Firestone I.S.O. Twin Pack adhesive is a two-component low-rise
polyurethane adhesive designed for anchoring acceptable roof
insulation or cover boards to a building's structural deck, adhered
vapor retarders, smooth or properly prepared graveled bituminous
surfaces or to adhere multiple layers of acceptable insulation
- Wood fiber
- PUR/PIR insulation
- Mineral wool
- ISOGARD HD
- DensDeck Prime
- Structural concrete
- Plywood and OSB
- Modified bitumen membranes and base sheets
- Approved insulations
Key Features and Benefits
Mechanical fastening of insulation
or cover boards can be difficult and labor intensive in case of a
concrete deck. Puncturing the vapor barrier is often not allowed in
case of buildings with high interior humidity levels. Mechanical
fastening of the insulation boards reduces the total R-value of the
total roofing system because of cold bridging.
Using a PU adhesive eliminates the need for mechanical
fasteners, eliminates cold bridging and thus allows, in some cases,
to reduce the insulation thickness by 10 to 15% for the same
R-value of the total roofing system.
The Firestone I.S.O. Twin Pack contains no solvents and sets in
minutes. Application is quick and easy resulting in significant
labor savings for the contractor. The adhesive can be applied using
the handtool 'Twin Pack Hand Dispenser' or the semi-automatic 'Twin
Pack Four Bead dispenser' for quicker installation.
Each I.S.O. Twin Pack kit dispenses the mixed adhesive in a 12
mm wide bead. This bead will rise to 20-25 mm. Boards need to set
in the adhesive before a skin coat develops. Set-up time varies
between 5 and 15 minutes.
- Beads are installed 300 mm on center: 56 m² per carton
- Beads are installed 150 mm on center: 28 m² per carton
- Beads are installed 100 mm on center: 19 m² per carton
Bead spacing depends on the local wind uplift regulations and
the type of board and substrate.
Please contact the Firestone Technical Department for further
information on how to apply Firestone I.S.O. Twin Pack.
Twin Pack Insulation Adhesive Technical Information Sheet
I.S.O. Twin Pack Insulation Adhesive Part A Safety
Data Sheet (SDS)
I.S.O. Twin Pack Insulation Adhesive Part B Safety
Data Sheet (SDS)