BORNIT® Profi 1C Express

bitumen | thick coating | structural waterproofing | wall | PMBC
short information
  • very good sprayability with common spraying equipment
  • rational processing with high time savings
  • fast rain resistance and thorough drying
  • economical consumption due to high dry layer thickness
  • can be applied without mixing
  • crack-bridging after thorough drying
  • solvent-free, environmentally friendly
  • radon-proof
Profi 1C Express
32 ltr. / bucket
sufficient for:
EAN code
euro pallet
appox. 6.4 - 9.1 m²
4 017228 004969
18 bucket
  • approx. 3.5 - 5 l/m² depending on water impact class
  • adhesion of insulation panels: approx. 2 - 3 l/m²
storage note
  • store not below +5 °C, absolutely frost-free!
  • in originally sealed container storable for 12 months

status technical data sheet
10 December 2020

areas of application
BORNIT® Profi 1C Express is used for permanent, flexible external waterproofing of building structures in the area in contact with the ground and is applied with a trowel or spraying equipment. The product is suitable for application on horizontal and vertical surfaces.
BORNIT® Profi 1C Express can also be used for intermediate waterproofing (under screed) of floor slabs, balconies and terraces as well as for adhering rigid-foam insulation panels to bituminous and mineral substrates in the area in contact with the ground.
BORNIT® Profi 1C Express adheres well to all dry and slightly moist mineral substrates as well as bituminous substrates with sufficient stability (e.g., old cold and hot coatings or thick coatings).

type and properties
BORNIT® Profi 1C Express is a high-quality, single-component, polystyrene-filled and polymer-modified thick bitumen coating (PMBC).
The product is characterised by particularly fast rain-fastness and thorough drying. With its high proportion of solids, a high dry layer thickness (more than 90 % of the wet layer thickness) is achieved, with economical material usage.
BORNIT® Profi 1C Express is solvent-free and environmentally friendly.
After thorough drying, highly flexible, crack-bridging and waterproof foundation waterproofing is achieved, which is resistant to any aggressive substances naturally occurring in the soil.

Additionally, BORNIT® Profi 1C Express is radon-proof from dry layer thicknesses of 7 mm on.

BORNIT® Profi 1C Express is suitable for waterproofing according to DIN 18533 W1-E, W2.1-E, W3-E and

  • particularly fast rain-fastness and thorough drying
  • radon-proof
  • economical consumption due to high proportion of solids and high dry layer thickness
  • easy trowel application as well as sprayable with suitable equipment
  • highly elastic due to high-quality polystyrene and polymer modification
  • immediately ready for processing without mixing
  • after thorough drying, resistant to pressurised water and crack-bridging
  • with fully and flushly grouted masonry, no plaster layer required
  • adheres insulation panels to concrete, masonry and thoroughly hardened thick coatings
  • solvent-free, hence environmentally friendly

Step 1: The substrate must be free from ridges or shard-edged unevennesses as well as soil.
Step 2: Unfilled or badly filled depressions, such as masonry joints, mortar pockets or surface defects larger than 5 mm must be repaired with suitable mortar. No plaster layer is required for fully and flushly grouted masonry. Voids smaller than 5 mm as well as pores in the substrate can be closed by applying the thick bitumen coating in a scraping manner. Especially for concrete surfaces, application in a scraping manner is likewise recommended in order to avoid the formation of bubbles.
Step 3: It must be observed that the substrate is firm, clean, free from dust and free from separating substances. The substrate should be dry and absorbent. The surface temperature must be at least 3 Kelvin above the dew point temperature of the ambient air.
Step 4: A priming layer of BORNIT® Basement Primer or BORNIT® Unibit (diluted with water 1:2) must be applied to the substrate. For solidification of sanding substrates, priming with BORNIT® Solidificator SB3 (diluted with clean tap water at a mixing ratio of 1:1) is recommended. When applying the thick bitumen coating in a scraping manner, the primer must be applied in advance. A scratch coat does not replace the primer. After drying of the primer, the substrate is prepared for the application of the scratch coat or the thick coating, resp.
Important: During the construction phase, thick bitumen coatings can be damaged by water affecting their rear side. In principle, it must be ensured that the coating is not damaged by water affecting the adhesive side. If necessary, water-impermeable intermediate layers of mineral sealing slurry (e.g., BORNIT® Slurry SF) must be applied, which cannot be detached from the substrate by water pressure.

Upon processing BORNIT® Profi 1C Express, in principle, the current DIN 18533 must be observed. The processing of PMBC depends on the respective water impact class at the building object. Therefore, it must be observed that the water impact class present is clearly specified by the planner prior to the start of any work.
BORNIT® Profi 1C Express is delivered ready for use and applied to the substrate prepared as stated above using a notched trowel, smoothing trowel or suitable spraying equipment. BORNIT® Profi 1C Express must not be applied in case of frost or impending rain. Processing should be undertaken at object and ambient temperatures not below +5 °C and not above +30 °C. Application of the thick coating is undertaken according to the current DIN 18533 in two layers. Upon waterproofing against ground moisture and non-pressing water (DIN 18533 W1-E) and splash and capillary water (DIN 18533 W4-E), the layers can be applied fresh on fresh.

Upon waterproofing against moderately pressing water (DIN 18533 W2.1-E) and non-pressing water on ceilings covered with earth (DIN 18533 W3-E), the first waterproofing layer must have dried off to such extent prior to application of the second layer, that it is not damaged by the application. A reinforcing insert (BORNIT® Glass Fabric 165) must be embedded into the first waterproofing layer over its entire surface.

