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Polyurethane
RTV Mold Rubber
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The 74-30 is
the softest of our RTV rubbers. These rubbers can
be used for making
durable, easy releasing molds for casting gypsum
plasters, waxes, cement, epoxy resins
polyester resins along with urethane and acrylic.
Proper mold
release is
needed to
insure easy parting from the mold.
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74-30
RTV Liquid Urethane
Mold Rubber
Mixed
1 Part A to 1 Part B
Working Time: 30 Minutes
Demold Time: 24 Hours
Hardeness, Shore A: 30
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Info:
Our softest polyurethane. Fairly soft and
stretchable. Good for molds with complex
shapes or detail that might require an
easily flexible rubber.
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Mold
Release Info: For releasing this
rubber from a smooth non-porous
original/plug an aerosol such as
Poly-2300
or Stoner
is suitable. Porous objects such as
plaster, concrete or wood should first be
sealed to create a smooth surface from
which to apply the mold
release.
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74-30 Is Available in
2 Part Kits
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Cat
No.
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Description
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Price
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POLY-74301
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16oz
Kit (8oz A + 8oz B)
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$16.85
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POLY-74302
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32oz
Kit (2
LBs)
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$28.50
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POLY-74303
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2
Quart Kit (4
LBs)
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$49.00
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POLY-74304
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1
Gallon Kit (8
LBs)
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$83.50
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POLY-74305
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2
Gallon Kit (16
LBs)
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$140.50
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POLY-74306
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10
Gallon Kit (80
LBs)
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$524.00
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Kit sizes above show total volume included in
kit
with total weight in parentheses.
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75-60
RTV Liquid Urethane
Mold Rubber
Mixed
1 Part A to 1 Part B
Working Time: 15 Minutes
Demold Time: 12 Hours
Hardness, Shore A: 60
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Info:
A medium hardness polyurethane. Similar in
hardness to a pencil eraser. The cured
rubber will flex but has very little
stretchability.
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Mold
Release Info: For releasing this
rubber from a smooth non-porous
original/plug an aerosol such as
Poly-2300
or Stoner
is suitable. Porous objects such as
plaster, concrete or wood should first be
sealed to create a smooth surface from
which to apply the mold
release.
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75-60 Is Available in
2 Part Kits
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Cat
No.
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Description
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Price
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POLY-75601
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16oz
Kit (8oz A + 8oz B)
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$16.85
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POLY-75602
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32oz
Kit (2
LBs)
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$28.50
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POLY-75603
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2
Quart Kit (4
LBs)
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$49.00
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POLY-75604
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1
Gallon Kit (8
LBs)
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$83.50
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POLY-75605
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2
Gallon Kit (16
LBs)
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$140.50
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POLY-75606
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10
Gallon Kit (80
LBs)
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$524.00
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Kit sizes above show total volume included in
kit
with total weight in parentheses.
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75-80
RTV
Liquid Urethane Mold
Rubber
Mixed
2 Parts A to 1 Part B
Working Time: 45 Minutes
Demold Time: 24 Hours
Hardness, Shore A: 80
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Info:
A very hard polyurethane rubber. Very
close in hardness to a car tire. Best for
flat molds with minimal detail. Also can
be used for certain concrete stamping
applications.
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Mold
Release Info: For releasing this
rubber from a smooth non-porous
original/plug an aerosol such as
Poly-2300
or Stoner
is suitable. Porous objects such as
plaster, concrete or wood should first be
sealed to create a smooth surface from
which to apply the mold
release.
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75-80 Is Available in
2 Part Kits
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Cat
No.
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Description
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Price
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POLY-75801
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24oz
Kit (16oz A + 8oz B)
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$25.00
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POLY-75802
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48oz
Kit (3
LBs)
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$43.50
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POLY-75803
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3/4
Gallon Kit (6
LBs)
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$72.50
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POLY-75804
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1 1/2
Gallon Kit (12
LBs)
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$120.50
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POLY-75805
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3
Gallon Kit (24
LBs)
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$212.00
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POLY-75806
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15
Gallon Kit (120
LBs)
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$788.00
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Kit sizes above show total volume included in
kit
with total weight in parentheses.
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75-90
RTV
Liquid Urethane Mold
Rubber
Mixed
2 Parts A to 1 Part B
Working Time: 10 to 15 Minutes
Demold Time: 24 Hours
Hardness, Shore A: 90
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Info:
Polytek 75-90 is our hardest and strongest
polyurethane rubber. It is used for making
tough, durable molds, liners and stamps
for casting, forming and texturing
concrete. This firm rubber is also popular
for making industrial parts, rollers,
gaskets, bumbers, pads, and more.
