safe + impervious





DURABIT SM can be installed quickly and economically, on all types of underlying structures.
DURABIT SM is very functional and it provides and extremely beneficial cost/ performance relationship.

Environmentally friendly

DURABIT SM – plastic roofing membranes are extremely immune to ageing as well as being rot resistant. This quality building material is environmentally sound in manufacture and use. It is plasticizer and chlorine free and it is completely harmless to health, water, earth and plants.


Oriented to the future

DURABIT SM is manufactured using a sophisticated and high quality process. It complies with, or exceeds, the relevant test standards. It can be anticipated that it will provide decades of service, when used in the proposed applications.


In excess of 400%. It can absorb movement and also bridge across structural joints.

High tensile strength

Even under bending stresses. Having a thickness of 2 mm DURABIT SM protection, whatever structural loads are encountered. this robustness is especially necessary in the case of roofs where the roofing material must be mechanically fixed.

Thermal resistance

DURABIT SM has a high thermal softening point. This makes it very suitable for use in hot climates. On the other hand it performs equally well at temperatures as low as -30°C.
Fire resistance: according to DIN 4102.

Bitumen resistence

The material can be installed directly onto a bituminous base, or onto any other base, without the need for a separation layer.
A reliable method for the renovation of bitumen roofs.

Root resistant

DURABIT SM is absolutely suitable for use on roofs with a grassed topsoil cover and on underground garages. It simultaneously fulfils the requirements of both roof sealing and roof penetration protection. FLL – test report.

Off cuts /waste

There are vitually none, as all remnants can be used up easily.


Loose laid – secured with a cover layer

In this application the DURABIT SM roofing membrane is loose laid, either by rolling out or as prefabricated units. This can be done directly onto a flat roof deck, or onto an insulation material which has specific resistance to compressive stress. Once installed the entire area of membrane must be secured, to the required standards, against the forces of wind up-lift. This can be achieved with a layer of rounded gravel or with concrete slabs.

Loose laid – secured by mechanically fixing

The mechanical fixing of DURABIT SM roofing membranes must be done in such away so as to ensure that they are securely and permanently attached to the roof. The fixing elements must have surface properties that enable them to secure the roofing membranes permanently, without causing damage.

Bonding with hot bitumen

DURABIT SMB – roofing membranes include a synthetic felt, sandwiched between two layers of DURABIT SM. The underside of the membrane is coated with a further layer of synthetic felt. This composite material can be fully bonded with hot bitumen to all, or any part, of the roof surface area.

DURABIT SM in vegetated roofs

Flat, or shallow pitched roofs of garages and industrial buildings are also suitable for vegetating. DURABIT SM is resistant to roots, micro-organisms and acid soil.

Seam welding

Trouble free hot-air welding using automatic and hand welding equipment results in homogeneously welded seams, without the need for any special bonding agents. As the nonwoven fibre glass mat is an integral layer within the membrane no additional work is required when transverse joints are to be welded, or when off-cuts need to be used up. DURABIT SM, a material for modern roof structures, with a safe and reliable jointing technology.

Extensive vegetating

In this instance low maintenance vegetation can be used which only requires a thin sub-stratum. The benefit is a reduction in weight, and so reduced construction and maintenance costs. Extensively vegetated roofs are mainly for ecological, or aesthetic purposes and they are not intended for use, e.g., for walking on.

Intensive vegetating

It is important to note that in an intensively vegetated roof there is additional static loading and care and maintenance. However, the more intensively a roof is vegetated, the wider the range of different uses to which it may be put.


Test results of properties of DURABIT SM, made by an officially authorised test institute.

Properties Units In accordance with
ÖNORM B 3672
DIN 16729 Results
Quality ÖN 3672/5.1 free form bubbles and cracks Requirements fulfilled
Thickness acc.
DIN 53370 mm 2,0 ± 5 % x = 2,01; s = 0,04
min: 1,95; max: 2,10
Strain under tensile stress
DIN 53 455-3-VI % ≤400 I: x = 593; s = 16
t: x = 668; s = 13
Tensile strength
DIN 53 455-3-VI N/mm_ none I: x = 8,7; s = 0,3
t: x = 6,0; s = 0,1
Dimensional variation
DIN 53 377 (80° C/6 h) % ≤ 1 I: x = – 0,07; s = 0,05
t: x = – 0,07; s = 0,05
Low temperature bending
DIN 53 361 no cracks
at – 20°C Requirements fulfilled
Mechanical puncture resistance SIA 20/15 mm undamaged by a drop height of 300 mm undamaged by a drop height of 400 mm

I = longitudinal direction; t = transverse direction



For flat roofs, roof gardens, terraces, underground garages, etc.
Thickness: 2 mm
Width: 1010 mm, 1400 mm
Length: 20 m
Middle layer: nonwoven glass mat


With a synthetic nonwoven fabric underlayer for rolling onto bitumen (for bonding to bitumen)
Thickness: 2 mm
Width: 1400 mm
Length: 20 m
Middle layer: nonwoven glass mat

According to DIN 16 729, Ö- NORM B 3668 and B 3672


DURABITBAUPLAST has specialised since 1975 in the manufacture of ethylene-copolymer (ECB) sealing membranes, which comply with the relevant standards. These are marketed under the registered trade name DURABIT.

DURABITBAUPLAST is active almost world – wide and has specialised distributors and installers in many countries.

In 1990 DURABIT won the State of Austria Award for Quality and Environmental Protection, for its fully perfected manufacture of roofing and sealing membranes.

DURABIT products are maintained at a constantly high quality by stringent third party and in-house quality control and quality assurance programmes. Having been awarded the Austrian Seal of Quality is further proof of the company´s high product proficiency.