According to the current DIN 18533 standard, hollow fillets must be formed using a mineral material (BORNIT® Sealing Mortar) as an approx. bottle diameter-sized hollow fillet or with a two-component thick coating (BORNIT® Repabit, quick-drying) prior to the surface sealing. As a deviating, yet innovative and secure problem solution, here we recommend the use of BORNIT® Triangle Tape (bitumen profile, fusible) as an alternative. Special attention must be paid to proper execution of the waterproofing in the area of joints, connections and terminations as well as penetrations.

The fresh coating must be protected from rain and strong solar irradiation!
The waterproofing layer must be protected against damages. Protective and drainage layers, however, must only be applied after complete and thorough drying of the waterproofing layer (depending on weather and substrate, 2 to several days).

BORNIT® Profi 1C Express can be used to adhere insulation panels.
Suitable protective layers are, e.g., dimpled plastic sheeting with sliding film and filter fleece as well as thermally or bituminously bound seepage panels. Subsequently, the construction pit can be filled. In that, DIN 18533-1, Point 14 must be observed.

• for the water impact classes ground moisture / non-pressing water (DIN 18533 W1-E) as well as splash and capillary water (DIN 18533 W4-E):
approx. 3.5 – 4.0 l/m² = wet layer thickness 3.5 mm = dry layer thickness 3.0 mm

• for the water impact classes moderately pressing water (DIN 18533 W2.1-E) and non-pressing water on ceilings covered with earth (DIN 18533 W3-E):
approx. 4.5 – 5.0 l/m² = wet layer thickness 4.5 mm = dry layer thickness 4.0 mm

• adhesion of insulation panels:
approx. 2 l/m² with punctiform adhesion
approx. 3 l/m² with adhesion over the entire surface

The consumption figures stated are values based on practical experience.
The layer thickness allowance according to DIN 18533-3 must be observed.

layer thickness control
According to the current DIN 18533 W1-E and W4-E, a layer thickness test in the fresh state (wet layer thickness) at the execution object as well as an inspection of the thorough drying state at a reference sample located in the construction pit (e.g., a brick) must be performed. For waterproofing according to DIN 18533 W2.1-E and W3-E, the results of these tests must be documented. Water impact class according to DIN 18533 W1-E and W4-E Minimum dry layer thickness: 3 mm Water impact class according to DIN 18533 W2.1-E and W3-E Minimum dry layer thickness: 4 mm

product data in brief
product type
single-component thick bitumen coating (PMBC)
polymer-modified bitumen emulsion with special fillers
density at +20 °C
approx. 0.80-0.85 g/cm³
11.0 - 11.5
paste-like, suitable for trowel application
smoothing trowel, spraying equipment
processing temperature (ambient and substrate)
not below +5 °C and not above +30 °C
thorough hardening time
2 to several days, depending on air humidity, temperature, layer thickness and substrate
in the fresh state with water, in the hardened state with BORNIT® MultiClean Spray, BORNIT® MultiClean or BORNIT® Bitumen Cleaner
store not below +5 °C, absolutely frost-free!
shelf life
in originally sealed container storable for 12 months
GISCODE link comp. A
VOC category
actual permissible VOC content
0 g/ltr.
substances hazardous to health in terms of the ordinance on hazardous materials
hazard class according to ADR
boiling start and Boiling range
+100 °C
Water impermeability
impermeable at 0.75 bar over 72 hours
Water vapour diffusion factor µ
approx. 8000 (according to DIN EN 12086)
SD value (m)

health and fire protection, occupational safety
To ensure safe handling of the product, the physical, safety, toxicological and ecological information provided online, the information in the current safety data sheet and the additional information on the label must be read and followed before purchasing or using the product! The applicable regulations, ordinances and laws must be complied with.

In case of doubt, please contact the BORNIT® application technology department or the BORNIT® service hotline on +49 375 2795 123.

In originally sealed containers storable for 12 months. BORNIT® Profi 1C Express must be protected from frost! Thermal impact above +30 °C and direct solar irradiation must be avoided.

disposal note
Only recycle completely empty containers. Material residues can be disposed of according to AVV-ASN: 080410 (waste adhesives and sealing compounds except for those falling under 080409).

The above information replaces all previous technical information about the product. Thus, this information is no longer valid. The details have been compiled according to the latest state of application technology. Please observe, however, that, depending on the state of the construction object, deviations from the method of application suggested in the datasheet may be required. Unless agreed otherwise in individual contracts, any information contained in the datasheet shall be non-binding and thus does not represent an agreed product constitution. We reserve the right to any changes in the information contained in this datasheet anytime.
BORNIT<sup class=® Profi 1C Express, thick coating, foundation, waterproofing ">
BORNIT<sup class=® Profi 1C Express, thick coating, foundation, waterproofing, spraying application">


BORNIT-Werk Aschenborn GmbH
Reichenbacher Straße 117
08056 Zwickau / Germany



EN 15814:2011+A2:2014
Polymer-modified thick bitumen coating
for waterproofing building components in contact with the ground

Water tightnessW2A
Crack-bridging capabilityCB2
Resistance to waterPassed
Flexibility at low temperaturesPassed
Dimensional accuracy at high temperaturesPassed
Fire behaviourClass E
Compressive strengthC2A
Durability of water tightness and fire behaviourFulfilled

Determination of the radon diffusion coefficient and the diffusion length of a test specimen made of BORNIT® Profi 1C Express | Project number: 190409-09 | 02.05.2019


No dangerous good in sense of these transport regulations.

Hazard-determining components for labelling

EUH208: Contains 1,2-Benzisothiazol-3(2H)-on. May produce an allergic reaction.

recommended, personal protective equipment: