Note: Always - Wear safety glasses and gloves. Use with
adequate ventilation. Read Material Safety Data sheet.
9900 -2.0 Hand - Mix Polyurethane foam should be mixed 100 to 80 by
weight. (Consult specification sheet). Use a scale to measure A and B
weight before mixing. (Determine amount required)
To Determine Volume: Free rise foam weighs approximately 2
pounds per cubic foot. Determine cavity volume and multiply times
foam in - place density. (Example: 1.5 cu, ft. X 2.5# Density = 3.75#
of foam. Mix 2.1# of "A" with 1.7# of "B" per instructions. Urethane
foam requires a pack factor to fill enclosed cavities. 2.5# density
was used in the calculation.
TO MAKE FOAM
Prepare a small can of cleaner for rinsing mixer.
Pour predetermined weights of A and B chemicals in separate
containers.
75 - 85 degrees F. is optimum. When ready to mix, pour one
chemical into the other and mix with propeller type mixer. Clean
mixer mineral spirits or acetone.
Pour mixture into mold or cavity and let expand.
If molding, demold in 12 to 15 minutes.
Notes: IF a molded part is required - apply wax or apply barrier
coat to mold. Allow wax or barrier coat to dry. Clamp mold before
foaming. Be careful Expanding foam will develop pressure when
molding.
ITEMS Required
Mixing containers. (16 or 32 oz paper
cups)
Propeller type mixer and drill motor.
(Paint mixer is ok)
Hand Mixing