MULTIPURPOSE FLASHING & REPAIR TAPE
KeeneFlash 300 is a clear butyl flashing tape designed for sealing building penetrations such as windows, doors, dryer vents, and utility pipes. Its aggressive butyl adhesive system creates a permanent seal to protect buildings from air and water infiltration. The flat film backing provides strength and durability against rips, tears, and punctures.
KeeneFlash’s unique design makes it the go-to flashing and repair tape on modern job sites. Whether used as a window & door wrap, roof deck tape, joint & transition tape, or roof repair tape, KeeneFlash covers a wide variety of building envelope needs. With outstanding performance, ease of handling, UV stability, and multiple widths available, KeeneFlash is the “Duck Tape®” for the building envelope.
FEATURES AND BENEFITS
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Highly conformable film backing: Flexible for bending around edges, corners, and transitions
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Wide installation temperature range: Suitable for all regions
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Self-healing after puncture: Maintains integrity even after damage
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Permanent weather-tight seal: Works on most clean, dry building surfaces
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Compatible butyl adhesive: Works with sealants and flexible/rigid PVC window flanges
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Easy-to-remove release liner: Moisture stable for simple installation
APPLICATIONS
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Window and door openings (headers, jambs, window flanges, sills, thresholds)
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Dryer vents and pipe penetrations
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Sealing joints and seams in exterior sheathing panels
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Foundation sill plates
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Deck to wall intersections
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Other non-roof detail areas
BASIC INSTALLATION
- Substrate must be dry.
- Substrate needs to be clean and free of dust and dirt.
- Damaged substrate should be repaired before installation.
- Apply in a shingling fashion when multiple courses are needed.
- Ensure all protruding fasteners are removed.
- Once installed use a hand roller to roll all installed KeeneFlash 300 to ensure proper adhesion.
SIZES AND PACKAGING
| Roll Width |
Roll Length |
Rolls Per Box |
| 4" |
75' |
12 |
| 6" |
75' |
8 |
| 9" |
75' |
4 |
RESOURCES
