-swelling high-tech rubber, which completely prevents the penetration of moisture. This makes the SEBflex® DSD the perfect solution for pipe spreaders surrounded by concrete. It prevents water from entering through the cracks in the concrete around the pipe spreader.
A regulated water barrier according to the DBV guideline prevents leaks.
Pipe ø 10-16mm , 24-30mm, 31-42 mm
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More InformationSEBflex® Dynamic Seal Pipe Strap
SEBflex® Dynamic Seal Strip Seal – specially developed for sealing plastic pipes in concrete structures.
The new SEBflex® Dynamic Seal Pipe Strap is made of hydrophilic synthetic rubber. It is designed for high-pressure water sealing of plastic pipes in concrete structures. Thanks to its intelligent design, it ensures the sealing of different pipe diameters. The innovative high-tech material achieves a volume expansion of 300% in regular rainwater and 250% in concrete water.
- Pipe dimensions: 70-90, 110-125, and 160-200 mm
- Quick, tool-free installation
- MPA tested
SEBflex® Dynamic Seal Tape
The SEBflex® Dynamic Seal Tape is an innovative development for sealing construction joints. The polyethylene-based tape, with impressive expansion capacity, is a revolutionary alternative to traditional bentonite swelling tape. The indestructible tape is resistant to abrasion and remains stable and reliable even after multiple wet-dry cycles.
Easy handling due to extreme elasticity, lightweight, and enormous expansion capability.
In addition to the standard version, there are special variants for:
- Use in seawater (salt concentrations up to 3%)
- Use in highly salty conditions (salt concentrations up to 10%)
- Use in rainy conditions (delayed swelling behavior)
- Use in contaminated water

SEBflex® Dynamic Seal Swelling Tape & Accessories
SEBflex® bentonite swelling tape is certified by MPA. It is made out of sodium bentonite and is used to seal cracks or construction joints reliably and permanently in watertight buildings.
How to use
SEBflex® bentonite swelling tape is perfectly qualified for range between low and high water level. You can easily and fast mount the SEBflex® swelling tape using the SEBflex® mounting glue, the SEBflex® mounting grid and/or the SEBflex® mounting nail. It will ensure a permanent and reliable seal up to 2 bar against sultry water.
SEBflex® Shuttering Elements
SEBflex® shuttering element (ABS) and waterbar cage for the shuttering of working joints in slabs, walls and ceilings.
The profiling of the shuttering elements fulfills the requirements of DIN 1045-1 to the “toothed” type of joints. The SEBflex® shielding elements are supplied ready for installation at the desired heights of 80 mm to 1500 mm, in the standard length of 2400 mm.
The cut-off plate has a diamond-shaped profiling, which achieves excellent bonding with the concrete.
Convincing Advantages::
- Ready for delivery
- Joint “toothed” to DIN 1045-1
- Type F – Waterproof up to 5 bar AbP 2 bar with test report
- Element height 150 mm
- Standard length 2400 mm
- Dimensions up to 2000 mm
- SEBflex® ABS with and without sealing elements
SEBflex® Shuttering Element Rough Joint

Dimensions: 80 – 199 mm
SEBflex® Shuttering Element Toothed Joint

Dimensions: 200 – 1000 mm
SEBflex® Waterbar Cage

Dimensions H/W: 120/130 mm, 120/100 mm, 150/130 mm, 150/100 mm
SEBflex® Coated waterstops
SEBflex® consists of coated individual elements. For concrete layers of only 3 cm, the special coating has been successfully tested to provide resistance against water columns of up to 20 metres. Any constructions joints, horizontal or vertical, when subject to either pressurised or non-pressurised water, can be sealed securely and reliably against water columns of up to 20 m using SEBflex®. SEBflex® has been tested and certified in accordance with the new WU directive for use in buildings rated in resistance category 1 and utilisation category A.
The installation instructions and excerpts from the WU directive issued by the
DAfstb (German Committee for Reinforced Concrete) should be consulted.
With the new add-on SEBflex® “2.0” we guaranty that the so called SEBflex® article has been proofed on 2 bar by the German MPA.
Advantages:
- quick and secure sealing of all construction joints without the expense of a concrete upturn beam
- quick and simple installation of the SEBflex® elements
- no special tools required
- provides water resistance against water columns of up to 20 m
- simple and secure connection of all the individual elements and points of intersection by just pressing the SEBflex® special coating together
- can also be easily connected to expansion joint and construction joint tapes via a special connector
- SEBflex® sealing system for planners of WU buildings
Steel joint-sealing sheets
High quality joint-sealing sheets made from black, bright and galvanised sheet steel. Complies with DIN* standards and the WU directive*. Sheets in standard dimensions certified for use in industry, metalworking and construction.
Advantages:
- High-quality product, certified as a manufacturing material by DIN **
- Versatile
- Certified as water-resistant in accordance with the WU directive*
- Special dimensions available for tunnels and engineering projects
- High level of stability compared with PVC and elastomer joint-sealing tape

