Pre-com­pressed joint seal­ing tape for ex­ter­i­or use that is open to dif­fu­sion and res­ist­ant to driv­ing rain



  • Par­tic­u­larly weath­er-res­ist­ant
  • BG1 qual­ity
  • Res­ist­ant to driv­ing rain and open to dif­fu­sion
  • RAL qual­ity-tested in­stall­a­tion
  • Large range for all stand­ard joint widths


The CON­TEGA FID­EN EXO pre-com­pressed joint seal­ing tape for ex­ter­i­or use can be used to cre­ate joints on build­ing struc­tures in a man­ner that is open to dif­fu­sion and res­ist­ant to driv­ing rain.
This par­tic­u­larly weath­er-res­ist­ant tape has a self-ad­hes­ive sur­face on one side for easy in­stall­a­tion.

Material open-cell polyurethane flexible foam with polymer impregnation
Attribute Value Norm
Colour anthracite
sd-value < 0.5 m
g-value < 2.5 MN⋅s/g
Vapor permeance > 6.56 US perms ASTM E 96
Reaction to fire B1, P-NDS04-1001 DIN 4102
Joint permeability a < 0.1 m³/[(h⋅m⋅(daPa)n] EN 1026
Loading group BG1 DIN 18542
Resistance to driving rain requirements fulfilled up to 600 Pa EN 1027
Weather resistance passed DIN 18542
Can be plastered/painted over yes
Compatibility with conventional construction materials yes DIN 18542
Application temperature above +1 °C ; 34 °F
Temperature resistance permanent: -30 °C to +90 °C ; -22 °F to 194 °F
Storage 1 °C to 20 °C ; 34 °F to 68 °F, 12 months, cool and dry

Clean any loose dust and dirt from the joint. The ma­sonry may need to be lev­elled with a smooth fin­ish (e.g. mor­tar joints). Clean the sides of the win­dow frames.
Bond­ing to frozen sur­faces is not pos­sible. The sub­strate ma­ter­i­al must be free of wa­ter-re­pel­lent sub­stances (e.g. grease or sil­ic­one). Sub­sur­faces must be suf­fi­ciently dry and have suf­fi­cient load-bear­ing ca­pa­city.

Per­man­ent ad­he­sion is achieved on planed and painted wood, hard plastics, hard wood-based pan­els (chip­board, OSB, ply­wood pan­els) and met­al.

The best res­ults in terms of struc­tur­al sta­bil­ity are ob­tained on high-qual­ity sub­sur­faces.
It is your re­spons­ib­il­ity to check the suit­ab­il­ity of the sub­sur­face; ad­he­sion tests are re­com­men­ded in cer­tain cases.

The tape must be stored in a cool place on the building site when temperatures are above 20 °C. When temperatures are below 8 °C, the tape should ideally be kept above this temperature. Select the tape dimensions and planning of the joint dimension according to the RAL guideline for planning and carrying out the installation of windows and doors.

Allow 1 cm of additional length of the tape for every metre length of the joint (compressed installation). Use butt-joints at corners and longitudinal joints. Ensure the tape remains in place until decompressed by using the self-adhesive surface on a suitable subsurface. Fit the tape with an offset of at least 2 mm inside the edge of the joint for engineering reasons.

To avoid decompression of already-started rolls: fix the ends of the tape with a staple or else wrap an adhesive strip fully around the tape. Store the rolls lying flat. Place a weight on the side of already-started rolls.

Check compatibility before plastering or painting over the tape.

Do not bring the tape into contact with aggressive chemicals or clean it using aggressive chemicals.