Waterproof System Foundation & Tunnel

Waterproofing and water tightness  products and technologies for  civil engineering and hydraulics, foundations, tunnels, subway stations and underground parking, subways, underground tanks, filled with earth flat roofs,roof gardens, ponds.


G&P INTECH  has introduced in the market since 1989 several advanced technologies to solve problems of below -grade waterproofing foundations with long life expectation over 100 years.

The solutions adopted are active barrier systems, instead of passive barrier systems, able to interact with the fluid and prevent any infiltration  at any time during the life of the building.

The system include products  like  geomembrane BENTOSIL,  geosynthetic clay barrier marked     , hydroswelling sealing joints WATERSTOP  BZ 100, WATERSTOP  BZ 200, IDROSWELL,  IMPERGEN R-FLEX, IMPERGEN FLEX TUBE IFT.

The Company production line include osmotic materials for concrete waterproofing like CEMESEAL (water pressure resistant coating) , RAPID PLUG  (fast setting hydraulic compound), MACLIM (two-component flexible coating).

The main applications are on below-grade civil engineering constructions, foundations,  tunnels, subways, metro stations, underground parkings.



Geomembrane BENTOSIL marked CE

BENTOSIL is a needle-punched geosynthetic  clay  barrier consisting of a layer of low permeability sodium bentonite supported by two sheets of woven and no-woven polypropylene geotextile. The swelling material is a natural sodium bentonite which has a high grade for swelling (> 26 ml/2g) and a liquid limit value higher than 520%. The connection between the cover and carrier geotextile is achieved by a specific reinforcement system which anable the two geotextiles to be joined by thousands of fibres through the bentonite layer. This gives the barrier a perfect pre-confinement and increases the capability  to remain exposed before the final confinement is reached. At the same time the size of bentonite’s  particle allows a full saturation of geotextile under hydration and increases the self-seaming of geomembrane on the overlapping area.

The main technical characteristics of Bentosil marked CE according with EN 13491:2006 are the followings:

Non woven PP geotextile                               220 g/m²

Woven PP geotextile                                     120 g/m²

Swelling grade bentonite ASTM D 5890-95     >26  ml/2g

Thickness  geomembrane   EN ISO 9863-1     6 mm

Bentonite mass per unit area   EN 14196        5 kg/m²

Index Flux (liquid tightness)   ASTM D 5887    5E-9 m³/m²/s

Tensile strength   EN 10139                           12,5 kN/m

Static puncture resistance  EN ISO 12236       2 kN

Durability    EN 13438                                   > 25 years

Packaging                                                       BENTOSIL is available in rolls:

                                                                        Type 1:  roll 1,1x 5 m  (20 rolls per pallet)

                                                                        Type 3: roll 2,5×25 m – Type 4: roll 5×45 m



The high swelling capability of the natural sodium bentonite, combined with mechanical characteristics of geotextile, turn BENTOSIL a reliable product for below-grade waterproofing, even where boundary environmental conditions change (swelling/drying and freezing/thawing cycles) or where there are interacting polluted fluids ( remark: for application in contact with high salinity waters please contact Company  technical dept.). The installation is simple and fast due to the extreme adaptability of the roll. The system can be applied both in pre-casting and post-casting applications. Overlapping of geomembrane do not require any welding or mechanical intervention.

In vertical applications  and where need, BENTOSIL is installed by nail with wide heads and LDPE washers in the overlapping.

Horizontal applications: lay a poor concrete as subbase before applying  the roll. In case concrete will not be laid , compact the soil at 85% Modified Proctor, avoid cutting stone and fill  holes on the surface. The surfaces have  to be free, regular, clean and without standing water. Overlapping will be 15-30 cm according with work and size of roll.

Vertical applications: preparation of surface as above. BENTOSIL has to fixed in the overlapping by nail  with wide heads and LDPE washers, approx.  40 cm distance each.



G&P INTECH  has developed several hydroswelling  joints used in below grade constructions for the sealing of the vertical and horizontal joints, cracks and fissures.

The products are different according with the use and the technical characteristics required. For any additional information please contact Company technical dept.



Special hydroswelling preformed sealant with retarding treatment for sealing concrete joints  (cold joints, horizontal/vertical, prefab, construction joints). The gasket  is not designed for expansion joint of the structure. The sealant is high elastic, mechanical resistant  with water tightness up to 10 bar and high stability on working life.  WATERSTOP BZ 100 is applied by nail or glue PRIMER BZ for different surfaces as concrete,  steel, plastic, rubber. The surface has to be clean and smoothed before application.

Technical data:

Dimensions                                                     10×20 mm – roll   5 m

                                                                        20×20 mm – roll 25 m

Colour                                                             black

Tensile strength                                               > 2,5 MPa

Elongation at break                                           > 300%

Swelling ratio in water                                      400%

Working temperature                                       -30°C  +80°C



Hydrophilic joint sealant with retarding treatment composed of natural sodium bentonite (75%) and rubber (25%)  for sealing concrete joints (cold joints, horizontal/vertical, construction joints). The sealant is not designed for expansion joint of the structure. The sealant has a high capability of swelling  in the water and create a water barrier  sealing the concrete  joints up to 10 bar, with high stability on working life. WATERSTOP BZ 200 is applied by nail and washer and, if necessary, protected by a metal fastened profile SNET. Install the sealant with at least 5 cm from the exterior concrete border surface. The surface has to be clean, smoothed or slightly rough.

