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- HydroSpan™ works like a 3 dimensional copy machine enlarging
any shape or design in perfect proportion and detail. You can
increase the size of patterns, molds, art castings, foundry
molds, fossil patterns or original art works without sculpting
new masters.
- Original art can now be replicated in various sizes to customer
requirements. HydroSpan™ provides you with the ability
to easily and accurately increases the size of any object. No
sculpting is required, simply cast a part and soak in ordinary
tap water. If you are a sculptor or pattern maker imagine the
possibilities. Imagine how much time you will save. Click here for Tech Sheet.
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Order # |
Package Size |
Price |
Buy me |
3196103 |
3 quarts |
$69.99 |
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3196203 |
3 gallons |
$199.99 |
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We strongly recommend the use of Dry Gas Blanket when storing unmixed HydroSpan. |
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Photo depicts 3 successive expansions with the HydroSpan™
product; each head is 60% larger than previous casting. The
largest head (transparent green color) is the actual HydroSpan™
product after soaking in water and reaching full expansion. |
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- HydroSpan™ was created for artists wanting a fast economical
way to enlarge seashells, fossils and other common items for
a museum exhibit. Sculpting larger versions of common objects
is tedious and time consuming. Very detailed fossil reproductions
are virtually impossible to accurately sculpt. With HydroSpan™
you can simply make silicone molds from small objects and directly
enlarge them. When parts cast from HydroSpan™ are soaked
in water they accurately increase in size 60%. By making larger
silicone molds from the expanded HydroSpan™, you can produce
a series of progressively larger molds. The result is exponential
growth of your original shape. Using this expansion technique
we have expanded a silver dollar to the size of a dinner plate
in a series of three HydroSpan™ expansions.
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| How does it work? HydroSpan™
uses water to create a perfect expansion. Our invention is
a flexible urethane polymer, which over time absorbs individual
molecules of water deep into itself until it is completely
saturated. When liquid water touches the surface of HydroSpan™
, it is attracted to the atomic charge of the polymer molecules.
Polymer molecules deep within the HydroSpan™ will pull
water away from adjacent molecules closer to the surface and
in this way conduct water throughout. As water is absorbed
the polymer matrix stretches to accommodate the in coming
water. The water is so tightly held in the polymer matrix
it appears dry to the touch. Even cutting or crushing the
polymer will not easily release liquid water. Migrating water
molecules uniformly surround each polymer molecule, evenly
stretching the polymer matrix in all directions. Through this
process HydroSpan™ produces near perfect expansion of
molded shapes by soaking in ordinary tap water. |
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| HydroSpan™ is a safe easy to use 2 component flexible
urethane. It is non hazardous for shipping purposes and produces
no odor. It has a mix ratio of 2 parts A to 1 part B component
by volume, working life is 10-minutes, full cure time 24 hours.
Hardness of cured HydroSpan™ (before soaking) is 45
Shore A / hardness of expanded HydroSpan™ (after water
soaking for 14 days @ 72° F ) is 35 Shore A. Percent increase
in size 60%. HydroSpan™ is packaged in quantities of
1.5 and 7.5 gallons. To calculate size of expanded shape multiply
starting dimensions by a factor of 1.6. For example an object,
which measures 10 inches tall, will become 16 inches tall
after one expansion (10 X 1.6 = 16) |
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- Mix ratio: 100 parts A to 50 parts B component measured by
weight, 100 parts A component To 54 parts B component measured
by volume.
- Mixing method: Hand stirring or electric drill with jiffy
mixer attachment.
- Color: Transparent blue.
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