Roof Rehabilitation


BORNIT® Roofing Mastic

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quick facts

BORNIT® Roofing Mastic
Filler compound based on polymer-bitumen for high-quality repairs anywhere on the roof, usable for joints at antennas, chimneys, skylights, etc. Resistant to cold, heat, overbands cracks, cold workable, contains solvents.

Color: black

4 017228 004402 6800000409 310 ml
20 cartridges per box
approx. 12 m/cartridge for joint crosssection of 5 x 5 mm
bitumen dachspachtel 310ml 150px

detailed information

BORNIT® Roofing Mastic is a highly elastic bitumen knifing filler, which is resistant to non-oxidising acids. It contains stabilising additives, as well as additives which prevent settling.

Area of use
BORNIT® Roofing Mastic is used to insulate horizontal surfaces, as well as vertical surfaces (the termination of the insulation). It has good gripping properties on concrete, iron and sheathing felt. BORNIT® Roofing Mastic can be used to insulate the connection of roofs and chimneys and so on.  
BORNIT® Roofing Mastic is also successfully used for hydro-insulation in the area of water collection tanks. When applied to concrete, masonry and plaster, a primer coating must be applied using BORNIT® Bitumen Bonding Primer.  

Product features
• is ready for immediate use
• it is  economical and cost affective thanks to the simple equipment, material and application
• the treated surface is seamless and jointless – the hydro-insulation is monolithic

Summarised technical data
Type bitumen knifing filler
Base bitumen, solvent, additives
Solvent testbenzin
Colour black
Density 1.20-1.30 g /cm³
Consistency pasty
Application using a spatula
Softening point of the solid body (EP) 170°C
Temperature stability 70°C, 2 hours, no running
Drawing quality at 4°C no cracks
Watertightness 0.5 bar, 8 hours watertight
Crack spanning 0.5 – 2.0 were unequivocally covered
Storage not sensitive to frost
Cleaning BORNIT® Bitumen Stain Cleaner
According to Industrial Safety Ordinance Flammable
VOC-content < 200 g/l

BORNIT® Roofing Mastic is a knifing filler based on highly elastic bitumen with top quality organic additives, which is ready for immediate use. It has very good hydro-insulating properties, even against pressure water as per AIB DS 835.

Base preparation
In order to ensure better gripping properties on concrete, masonry and plaster, BORNIT® Bitumen Bonding Primer is used as a primer coating.

BORNIT® Roofing Mastic is applied cold at temperatures above +10°C, but it can also be used at temperatures as low as-5°C. BORNIT® Roofing Mastic is malleable during application and it is applied using either a trowel or a filling knife (spatula). The thickness of the layer may be up to 5 mm.

About 1.25 kg/ m² for a layer thickness of 1 mm
About 12 m from one cartouche in the case of joint dimensions of 5 x 5 mm

The storage period is at least 12 months in the original, closed containers. It is not sensitive to frost.

Health protection during work and fire protection
Keep out of the reach of children. Do not eat, drink or smoke while working. When working ensure that there is sufficient ventilation! Pay Attention to the actual version of TRGS. Only in liquid state flammable and dangerous to the environment. Keep away from fire. After evaporation of the solvent, there is no more danger for the environment. The bitumen-film is not hazardous for human, as well as the environment.

Waste disposal
Only empty containers may be disposed of. Product waste is disposed of according to guideline no. 080409* (glues and insulation materials, which contain organic solvents or other dangerous products).

Method of delivery
310 ml cartouche      20 cartouches in a carton
    72 cartons on a pallet



Necessary information – particularly for the use and the use of our products – please refer our brochures. We are at your personal disposal.