If tinting this rubber is desired, we sell
a selection of tinting colors here:
COLORED PIGMENTS
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Mold
Release Info: For releasing this
rubber from a smooth non-porous
original/plug an aerosol such as
Poly-2300
or Stoner
is suitable. Porous objects such as
plaster, concrete or wood should first be
sealed to create a smooth surface from
which to apply the mold
release.
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75-90 Is Available in
2 Part Kits
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Cat
No.
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Description
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Price
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POLY-75901
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24oz
Kit (16oz A + 8oz B)
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$26.75
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POLY-75902
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48oz
Kit (3
LBs)
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$46.00
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POLY-75903
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3/4
Gallon Kit (6
LBs)
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$77.00
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POLY-75904
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1 1/2
Gallon Kit (12
LBs)
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$127.00
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POLY-75905
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3
Gallon Kit (24
LBs)
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$223.00
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POLY-75906
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15
Gallon Kit (120
LBs)
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$869.00
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Kit sizes above show total volume included in
kit
with total weight in parentheses.
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Polygel 35
Self Thickening RTV Liquid
Urethane Rubber For Brush-On Molds
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Polygel mold rubbers
consist of two liquids, Part A and Part B which after mixing
immediately gel to a brushable or trowellable consistency,
then cure overnight at room temperature to a flexible, tough
RTV rubber. They are ideal for molds built up with a brush,
spatula or spray, Polygel mold rubbers are recommended for
evaluation as a mold material for plaster, cement and waxes,
as well as for limited casting with polyester epoxy and
polyurethane resins.
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Poly
Gel 35
Mixed
1 Part A to 1 Part B
Hardness, Shore A: 35
Working Time: 8 to 10 Minutes
Demold Time: 24 Hours
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Info:
A self-thickening brushable mold
rubber. Used primarily for blanket molds.
Usually requires a mother mold backing to
support the mold after it is made. Plaster
or fiberglass and resin are commonly used
for mother molds.
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Available
in 2 Part Kits
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Cat
No.
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Description
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Price
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POLY-GEL351
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16oz
Kit (8oz A + 8oz B)
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$17.25
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POLY-GEL352
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32oz
Kit (2
LBs)
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$29.00
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POLY-GEL353
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2
Quart Kit (4
LBs)
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$49.50
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POLY-GEL354
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1
Gallon Kit (8
LBs)
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$84.50
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POLY-GEL355
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2
Gallon Kit (16
LBs)
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$146.50
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POLY-GEL356
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10
Gallon Kit (80
LBs)
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$598.00
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PlatSil 73 Series RTV Silicone Mold
Rubbers
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PlatSil rubbers are
platinum-cured(also known as addition-cure), room
temperature curing silicones(RTV) that are used to make
flexible, high-strength molds and parts. PlatSil molds are
often selected over other mold materials because of their
excellent release properties. They exhibit long mold life
and low shrinkage on cure.
PlatSil molds are excellent
for casting polyurethane, epoxy resins, polyester resins,
polyurethane foam, wax, plaster, soap, concrete, and more.
Release agent is generally not needed to cast any of these
materials. Should not be used with silicone based releases
or lubricants.
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73-25
Plat-Sil
RTV Silicone Mold
Rubber
Mixed
1 part B to 1 part A
Hardness, Shore A: 25
Pour Time: 15 min.
Demold Time: 6 Hours
Cured Color: Light Green
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*Special
Note: This Platinum Cure silicone
works extremely well for casting polyester
resins such as our Silmar 41. It will
leave much less tackiness on the surface
of the cured resin when removed from the
mold*
Info: Polytek PlatSil 73-25 is a very
easy to use 1:1 ratio. It is a very soft
and stretchable silicone rubber. No mold
release is required, however when making a
mold from a porous surface such as wood
the surface should be sealed or painted to
avoid possible sticking.
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Available
in 2 Part Kits
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Cat
No.
