MB-BT-P3Series: Bitüra

Bitüra P3 Glass-Fleece Membrane

3 mm bitumen membrane on glass fleece; an economical base layer and vapour control layer in two-layer systems.

Coverage: 1,12 m²/m² (bindirme dahil)
Packaging: 10 m² roll (1 × 10 m)
Application: +5 °C / +35 °C

Data sheet (TDS)Safety sheet (SDS)Calculate quantity

PDF documents are samples with a "DEMO" watermark.

Technical data

Coverage	1,12 m²/m² (bindirme dahil)
Curing	Second layer can follow once cool
Application temperature	+5 °C / +35 °C
Packaging	10 m² roll (1 × 10 m)
Colour	Black
Shelf life	12 months
Thickness	3 mm
Carrier	Cam tülü 60 g/m²
Cold flexibility	−5 °C

About the product

Bitüra P3 is a torch-applied bitumen membrane on a dimensionally stable glass fleece. It does not shrink with heat, giving a flat base as the first layer of two-layer systems.

As the glass carrier has limited elongation, it is not used alone on moving substrates but combined with polyester-reinforced Bitüra P4. It is also used as a vapour control layer under insulation boards on warm roofs.

Areas of use

Base layer of two-layer systems
Vapour control on warm roofs
On blinding concrete below foundations

Application steps

Sweep the deck, remove loose material and sharp edges; screed moisture must be below 4%.
Apply Astarix bitumen primer at about 0.3 kg/m² and let it dry completely.
Form fillets at upstands; pre-treat drains and penetrations with reinforcement pieces.
Torch-apply the rolls with 10 cm side laps and 15 cm end laps.
Check a 5–10 mm bitumen bleed at laps; lay the second layer offset by half a roll.
Turn the membrane at least 20 cm up the parapet and fix it with a termination bar and sealant.