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What do a yacht hull, a wind turbine blade and a lightweight bicycle frame have in common? All can be made from composites formed beneath an airtight film, with the air drawn out from underneath. This is vacuum bagging. The pressure difference presses the layers of material against a mould,
Butyl rubber is best known for its very low permeability to water vapour and gases. This makes it the basis of the primary barrier in applications such as insulating glass units, roofing tapes and automotive seals. Yet the polymer itself is only one part of the formulation. Whether a sealant
A lower price per kilogram of butyl compound does not necessarily mean a lower tape production cost. At the same width and thickness, material consumption also depends on density. Once losses, actual dimensions and line operation are taken into account, the ranking of quotations may differ from a comparison of
ALMARA, a Polish manufacturer of specialized butyl compounds, will exhibit at BAU 2027 in Munich, taking place from 11 to 15 January 2027. We invite construction material manufacturers, industrial partners and distributors to visit us in Hall B6, Stand 134. As one of the world's leading trade fairs for architecture,
Plasticizer migration is a problem whose importance can easily be underestimated when designing butyl tapes and sealing cords. Immediately after production, a compound may meet every quality-control requirement, exhibiting the required plasticity, surface tack, penetration and adhesion. Undesirable changes may only become apparent after weeks or months in storage, or
Moisture protection, long-term sealing performance and manufacturing consistency are critical considerations in photovoltaic module design. For selected PV constructions, butyl tape or polyisobutylene (PIB) sealing materials can provide an effective moisture-barrier or compressed sealing layer. However, specifying a butyl tape for photovoltaic production requires more than selecting a material based
How to Select a Release Liner for Butyl Tape A release liner protects the adhesive surface of butyl tape during production, storage and transport. It should then peel away easily and predictably during application. Its role, however, extends well beyond that of a disposable separator. The liner affects lamination, rewinding,
The Role of Barite in Sealants Barite is a filler with a density of 4.5 g/cm³ — almost twice as high as the raw materials typically used for this purpose. It is added to butyl sealant formulations specifically to increase the weight of the finished product. In this article, we
Which sealant has the lowest carbon footprint? For companies selecting sealing, waterproofing or joint-protection materials, carbon footprint is becoming an increasingly important procurement criterion. However, comparing butyl, silicone and bitumen sealants solely by their reported kg CO₂e values can lead to misleading conclusions. There is no universal carbon-footprint ranking that
Vacuum Bag Sealant Tape in Wind Turbine Blade Manufacturing Vacuum bag sealant tape is a relatively small component of the composite manufacturing system, but it plays an important role in producing wind turbine blades. Its primary function is to create a temporary vacuum-tight boundary between the vacuum bag film and