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Description
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Price
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POLY-7325-1
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2LB
Kit
(approx. 1 Quart)
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$
56.00
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POLY-7325-2
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4LB
Kit
(approx. 2 Quarts)
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$
92.00
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POLY-7325-8
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8LB
Kit
(approx. 1 Gallon)
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$
177.00
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POLY-7325-16
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16LB
Kit
(approx. 2 gallons)
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$
329.00
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POLY-7325-80
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80LB
Kit
(approx. 10 gallons)
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$
1,400.00
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*FOOD GRADE RATED*
(see
details
below)
73-45 Plat-Sil
RTV Silicone Mold
Rubber
Mixed
10 parts B to 1 part A
Hardness, Shore A: 45
Pour Time: 40 min.
Demold Time: 16 Hours
Cured Color: Green
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Info:
Polytek PlatSil 73-45 is a two-part,
platinum-cure liquid silicone system.
Mixed at a 10:1 ratio by weight. This
system has a medium grade of
hardness(Shore: A45) and
stretchability. No mold release is
required, however when making a mold from
a porous surface such as wood the surface
should be sealed or painted to avoid
possible sticking. See details below
regarding use as a mold in food
processing.
*Special Note: This Platinum
Cure silicone works extremely well for
casting polyester resins such as our
Silmar 41. It is also good for casting
plasters, polyurethane resins, acrylic
resins, and epoxy. Platinum cure silicone
will leave much less tackiness on the
surface of the cured polyester resin when
removed from the mold*
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*FOOD GRADE RATED*
(see
details below)
Available in 2 Part Kits
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Cat
No.
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Description
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Price
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POLY-P7345-1
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1LB
Kit
(approx. 0.8 Pint)
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$
39.90
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POLY-P7345-2
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2LB
Kit
(approx. 0.8 Quart)
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$
70.50
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POLY-P7345-9
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9LB
Kit
(approx. 0.8 gallons)
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$
161.00
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POLY-P7345-44
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44LB
Kit
(approx. 4 gallons)
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$
797.00
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•Food
Grade Rated
Silicone•
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Details:
•Plat-Sil 73-45 has been tested by an
independent laboratory and was found to
comply with 21 CFR 177.2600 (as
published in the Code of Federal
Regulations) for rubber articles
intended for repeated use food contact
surfaces when accurately measured,
thoroughly mixed, and fully cured.
Compliance with this regulation also
requires that the user of this material
must also comply with all applicable
FDA requirements.
•The 73-45 is commonly used to make
ice trays, baking molds/trays, chocolate
molds, butter molds, fondant molds,
gaskets and seals for food processing
environments, and other culinary and food
processing applications.
•Review product Technical
Bulletin
above for processing instructions.
•Prior to using silicone molds or
parts for food applications, thoroughly
wash the mold or part with a water and
dishwashing detergent, then rinse and
applow to dry. When applicable, thoroughly
wash the mold or part in between batches.
If baking, do not expose the mold to
temperatures above
400°F.
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TinSil 70 Series RTV Silicone Mold
Rubbers
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Consists of a liquid
Part B base and Part A accelerator which after mixing
at the proper ratio by weight, cure at room temperature to a
flexible high tear strength RTV silicone rubber. All TinSil
70 Series mold rubbers are tin-catalyzed, condensation-cure
systems. They are ideal for molds where easy release or high
temperature resistance is needed. They are recommended for
evaluation as mold materials for polyester, epoxy and
polyurethane resins and waxes. Mold release is not required
for casting parts in silicone molds. A mold release wax
may be needed when pouring the liquid silicone rubber onto a
porous substrate such as wood or plaster. Should not be used
with silicone based releases or lubricants.
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70-60
Tin-Sil
RTV Silicone Mold
Rubber
Mixed
20 parts B to 1 part A
Hardness, Shore A: 60
Pour Time: 30 min.
Demold Time: 24 Hours
Cured Color: Red
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This mold
rubber is well suited for casting
low-temperature melting metals such as
pewter. This rubber has a lower tear
strength compared to the 70-25 but can
withstand higher temperatures upto 400
degrees.
Info:
A more rigid silicone rubber similar to
the hardness of a pencil eraser. No mold
release is required, however when making a
mold from a porous surface such as wood
the surface should be sealed or painted to
avoid possible sticking.
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Available
in 2 Part Kits
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Cat
No.
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Description
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Price
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POLY-70601
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1LB
Kit
(approx. 1 Pint)
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$
36.00
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POLY-70602
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2LB
Kit
(approx. 1 Quart)
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$
59.50
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POLY-70603
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8.4LB
Kit
(approx. 1 Gallon)
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$
162.00
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POLY-70604
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42LB
Kit
(approx. 4-1/2 gallons)
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$
697.00
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