BORNIT® Profi 1C Express
bitumen | thick coating | structural waterproofing | wall | PMBC

- 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
- approx. 3.5 - 5 l/m² depending on water impact class
- adhesion of insulation panels: approx. 2 - 3 l/m²
- store not below +5 °C, absolutely frost-free!
- in originally sealed container storable for 12 months
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).
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
W4-E.
- 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 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.
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 sunlight!
We recommend using BORNIT® 2C Flex Bitumen Thick Coating or BORNIT® Profi Hybrid 2C in conditions of high humidity, impending rain, or cool weather.
The dried sealing must be protected from damage and UV radiation. Protective and drainage layers should only be applied after the sealing layer has completely dried (2 to several days, depending on weather conditions and the substrate). BORNIT®-Profi 1C Express can be used to bond insulation boards. Suitable protective layers include plastic dimpled membranes with a sliding film and filter fleece, as well as thermally or bituminously bonded drainage boards. The backfilling of the excavation should be carried out promptly. DIN 18533-1 Section 14 must be observed during this process.
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 provided consumption figures are practical experience-based values.
The consumption for the required scratch coat depends on the roughness of the substrate and must be calculated separately.
The thickness allowance according to DIN 18533-3 must be taken into account.
Product data in brief
In case of doubt, please contact the BORNIT® application technology department or the BORNIT® service hotline on +49 375 2795 123.


1023
BORNIT-Werk Aschenborn GmbH
Reichenbacher Straße 117
08056 Zwickau / Germany
14
10404/2016
EN 15814:2011+A2:2014
Polymer-modified thick bitumen coating
for waterproofing building components in contact with the ground
PMB - CB2-W2A-C2A
Water tightness | W2A |
Crack-bridging capability | CB2 |
Resistance to water | Passed |
Flexibility at low temperatures | Passed |
Dimensional accuracy at high temperatures | Passed |
Fire behaviour | Class E |
Compressive strength | C2A |
Durability of water tightness and fire behaviour | Fulfilled |