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TP652 is a flexible polyurethane foam impregnated with flame-retarding modified synthetic resin. It differs from standard impregnated foams due to the innovative illbruck composite step technology.


This multi-functional sealing tape is used to provide an airtight and driving rain-resistant seal to window and door joints while also having thermal-insulating properties across the entire depth of the perimeter gap. The newly developed inner step band and the greater interior compression from it meets demands in Passive Housing, new building and renovation. TP652 meets the requirement “tighter inside than out“ in relation to water vapour diffusion according to the RAL assembly guidelines.

  • Multi-functional and wide area of application    
  • 600 Pa, BG1 and BGR tested according to DIN 18542
  • Complies with the requirements of the RAL assembly guidelines
  • Wedge-shape for easy assembly

    Usage Guidelines

    • A tape measure, flat blade and scissors or knife are required for installation.
    • Ideally the tape should be stored and used at temperatures between 10 - 20°C. High temperatures accelerate the tape expansion process and low temperatures slow it down.
    • The window opening should be continuous, and free from debris which may protrude into the perimeter joint. 
    • Clean the sides of the window frame.


    TP652 is an open cell, flexible polyurethane foam impregnated with flame-retarding modified synthetic resin. It is solvent free and self adhesive for easy use. TP652 differs from standard impregnated foams due to the innovative illbruck composite step technology, indicated by the extra layer of grey foam towards the inner face. This results in multi-functional capability providing airtightness to Passive House levels, and in addition, a higher sd value, which means increased vapour tightness on the inside of the joint.
    As with all illbruck impregnated tapes, weather tightness is assured (600 Pa minimum) and the greater depth into the joint ensures the thermal performance of the window is maintained.


    Joint  FullyFullyInstallationInsulation Contents
    Depth* 1) WeathertightWeathertight*****Rolls/Box
    Tape Width (mm)SizeTape Thickness (mm)Tape Thickness (mm)Tape Thickness (mm)Tape Thickness (mm)/Box(m)
    58 #XS0404-804-0915436
    72 #XS04-704-804-0915327
    83 #XS04-704-804-0915327
    58 #S06-1006-1206-1422432
    72 #S06-1006-1206-1422324
    83 #S06-1006-1206-1422324
    58 #M8-158-1808-2133424
    72 #M8-158-1808-2133318
    83 #M8-158-1808-2133318
    58 #L10-2010-2410-2845420
    72 #L10-2010-2410-2845315
    83 #L10-2010-2410-2845315
    58 #XL15-3015-3615-4266412
    72 #XL15-3015-3615-426639
    83 #XL15-3015-3615-426639

    Technical data

    PropertyTest MethodResult
    Building ClassificationDIN 4102B1, low flammability
    Exposure class for Impregnated Foam TapesDIN 18542BG1 + BGR
    Thermal ConductivityDIN 52612λ = 0.048 W/(m.K)
    U-Value: Window construction depth 60mm 0.8 W/(m² · K)
    U-Value: Window construction depth 70mm 0.7 W/(m² · K)
    U-Value: Window construction depth 80mm 0.6 W/(m² · K)
    Water vapour diffusion, sd value externallyDIN EN ISO 12572< 0.5 m
    Water Vapour Gradient Inside tighter due to step band
    Joint PermiabilityDIN EN 1026α < 0.1 m³/[h ·m· (daPa)²/³]
    Resistant to Driving RainDIN EN 1027600 Pa
    Acoustic InsulationDIN EN ISO 717-168 db in 20mm joint in combination with SP525
    Compatibility with conventional materialsDIN 18 542Specified according to BG1, carry out a compatibility test in products with solvents or plasticisers
    Emissions TestAgBB/DIBTSuitable for interior spaces
    Service Temperature -30°C to +80°C
    Storage Store rolls horizintally and in original carton between =8°C and +20°C in dry conditions and away from direct sunlight. Re-Seal packaging between use to prevent expansion during storage
    Shelf Life 9 months when stored in its original unopened containers.
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