£19.43 (inc. VAT £23.32)
Stretchable butyl rubber tape for internal or external sealing of PAVATEX-boards and membranes at penetrations and complicated junctions. PAVABASE or PAVAPRIM primer is required when applying on to wood fibre boards and other porous or mineral surfaces.
• High resistance to ageing
• Highly flexible and supple
• Universally shapeable
• Can absorb the movement of the components
22 in stock (Available for Backorder)
Highly flexible butyl rubber tape, for long-lasting, easy sealing of PAVATEX boards and membranes, indoors and outdoors, at penetrations such as rafters, purlins, vent pipes etc. When gluing to woodfibre boards or other porous or mineral surfaces, the primer PAVAPRIM is preliminary applied..
Material – Butyl rubber tape with stretchable foil carrier
Thickness (mm) – 2
Minimum installation temperature for base and air [℃] +5, Only with PAVAPRIM [℃] -10
Installation Temperature Tape [℃] +5 to +40
Temperature Resistance [℃] -40 to +90
Mass/box 10.8 kg
Roll length 5m
Roll width 80mm
Box contents 8 units
Frequently Asked Questions (FAQs) About PAVATAPE FLEX
What is PAVATAPE FLEX and what is it used for?
PAVATAPE FLEX is a highly flexible single-sided butyl rubber sealing tape with a stretchable foil carrier. It is used to create airtight and weather-resistant seals at penetrations, junctions and connections in PAVATEX timber insulation boards and membranes, both indoors and outdoors. It is especially suited for sealing around rafters, purlins, vent pipes and other complicated details.
What are the key physical characteristics of PAVATAPE FLEX?
• Material: Butyl rubber tape with a stretchable foil carrier.
• Thickness: Approximately 2 mm.
• Roll width: 80 mm.
• Roll length: 5 m per roll.
• Box contents: 8 rolls – available as single rolls from Unity Lime
• Temperature resistance: -40 °C to +90 °C.
At what temperatures can PAVATAPE FLEX be applied?
• Minimum substrate and ambient temperature: +5 °C (or as low as -10 °C when using a primer such as PAVAPRIM).
• Installation temperature range: +5 °C to +40 °C.
Do I need to use a primer before installing it?
Yes. When applying PAVATAPE FLEX to porous or mineral surfaces like wood fibre boards or plaster, it is recommended to apply a Pavaprim primer first to improve adhesion and ensure a long-lasting bond.
Where should PAVATAPE FLEX be used in a build?
PAVATAPE FLEX is best used:
• Around roof penetrations (vent pipes, rafters, purlins).
• At junctions and detailing points where boards and membranes meet.
• In both roof and wall airtightness detailing where flexibility and shape-ability are important.
What are the advantages of using PAVATAPE FLEX?
• Highly flexible and universally shapeable – ideal for awkward or uneven surfaces.
• Absorbs movement of building components without peeling.
• Easy, durable sealing that resists ageing and weathering.
• Works effectively indoors and outdoors when used as recommended.
How should PAVATAPE FLEX be installed?
• Prepare the substrate: Ensure surfaces are clean, dry and free of dust.
• Apply primer where necessary (e.g. PAVAPRIM on wood fibre boards).
• Unroll the tape, remove the backing paper and position it over the joint or penetration.
• Press on evenly by hand and avoid over-stretching to prevent shrink back.
• Use a pressure roller to ensure full contact with the surface.
• Install shortly after laying boards or membranes, and normally before fixing counter-battens.
Can PAVATAPE FLEX be exposed to weather after installation?
Yes. When installed correctly as part of a complete airtightness and weather resistance strategy, PAVATAPE FLEX can be used in external locations around roof assemblies and wall junctions. As with all weather-exposed tape applications, proper detailing and primer use is important for durability.
How should I store PAVATAPE FLEX?
Store PAVATAPE FLEX in a cool, dry place, protected from direct sunlight and humidity until it is ready to be used.
