Fentrim 430 Grey - 9"
Fentrim 430 Grey – 9″ is the complete window and door sill-flashing tape you’ve been waiting for.
With more adhesive and adhesion strength than the Wigluv tape, this tape will stick to most substrates and building materials; it will even stick to porous and rough substrates – like concrete and OSB – without the need for a primer. You can even apply Fentrim in cold weather conditions!
SIGA Fentrim 430 Grey – 9″ tape has a slight perm rating, making it breathable so as to prevent condensation buildup, rot and mold.
The grey, single-sided, high-performance acrylic adhesive tape is the optimal solution for permanent windtight and driving-rain proof sealing of window and door frames in solid construction on the outside*. The tape can also be used to seal between slab and base joint without the use of a primer. Is has a felt-like texture, making application easy on the hands; this feature also aids in creating a seamless air and water barrier when applied to itself or WRB’s like SIGA Majvest.
Fentrim 430 Grey comes available in various widths which you can find here: 4″ / 6″
For a pre-folded version of this tape, try Fentrim 230.
Width: 9″
Length: 82′
*This tape is not designed for use in permanently UV exposed applications.





This is a great product to seal brick lug areas
Pliable & easy to install.