Desmopol CB


Single component, pitch bitumen modified polyurethane waterproofing membrane

DESMOPOL CB is a single component liquid made up from pure polyurethane modified with pitch bitumen, which once catalyzed forms a continuous, aromatic, elastic membrane, without any joints, overlapping or any integrated mesh needs. Its properties make it an excellent choice for achieving air-tightness and perfect waterproofing on a multitude of surfaces and substrates. 

Download PDF data sheet . DESMOPOL CBTDS. Technical Data sheet Download all documents . DESMOPOL CBDownloads


The liquid membrane to use in these waterproofing situations:

  • roofs, terraces, balconies, and overhangs (walkable)
  • structural concrete slabs
  • concrete walls and foundations

NOTE: call our technical department about the application to other supports or situation

density at 23ºC 1,40 g/cm³ 
recommended thickness ± 1,5mm.
dry time at 23ºC ± 5~6 hours
tensile strength at 23ºC ± 2,3 MPa
elongation at break at 23ºC >600%
application methods By roll, brush  or airless equipment


  • DESMOPOL CB is a highly elastic and wear-resistant membrane that, once applied, offers great stability, durability, and waterproof 
  • Thanks to its versatility DESMOPOL CB adapts to any surface, making it the ideal product for application on uneven surfaces and in areas of any shape, whether curved or squared.
  • No surface reinforcement is required, only in detail works or encounters with other building elements.
  • Green roof application
  • Applying DESMOPOL CB saves in seals and any other kind of joins, as the finish is uniform and makes up a single layer, providing a surface with optimum maintenance and cleaning properties.
  • DESMOPOL CB membrane can be applied in an only a single layer (minimum thickness recommended 1,5 mm) by mixing with DESMOPLUS or DESMOPLUS 700  (at your choice), this fact upgrades their physical performances, increases the execution speed, and thus reduces the direct costs of the application, forms a solid membrane without bubbles inside. With this system, do not use an airless machine. Do not use this additive with temperatures above 35°C, or in any case, store the drums in cool and not sunny areas.
  • The DESMOPOL CB polyurethane membrane system should be applied in dry conditions avoiding the presence of humidity or water coming from the surface to be coated or the substrate, whether at the time of application or subsequently (pressure from phreatic water level).
  • If there is humidity or moisture in the substrate at the time of application, check the technical specifications of our primers where the maximum support humidity ranges are specified.
  • The DESMOPOL CB requires solar radiation protection (UV rays) because it is an aromatic membrane, so, in the absence of other physical protection elements, we recommended the application of our polyurethane-colored resins TECNOTOP 2C/2CP/1C.
  • DESMOPOL CB system's properties enable it to bond to any surface, such as cement, concrete, polyurethane foam, butyl, and bituminous sheets of wood, polyurethane plates, metal, etc.
  • DESMOPOL CB is immune to temperature changes of between -40ºC and +70ºC, conserving its elastic properties.
  • The DESMOPOL CB polyurethane membrane is a self-leveling membrane that requires additives for its application on vertical and sloped surfaces more than 1,5% of a gradient. Mix DESMOTHIX maximum ratio of 1 liter for each 25 kg of DESMOPOL CB. You could apply on thin several layers too..
  • Do not use airless equipment when you apply with DESMOTHIX or DESMOPLUS or DESMOPLUS 700  (at your choice)
  • Due to its resistance, it can be walked on and it will accept a rough finish to make it non-slip.(using SILICA SAND or TECNOPLASTIC range)


Recommended thickness is up to 1,5 mm, so the yield will be up to 2,4 kg/m² (DFT)applied on ONE or various coats, depending on the application method and application conditions.


Metal tins of 25 kg. each


12 months at temperatures between 41 to 95 ªF (5°C to 35°C), provided it is stored in a dry place, keep away from direct sunlight, extreme heat, cold, or moisture. Once the tin has been opened, the product must be used immediately


In general, you should take the following factors:

  • Surface reparation ( fill the cracks and fissures, remove old existing waterproofing paints...).
  • Clean up the surface, removing dust, oils and grasses,  and existing chippings.
  • Support will be strong and dry.
  • The supports must be firm and dry. No moisture or humidity inside or by capillarity from the backfill.

You can apply DESMOPOL CB liquid waterproofing membrane over several supports and materials. Below we set out some of the applications for the most common surfaces; for other surfaces not described, please call our technical department.

