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AeroMarine Products Jet Black Casting Resin 1 Quart Kit contains:
1 Pint Part A
1 Pint Part B
**Always wear a respirator or self-contained breathing apparatus when working with urethanes.**
Do NOT spray. Our urethanes are only for pouring applications.
AeroMarine Black Urethane Casting Resin is a thin, fast setting polymer
used for casting parts for many applications.It is a simple “one to one” mix ratio and cures very quickly (within 60 seconds at 70F). Our black casting resin contains no fillers, has
no odor, and cures to a deep black color. Our jet black casting resin is easily painted. AeroMarine Products also offers an off-white casting resin,
a crystal clear casting resin, as well as colorants for casting resin.
** PLEASE NOTE: AeroMarine Products jet black casting resin "goes off" very quickly (.ie. within 60 seconds of mixing part a and b together), so make absolutely certain your mold is ready before you mix and pour the black casting resin!**
Directions for use:
Mix equal parts by volume. To avoid excessive exotherm, mix small batches until you are familiar with using this material. Various fillers can be added for custom results. All urethanes are moisture sensitive, so fillers must be dry. Store in sealed, dry containers.
This item ships in 1 box.
RETURNS: 30 Day return policy, buyer pays return shipping.
or no odor
electrical and mechanical properties
Dielectric strength- useful for electronic potting
toys and toy soldiers
Mixed viscosity:100 cps
(Almost water thin)
life: 1 minute @70F
Hardness:75- 80 Shore D
Specific Volume28 cubic
inches per pound
practices when using urethane casting resin
mix less than about 3 ounces of product.When manufacturers design and test their
resins, they normally write the specifications for 100 gram batches, which is
about 3 ounces.
There are two bad things that
can happen when mixing a smaller batch.Because the sample is small, it is much more difficult to get the mix
ratio correct. Also, these mixtures are exothermic, meaning that they generate
heat in order to cure.A tiny batch does
not generate enough heat to cure the resin properly.
mixing with drill motors.Mixing with an electric drill can cause a few problems. They don’t get into every corner
of the mixing container.Also, if they
spin too fast they can generate friction in the resin causing it to exotherm
out of control resulting in premature curing.Powered mixing also can generate a lot of air bubbles.
you use a mold release, let it dry for a while.A spray can of mold release contains a lot of
solvents and propellants. These compounds need to evaporate off the surface so
they don’t cause bubbles.Check the dry
time of the mold release from the directions on the label.
vary the mix ratio.
Unlike some polyester resins, altering the mix ratio to vary the cure cycle
doesn’t work with urethanes.
Mix everything twice- Mix the two components together in a clean container, then
transfer the mixture to another clean container and mix them again.The theory is that the liquids clinging to
the sides and bottom of the containers don’t get mixed well.By transferring the mixture to another clean container, you are assured that everything is well mixed.Any unmixed material stays in the first
**When using fast, water-thin
casting resins you may only have time to mix it once, but since it is water
thin it will probably mix fine in one mix.**
in plastic containers.Paper cups and wooden mixing utensils/tools contain moisture which may
adversely affect the polyurethane.Avoid
waxed paper cups because the wax may melt and contaminate the resin.
to avoid air bubbles- Air bubbles in urethanes are almost
always caused by moisture.Do everything
possible to avoid moisture getting into the mix.This includes replacing the lids onto the
containers promptly after use as well as avoiding using the product during
rainy days or times of high humidity.Avoid pouring against an unsealed water based product such as plaster or
hydrocal. Seal plaster or
hydrocal with something such as Krylon Clear Acrylic. Also, we stock an aerosol nitrogen blanket called
“Extend-It” that can increase the shelf life of the urethane during storage.
mixing a large batch-The larger the batch, the more exotherm or
heat is generated in the cure cycle.If
you are casting a large part, consider mixing small batches to make the process
more manageable.Thickness of the pour
also affects the exotherm and cure speed.A very thin pour will take much longer to cure than a thick pour.
or stir well before use- The liquid components may settle in the
containers during storage.Therefore, it
is a good idea to shake or stir the components separately before mixing.Let it sit a few minutes to let any bubbles
rise to the surface after shaking the container.
Always make a test to determine the feasibility of your process.There are many unforeseen factors that can
affect the outcome of your project.Running a controlled test may be inconvenient, but it can make the
“Learning Curve” of processing these products much easier.
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