Operating Guide

CAUTION: There is potential that a hose is blocked and
the tank is not yet empty. If the cylinder feels heavy,
appears to be under too much pressure, or contains too
much material, close the valve. In this case, the cylinder
needs to be disposed of as a hazardous waste and
cannot be emptied using these procedures.
9. Absorb any remaining liquids collected in Step 8 with
dry oil absorbent material as in Step 4. Once mixed
thoroughly, it can be disposed of as ordinary industrial
waste.
10. If the waste container contains an excess amount of
“A” side versus “B” side, spray a small amount of water
over the waste material but not enough to have a
pool of liquid. Allow container and waste material
in the plastic bag to vent while protected from the
weather for 24-48 hours. After this time, tie the bag
loosely and dispose of the solid waste as ordinary
industrial waste. If waste contains more B side than
A side, then mix the material with a stick to ensure
all liquids are absorbed adding more absorbent as
necessary and dispose of as ordinary industrial waste.
11. EMPTY and VENTED cylinders can be disposed of
as scrap, recycle steel or ordinary industrial waste.
IMPORTANT
Empty and vented cylinders can be disposed of as
scrap, recycle steel or ordinary industrial waste.
• Plan project carefully to completely empty each
cylinder before starting a new one.
• When finished, spray foam into a cardboard box to
empty the cylinders.
• Empty cylinders may be recycled to reclaim
the steel.
• Cylinders containing polyol or isocyanate must be
disposed of as hazardous waste and cannot be
recycled or sent to a municipal landfill.
• Follow all local, state/provincial and federal
regulations when disposing of cylinders and
handling hazardous waste.
• Pieces of cured foam are considered inert and
can be disposed of as regular trash.
The below information is provided as a courtesy for customers
and DuPont believes that it is accurate. However, the customer
is ultimately responsible for determining whether the informa-
tion in this document is appropriate for customer’s use and for
ensuring that the customer’s workplace and disposal practices
are in compliance with applicable laws and other government
enactments. If you have any questions regarding applicable
disposal procedures, contact the appropriate government
official. DuPont assumes no obligation or poor foam quality,
refer to the Troubleshooting section, Section 10 of this manual.
Section 9
Application Notes
9.1 Yield Notes
Board foot yields are based on the free rise of the total weight
of the liquid materials in the tanks. Many factors affect the
yield in field applications.
9.1.1 Operator Technique
For best results, apply multiple layers of foam. When
spraying, apply one-quarter to one-half inch thickness
of uncured foam. This will produce a one to one-and-
one-half inch thickness of fully cured foam.
9.1.2 Application
Avoid spraying over rising foam.
9.1.3 Temperature
To ensure proper chemical mix, reaction, cure, and
optimum yields, chemicals should not be dispensed
if the chemical temperature is below 65°F (18°C).
Insufficient operating temperatures can cause
improper mix, extend cure time, and adversely affect
final physical properties and yields.
NOTE: When using polyurethane foam, estimate 10% more foam than is
required. This yield buffer is recommended so that you will not run out of
chemical on a job site.
12