Concrete substrate

  • The concrete should be completely cured (concrete curing takes 28 days) or, in any case, the maximum level of humidity allowed for the substrate should be verified, depending on the primer used.

  • Any concrete latencies or release agents should be eliminated and an open pore surface achieved by grit blasting, milling, or sanding.

  • Any cracks and damaged areas must be repaired using an epoxy mortar, mixing our epoxy resin PRIMER EP-1020 with silica sand (ratio of ±1:4), or the same resin mixed with calcium carbonate (ratio of ±1:2).

  • MASTIC PU must be used on fissures or small cracks on the surface.

  • Existing joints or seals: remove the old material, clean up and fill with MASTIC PU and TECNOBAND 100 matting.

  • Next, clean up well and eliminate all contaminants from the elements, such as dust or chippings, using dry methods preferably.

  • Apply the primer in the conditions and the parameters indicated in the technical specifications for these products. On concrete, we recommended the two-component polyurethane resin PRIMER PU-1050 / PRIMER PU-1000 / PRIMER PUc-1050. See the TDS of each product before the application

  • Apply DESMOPOL CB  membrane depending on the chosen type (see "application types")


Once the surface preparation and primer application are done, as conditions, proceed to the extent of the polyurethane membrane, using the following method:

By layers application (traditional or classical application ):

  • Open the DESMOPOL CB metal tin and stir it up to homogenize
  • Extended the first layer using a short hair roller, maximum thickness 0,7 mm, (applying the material without dilution)
  • Wait for complete drying (depend on the weather conditions), about 5~6 hours
  • Then, apply the next layer, in the same way as above
  • Repeat this process as many times as necessary to achieve the desired or recommended thickness.

Single coat application (mixing DESMOPLUS or DESMOPLUS 700  (at your choice)):

  • Pour DESMOPLUS or DESMOPLUS 700  (at your choice)S inside the DESMOPOL CB metal tin, always in the fixed ratio supplied by the manufacturer. Continuous mixing with medium-speed mechanical equipment (pot life: ± 25 min.).
  • Pouring of the material formed directly on the support, and spread using Use of trowel, squeegee or rubber lip. (a roll can also be used too).
  • This process is unique, whereby the desired thickness is obtained in one operation, eliminating intermediate waiting times, ensuring the formation of the membrane without internal bubbles, getting more tensile strength, and reducing the global drying time.
  • The use of a mechanical equipment mix it’s not recommended when DESMOPLUS or DESMOPLUS 700  (at your choice) is used.
  • Don't add DESMOTHIX when DESMOPLUS or DESMOPLUS 700  (at your choice) is used.
  • Check all the waiting and drying times, application conditions (see the TDS)


  • Consult in all cases the waiting times, drying time, detail works, conditions of application of all the products through the technical data sheets of each product or consult our technical department.
  • For other types of supports/substrates, for further information on the execution application procedure, for any additional questions, please, consult the technical data sheets (TDS) of these products, or our technical department.
  • These guidelines are valid although they can be modified, according to the situation of the supports, conditioning of the bearing structures of the elements to be waterproofed, external climatology or situation at the time of application


In cases where the membrane repair by accidental causes, or assembly procedures not covered installations, shall be as follows:

  • cut, removal of the affected area and/or damaged surface
  • sanding this area extending about 20~30 cm. around the perimeter, for overlapping security
  • cleaning (vacuuming) of waste generated (powder, dust...); if it's possible don't use water, and if used, support humidity value; ketones applicability based solvents for reducing this type of surface cleaning
  • apply a thin layer (100-150 g/m²) of polyurethane resin PRIMER PU-1050, PRIMER EPw-1070
  • light spread SILICA SAND over the wet primer applied before
  • wait for the total drying
  • apply DESMOPOL CB with DESMOPLUS or DESMOPLUS 700  (at your choice)
  • apply TECNOTOP S-3000/2C/2CP/1C, in consumption and desired thicknesses in the case of no protection against UV rays. This application can be done by short hair roller type equipment "airless" (see the conditions of application in the product datasheet TDS)

In cases has been exceeded recoat time (24~48 hours), so the waiting time between jobs is prolonged, proceed as follows:

  • sanding strip longitudinal overlap of about 20~30 cm. wide
  • cleaning (vacuuming) of waste generated (powder, dust...)or existing dust; if it's possible, do not use water, and if it's used, check the support humidity value; ketones applicability based solvents for conducting this type of surface cleaning
  • apply a thin layer (100-150 g/m²) of polyurethane resin PRIMER PU-1050, PRIMER EPw-1070.
  • light spread SILICA SAND over the wet primer applied before
  • wait for the total drying
  • apply DESMOPOL CB with DESMOPLUS or DESMOPLUS 700  (at your choice)
  • apply TECNOTOP S-3000/2C/2CP/1C, in consumption and desired thicknesses in the case of no protection against UV rays. This application can be done by short hair roller type equipment "airless" (see the conditions of application in the product datasheet TDS)


These safety recommendations for handling, are necessary for the implementation process as well as in the pre and post, on exposure to the loading machinery.

