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TP650 is an impregnated, pre-compressed multi-functional sealing tape. It is comprised of open-cell polyurethane soft foam, impregnated with flame-retardant synthetic resin. The different vapour diffusion properties are achieved through a unique, one-sided patented side impregnation. The impregnation also protects the tape against mould and fungi. TP650 utilises the property of water-vapour permeable sealing, making it less permeable inside than outside (inside tighter than outside principle).


TP650 is used for sealing the perimeter joints of windows and doors against driving rain and provides airtightness and thermal insulation, thereby maintaining the energy performance of the window/door. Easy application with single product, complying with BS8213-4:2016 Code of Practice & GGF Guide to Good Practice – Installation of replacement windows and doors.

  • Suitable for new-build and replacement installations
  • Maintains the energy performance of the window/door
  • Driving rain resistant to 600 Pa, also providing thermal and acoustic insulation and airtightness in one product
  • Quick and easy application
  • Complies with BS8213-4:2016 CoP for survey and installation of windows and external doorsets
  • Complies with GGF Guide to Good Practice – installation of replacement windows and doors
  • Vapour permeable

Technical data

Property Test Method Result 
Flammability Class DIN 4102 B2 (normally flammable) 
Thermal Conductivity DIN 52 612 ʎ10 = 0.048 W/m.K 
Overall Heat Transfer Coefficient U
Window frame thickness 60 mm
Window frame thickness 70 mm 
 0.8 W/(m² . K)
0.7 W/(m² . K) 
Coefficient of Diffusional Resistance EN 150 12 572μ < 100
Water Vapour Permeability Tighter inside due to impregnated surface
Joint Air Permeability EN 1026  a < 0.1 m3/[h.m.(daPa)n] 
Driving Rain Resistance EN 1027600 Pa
Compatibility with Traditional Building Materials DIN 18542 Guaranteed according to BG1. For substrates containing solvents or softeners, compatibility testing is required.
Thermal Resistance -30°C to +80°C 
Application Temperature  No restriction
Storage  Store in dry, shaded conditions between +1°C and +20°C. 
Shelf Life  12 months when stored in cool, dry conditions in original unopened containers. 
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