Joint-Sealing Sheets – Blank Steel (Black)
Dimension: 1,0 – 2,0 mm x 150 – 300 mm
Ring Size: 30 m
Joint-Sealing Sheets – Galvanised Steel
Dimension: 0,6 – 2,0 mm x 100 – 300 mm
Ring Size: 30 & 50 m
Joint-Sealing Sheets – Stainless Steel
W.-NR: 4301 (V2A)
W.-NR: 4404 / 4401 (V4A)
on request
SEBflex® Perforated Tape
SEBflex® Perforated Tape is suitable for tensioning the lower anchorage of narrow strip or wide block foundations.
Our perforated tape is compatible with common formwork systems.
The end plate has a diamond-shaped profiling that achieves excellent bonding with the concrete.
Convincing advantages:
- Suitable for any foundation width – simply cut the required length from the roll
- Crosswise installation possible for block foundations
- Narrow strips can be used horizontally as foundation formwork
- Saves working space by eliminating tension rods
- Avoids collisions of formwork and reinforcement, as well as built-in parts, through the use of the perforated tape tensioner
- Anwendung Lochband
- Anwendung Lochband
SEBflex® Rib Mesh
Shuttering
Convincing Advantages:
- Cost-saving and fast shuttering of the working joints
- Can be used universally as a lost formwork in floor slabs, ceilings and walls
- Better bonding between several concrete sections due to special structure
- Dimensionally stable even when installed
- Lower concreting pressure compared to closed formwork
* DIN EN 10051 / DIN EN 10088-2 / DAfStb Directive (WU Directive) 10.2 (2) to (6)
** DIN EN 10130 Technical delivery conditions from the material
Further dimensions, qualities and finishes on request
Products can be different than pictured

SEBflex® Rib Mesh 4mm
Article-No. | Material/ Strength | Dimensions | Packaging | |
---|---|---|---|---|
L x H | Height | |||
8SFL | galvanised/ 0,25 mm | 250 x 60 cm = 1,5 m² | 4 mm | 1 Pack 20 Pieces= 30 m² 1 Palette 30 Pack = 900 m² |
* DIN EN 10051 / DIN EN 10088-2 / DAfStb Directive (WU Directive) 10.2 (2) to (6)
** DIN EN 10130 Technical delivery conditions from the material
Further dimensions, qualities and finishes on request
Products can be different than pictured
SEBflex® Rip Mesh 10mm
Article-No. | Material/ Strength | Dimensions | Packaging | |
---|---|---|---|---|
L x H | Height | |||
8SM3 | galvanised/ 0,30 mm | 250 x 60 cm = 1,5 m² | 10 mm | 1 Pack 20 = 30 m² 1 Palette 30 Pack = 900 m² |
8SM5 | galvanised/ 0,50 mm | 250 x 60 cm = 1,5 m² | 10 mm | 1 Pack 20 = 25 m² 1 Palette 30 Pack = 750 m² |
* DIN EN 10051 / DIN EN 10088-2 / DAfStb Directive (WU Directive) 10.2 (2) to (6)
** DIN EN 10130 Technical delivery conditions from the material
Further dimensions, qualities and finishes on request
Products can be different than pictured
SEBflex® Rip Mesh 21mm
Article-No. | Material/ Strength | Dimensions | Packaging | |
---|---|---|---|---|
L x H | Height | |||
8SHY3 | galvanised/ 0,30 mm | 200 x 45 cm | 21 mm | 1 Pallet 200 Pieces 180 m² |
8SHY4 | galvanised / 0,40 mm | 200 x 45 cm | 21 mm | 1 Pallet 100 Pieces 90 m² |
8SHY5 | galvanised / 0,50 mm | 200 x 45 cm | 21 mm | 1 Pallet 100 Pieces 90 m² |
* DIN EN 10051 / DIN EN 10088-2 / DAfStb Directive (WU Directive) 10.2 (2) to (6)
** DIN EN 10130 Technical delivery conditions from the material
Further dimensions, qualities and finishes on request
Products can be different than pictured
SEBflex® Pipe Penetrations
Schuhmacher SEBflex® pipe penetrations made of KG and KG 2000 for pressurized and non-pressurized water for installation in permanently waterproof structures.
Schuhmacher SEBflex® pipe penetrations are available in all nominal widths, construction forms, and for all wall thicknesses. The fully applied, cement-bound special coating demonstrably achieves a close bond with the concrete.
SEBflex® pipe penetrations are quickly and securely fastened to the formwork using an assembly aid.
Advantages of KG:
- Tested up to 5 bar (Test Report No. 2010-010), test report available upon request
- Better concrete bond due to special coating
- Double security through special coating and sealing profile
- Special sealing profile geometry
- No special tools required for installation
- Special sizes and various pipe materials available
Advantages of KG 2000:
- Polypropylen (PP)
- Smooth-walled
- Easy to install
- High abrasion resistance
- High impact resistance
- Durable
SEBflex® Sealing Collars
A Secure Hydrostatic Seal
The SEBflex® Sealing Collar is equipped with two stretch tapes made of stainless steel. This prohibits the water flow rate through the broad collar, when the pipe penetrations and lightning wires are embed in concrete. Thus no moisture along the pipe / the wire can penetrate into the building.
The SEBflex® Sealing Collars are certified by MPA and Radon-proof

Available Sizes:
Outer Pipe Dimensions from: 20 mm to 1400 mm
Outer Connection lug from: 18 mm to 1450 mm

Applicable for wires made for Foundation Earthing
Available Sizes:
7 mm to 10 mm
30 x 2 mm to 30 x 5 mm