Intex Rubber & Specialty
"Providing Sealing Solutions Since 1984"
Thermofit Ducting Sealant
(Thermofit Wrap around Duct Band)
TWDB is a hot applied duct sealing tape
composed of heat-shrinkable backing with a
heat resistant pressure sensitive, non-drip
adhesive and a closure patch.

Two-layer system:
First Layer: Copolymer Adhesive
Second Layer: Thick-walled,
radiation-cross-linked, high
density polythylene.

TWDB is installed using propane gas torches.
The ducts are assebled and raised into
position after installation. The tape is wrapped
around the ducts where joined, a closure is
then applied, allowing the tape to essentially
form a tube or band around the joint. When
heated in excess of 120
°C or 250 °F, the tape
shrinks tightly around the substrate of the joint
area. During recovery, the adhesive softens
and flows to form a tenacious bond with the
substrate and to fill the irregularities such as
the interlocking seams. The bond strength
builds up during cool down and is fully
retained after completion of the job.
Mechanically strong, pressure tight seals are
4" x 165 ft roll
Wrapped, heat-shrinkable tapes used for
corrosion protection of pipe bends and also
for small diameter straight pipes in
distribution networks.
Multi wrap construction.

Semi-crystalline mastic sealant.

Flexible, radiation cross-linked, low
density polythylene.

The installation is carried out directly on
the cleaned and prepared pipe surface
without any primer. The carrier is heated
and shrinks tightly around the substrate,
while, the sealing adhesive melts and is
forced into all surface irregularities, forming
a thorough coating and a complete bond
with the substrate.
3" x 50 ft roll
4" x 50 ft
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