  • Respiratory Protection: When handling or spraying use an air-purifying respirator.
  • Skin protection: Use rubber gloves, remove immediately after contamination. Wear clean body-covering. Wash thoroughly with soap and water after work and before eating, drinking, or smoking.
  • Eye / Face: Wear safety goggles to prevent splashing and exposure to particles in the air.
  • Waste: Waste generation should be avoided or minimized. Incinerate under controlled conditions in accordance with local laws and national regulations.

Anyway, consult the material and safety data sheet of the product (MSDS), or contact our technical department.


The DESMOPOL CB system may be complemented with the following products as a means of protection or to improve its physical-mechanical properties depending on its exposure, the desired finish, or the type of substrate.

  • PRIMER EP-1010: fillerized epoxy resin to be used to fill in depressions in concrete surfaces, rapidly providing a firm and fast drying even base
  • PRIMER EP-1020: mixed with silica sand (ratio±1:4), or calcium carbonate (ratio±1:2) this is used to fill in depressions in concrete surfaces, rapidly providing a firm and fast drying even base.
  • PRIMER PU-1050/PRIMER EP-1040/PRIMER EPw-1070/PRIMER WET/PRIMER PUc-1050 | PRIMER PU-1000 |PRIMER EP-1020: These primers are applied on the substrate beforehand to improve bonding and level the surface, as well as regulating the humidity in the substrate (see permitted levels in their technical datasheet).
  • TECNOTOP 2C: two-component colored aliphatic polyurethane resin used to protect roofs and floors or ground against UV rays when there is no other protection. (according to ETA 10/0121 and BBA 16/5340)
  • TECNOTOP S-3000: two-component, aliphatic, colored, cold polyurea resin for protection against UV rays, in situations of decks or floors without additional protection. Excellent for vehicular cover applications, quick-drying, and setting up.
  • TECNOPLASTIC F/C: this plastic powder, once mixed with TECNOTOP 2C, forms a rough surface, conforming even to norm ENV 12633: 2003(floors slipperiness), to achieve Class 3 (>45 slip resistance), depending on dosage (consult our technical department).
  • DESMOPLUS or DESMOPLUS 700  (at your choice): the additive that allows the application of the membrane DESMOPOL CB IN A SINGLE-USE. Especially in applications on humid or cold climatologies, improve mechanical properties, and reduces the membrane's drying and curing time(see TDS)
  • DESMOTHIX: the additive that provides thyrotrophic properties, specifically designed to be mixed with DESMOPOL CB to enable application on vertical surfaces.
  • TECNOBAND 100: the cold bond deformable band made up of an upper layer of non-woven textile and a lower layer of viscose self-adhesive coating, which together allow it to adapt to the shape of the substrate. This band is ideal when dealing with structural joints and overlapping metal materials.
  • TECNOBAND 200 FLEX: elastic, rubber band for structural joints with high movement
  • MASTIC PU: polyurethane mastic for filling joints and fissures (use together with TECNOBAND 100 when necessary).

NOTE: see all the TDS of all products, or consult our technical department




Specific gravity at 23ºC  ISO 1675

1,40 g/cm³

Viscosity at 23 ºC  ISO 2555

3.490 ±200 cps

Solid contents   ISO 1768


VOC(volatile organic compounds) 238 g/l
Tensile strength at 23ºC  ISO 527-3  ±2,3 MPa
Elongation at break at 23ºC    ISO 527-3 >600%
Hardness Shore A at 23 ºC   DIN 53.505 >80
Hardness Shore D at 23 ºC   DIN 53.505 >35
Initial dry time at 23ºC 5 -6 hours
Repaint time range 5 -48 hours
Roof slope zero slope
Fire reaction NPD
Anti roots YES(internal test)

Concrete adherence at 23ºC

>2 MPa

Results performed in the laboratory at 23ºC and 50% RH, under controllable conditions. These values may vary depending on the application, climatology or substrate conditions.