DOBAU®-Dampfsperrbahn BLR

Name: DOBAU®-Dampfsperrbahn BLR
Brand: DOBAU
SKU: dobau-dampfsperrbahn-blr

Cold self-adhesive, fire load-reduced bitumen vapour barrier membrane according to DIN EN 13970/ DIN 18234

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Description

Cold self-adhesive, fire load-reduced bitumen vapor barrier membrane in accordance with DIN EN 13970/DIN 18234, specially designed for flat roofs.

Technical standards: DIN EN 13970, DIN 18234

Advantages

Reduced fire load
Very thin
Easy to process
Cold self-adhesive
Good processability at low temperatures
Solvent-free
Solid
Vapor-tight (sd value > 1.500 m)

Available packaging

1 roll = 1.08 m × 50 m = 54 m², thickness: 0.25 mm (± 0.05 mm)

Downloads

Technical datasheet

Download PDF file

Technical info

Application instructions

Application

DOBAU®-Dampfsperrbahn BLR is laid straight rolling by removing the protective film. For safe overlapping, 8 cm must be maintained in the longitudinal and transverse seams. The glued areas can be additionally sealed. DOBAU®-Dampfsperrbahn BLR must be adhered to the substrate over the entire surface. In the cold season no welding is necessary as DOBAU®-Dampfsperrbahn BLR is highly adhesive. If the substrate is dry and free from impurities, no primer is required. However, priming with DOBAU®-Primer is always recommended if the substrate does not have optimum conditions. No primer is required for clean and dry plastic-coated, painted or unpainted trapezoidal steel profiles. Longitudinal seam overlaps must be glued over the entire surface by pressing down with body weight or a pressure roller. Especially at cross seams, ensure the underlying web is tightly stretched to avoid sagging — pressing overlaps with a rubber slider is not sufficient. The insulation can be applied mechanically or by bonding with a polyurethane liquid adhesive. DOBAU®-Dampfsperrbahn BLR can be used as a flexible sheet for emergency waterproofing for approx. 6 weeks; roof drainage must be sufficient. The tread resistance is maintained. The vapor barrier membrane does not replace a regular waterproofing.

Material consumption

1.08 m per m² with 8 cm overlap

Storage

Min. 12 months shelf life if unopened in the original carton. Protect from direct sunlight, keep cool and dry. To ensure optimum adhesion even in the cold season, store rolls in a frost-protected room and remove only shortly before use.

Technical data

Fire behaviour	Class E (DIN EN 13501-1)
Heating value	< 10,500 kJ/m² (DIN 51900-1)
Maximum tensile force lengthways/crossways	> 200 N/50 mm (DIN 12317-1)
Expansion lengthways/crossways	> 20 %
Cold bending behaviour	≤ -20 °C (DIN EN 1109)
Heat resistance	≥ 100 °C (DIN EN 1110)
Application temperature	-5 °C to +30 °C
Substrate temperature	+5 °C to +25 °C
Watertightness	passed (DIN EN 1928)
Water vapour permeability	sd > 1500 m (DIN EN 1931)
Thickness	0.25 mm (± 0.05 mm)
Width	1.08 m
Length (standard)	50 m