Technical data

Dimensions                         20×25  mm – roll 10 m

Colour                                 green

Elongation at break              7500 %

Swelling ratio in water          600%

Working temperature           -45°C  +120°C



Hydroswelling mastic water sealing for  concrete joints, pipes gasket, leakage. Due to high adhesion of the product can be used for sealing different type of material like concrete, steel, hard plastic, Waterstop BZ 100. The product has excellent characteristics of elasticity, swelling, water resistance and durability. IDROSWELL is applied by extrusion of  cartridge  or sausage.  Extrude continuously. Apply on clean surface. Avoid direct contact with water during the hardening time (10 h approx.).

Technical data

Packaging                           cartridge 310 ml – sausage  600 ml

Colour                                 gray

Tensile strength                   2,5 MPa

Elongation at break              650%

Swelling ratio in water          300%

Application temperature       > 10°C




IFT  is a preventative high mechanical resistant injection tube of 12 mm diameter for the permanent sealing of cold and construction joints in concrete, pipe penetrations and voids between slurry walls and slabs, etc. Where new and old concrete will join an injection tube is installed. When water is infiltrating into the joint, an  injection grout is injected through the PVC end pieces, which protrude out of the concrete at easily accessible places. This way the joint is sealed. Preferably, the injection will be executed after curing and setting of the concrete. The leaking joints can thus be permanently sealed. IFT  will be installed onto the hardened concrete during formwork installation. In case of rough surfaces, the gap between IFT  and the surface should be filled with IDROSWELL mastic.  The tuboline IFT  is cut to the required length (recommended maximum length is 6 metres). IFT is fixed on  the concrete with clips every 25 cm. Overlapping as per drawing.

For the installation and injection with IMPERGEN resin proceed according to the Company recommendations.

Packaging :  30 m. kit (included PVC hose, clips, bushes), Injection Resin excluded



IMPERGEN R-FLEX are hydroswelling injection resins used for waterproof sealing of cracks and fissures also no stable in walls, floors, concrete constructions, tunnels, parking, underground structures, etc. IMPERGEN is the injection grout for IFT hose.

The products are medium flexible  (R- free expansion 2000%)   and high flexible (FLEX- free expansion 800%)  according with the technical specific requirement on site. Normally IMPERGEN R  is used for injection on tuboline IFT. Injection pressure 15-180 bar.

The system guarantees a very high profile,  fast, chemical resistant and  durable solution for water leakage and water tightness in the concrete structure.

For technical information of installation and injection ask to the Company technical dept.

Packaging:  Impergen R-Flex : Resin pail kg 25 –  Accelerator  kg 2,3

Impergen Clean   pail kg 10







Osmotic and inorganic waterproofing coating for concrete surface water pressure resistant positive and negative up to 4 bar. The product is used for  concrete waterproofing of wells, tanks, canals, undergrounds structures, drinking water tanks (CEMESEAL  is certified  for drinking water). CEMESEAL is mechanical resistant, freeze/thaw cycle and salt resistant, long time durable.

The application is easy.  Temperature for application: +5°C + 35°C . Prepare slurry with clean water. Apply by brush in 2 hands. Consumption 2-3 kg/m². For any additional information ask to Company technical dept.

Colour: gray

Packaging: bags kg 25 – pallet kg 1200



Fast setting hydraulic compound (putty) to stop water leakage on concrete defective structure. The product set in few minutes stopping water leakage. Suitable for repair and sealing defective concrete of joints between walls and slab,  wells, tanks, honeycomb,  holes in bushing/manifold sections of pipes, underground structures. Do not use on expansion joints. RAPID PLUG  is stable, mechanical resistant, freeze/thaw cycle and salt resistant, long time durable.

The application is easy. Temperature for application  +5°C  +35°C.  Prepare putty  with clean water at the right temperature.  Apply by hand. Consumption upon request. For any additional information ask to Company technical dept.

Colour: dark grey

Packaging: plastic pail kg 10.  Bag upon request.





Two components inorganic flexible waterproofing coating for concrete structure available in two formulations MACLIM 100 and  MACLIM 200. The product is used for  concrete waterproofing of wells, tanks, canals, swimming pool,  external underground walls, drinking water tanks (MACLIM   is certified  for drinking water), terraces and balcony under tiles, shower box, etc. MACLIM  is mechanical resistant, adhesive to the support, freeze/thaw cycle and salt resistant, long time durable.

Technical data                                   MACLIM 100                   MACLIM 200

Adhesion to the concrete                   > 0,5 N/mm²                 > 0,9 N/mm²

Elongation at break                           20%                              40%

Water permeability (pos. press.)        > 0,1 N/mm²                 > 0,15 N/mm²


The application is easy. Temperature for application  +8°C  +35°C.  Prepare slurry adding Comp A powder with Comp. B liquid and mix  deeply by mechanical stirrer.  Apply by brush or trowel in two hands. Consumption 3-4 kg/m2. If needed, the Company supply elastic net MAC NET 50 to be laid between the two hands of product and  elastic strip MAC JOINT for joints. For any additional information ask to Company technical dept.

Packaging:   Comp A Powder kg  24 –  pallet kg 1152 – Comp. B Resin kg 8 – pallet kg 384

MAC NET 50    roll 50 m²  (1X50 m) – MAC JOINT    roll m. 25 (width 12 cm)