Pressure-Sensitive Flashing Disk-EPDM Roof System

Pressure-Sensitive Flashing Disk-EPDM Roof System

Reference #



Let Viking Products Group simplify your next EPDM installation with their Pressure-Sensitive Flashing Disk. Flashing Disk consist of 40-mil (1.0 mm)-thick Plioseal Flashing with factory-applied Butyl Tape providing 70-mils (1.78 mm) of total thickness. Flashing Disks are used for patches at field splice intersections or at horizontal to vertical transitions of field splices on

Membrane Roofing Systems.
• Available in 8.5” Round disks
• Pre-Cut
• Increases installation speed
• Cleaner appearance

1. Remove dirt and excess dust from the splice area by wiping with a clean rag. If there is a heavy layer of dirt present, clean the splice area thoroughly with Weathered Membrane Cleaner. This process is essential on membrane that has been exposed for a number of weeks.
2. Application of Ashland Pliobond EPDM Primer:
a. Standard Membrane – Apply the primer using a clean wipe. SCRUB the area of the membrane where the Flashing Disk will be applied in a circular motion to achieve a thin, even coating on the membrane. Theproperly cleaned/primed area will be uniform in color without streaks and free of globs or puddles.
b. PRE-KLEENED Membrane – Roller apply the primer to the area of the membrane where the Flashing Disk will be applied with a short nap length paint roller. The coated area will be free of globs or puddles.
3. The entire surface where the Flashing Disk will beapplied must be cleaned and primed. The adhesive on the back of the Flashing Disk will not adhere to dusted/dirty surfaces. Any residual surface contamination will be detrimental to the bond strength of the adhesive.
4. Allow the Ashland Plioseal EPDM Primer to dry until it does not transfer to a dry finger touch.
5. Remove release liner from the Flashing Disk. Install Disk to primed membrane area immediately after primer flashes off to minimize potential dust contamination and promote adhesion in colder weather.
6. Immediately roll the Flashing Disk with a 2” (50mm) wide steel roller, using positive pressure.
7. Apply a 5/16” (8 mm) diameter bead of Sure-Seal Lap Sealant.
8. To achieve proper adhesion of the Flashing Disk when job site temperatures fall below 40°F (4°C), heat the cleaned/primed area of the membrane with a hot air gun as the flashing is applied and pressed into place.

1. Avoid prolonged contact with skin. In case of contact with skin, thoroughly wash affected area with soap and water.
2. Prolonged job site storage temperatures in excess of 90°F (32°C) may affect product shelf life.
3. In warm, sunny weather,  keep Flashing Disk in their box or in a shaded area until ready to use.
4. Storage and use of Flashing Disk at temperature below 40°F (4°C) will result in a loss of adhesive tack, and in extreme cases, will result in no bond to this substrate. Overnight storage must be available to keep the temperature of the Flashing Disk at a minimum of 60°F (15°C). Hot boxes for job site storage must be provided to maintain a minimum product temperature of 40°F (4°C).
5. Flashing Disk must be stored in a dry area.
6. Due to solvent flash-off, condensation may form on freshly applied primer when the ambient temperature is near the dew point. If condensation develops, the application of primer and Flashing Disk must be discontinued since proper adhesion will not be achieved. Allow the surface to dry and apply a thin freshener coat of primer to previously coated surface and apply Flashing Disk when   conditions allow.
7. Do not allow waste products (petroleum, grease, oil, solvents, vegetable or mineral oil, animal fats, etc.)or direct steam venting to come in contact with the Flashing Disk
This information contained herein is correct to the best of our knowledge. The recommendations or suggestions in this bulletin are made without guarantee or representation as to results. We suggest that you evaluate these recommendations and suggestions in your own laboratory prior to use. Our responsibility for claims arising from breach of warranty, negligence, or otherwise is limited to the purchase price of the material. Freedom to use any patent owned by Viking Products Group or others is not to be inferred from any statement contained herein.