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Casting Product Index & Mold Making Compound Index & Mold Making or Casting Accessories

Pourable Semi-Rigid Polyurethane Casting Compounds

Polyurethane semi-rigid casting compounds are extremely easy to handle, because they have simple mix-ratios and good fluidity. They can be poured into practically any type of mold material with the right release agent (excluding Polysulfides). Certain sensitivities effect them negatively--short shelf life in pre-mixed form and a particularly strong aversion to water. They are available with variable set-up times and can be pigmented for custom work. The listings below are in order of increasing Shore D hardness when cured.

Smooth Cast 1509
C-1509 urethane casting resin is a semi-regid plastic (has some flexibilty) that is strong and tough. Originally developed for high impact tooling, C-1509 also offers good abrasion and chemical resistance.
Shore D
Color
Mix Ratio
Pot Life
Cure Time
Viscosity
Made by:
60
Milky Amber
1 : 1 by wt.
30 min
16 hrs
2000 cps
Order #
Size
Weight
Price
Buy me
66C1509
Pint kit - Smooth Cast 1509
(contains: 1 pt. part A, 1 pt. part B)
2lbs.
$24.99
66C1509A
Gallon kit - Smooth Cast 1509
(contains: 1 gal. part A, 1 gal. part B)
16lbs.
$151.99
66C1509B
5 Gallon kit - Smooth Cast 1509
(contains: 5 gal. part A, 5 gal. part B)
80lbs.
$608.99

Smooth Cast 1515
Semi-Rigid Like the 1509, 1515 is semi-rigid and very tough. It’s most unique feature is the fast cure/demold time. It is also flexible enough to be used as a fast-setting mold material. In addition, the cured castings exhibit good heat and chemical resistance.
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Viscosity
Made by:
95
Black
1 : 1 by vol
3 min
20 min
800 cps
Order #
Size
Weight
Price
Buy me
66C1515A
Pint kit - Smooth Cast 1515
(contains: 1 pt. part A, 1 pt. part B)
2lbs.
$24.99
66C1515B
Gallon kit - Smooth Cast 1515
(contains: 1 gal. part A, 1 gal. part B)
16lbs.
$164.99
66C1515C
5 Gallon kit - Smooth Cast 1515
(contains: 5 gal. part A, 5 gal. part B)
80lbs.
$666.99

Smooth Cast 1520
Semi-Rigid like the 1515, 1520 is semi-rigid and very tough. It’s only difference is the working/setting time.
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Viscosity
Made by:
95
Black
1 : 1 by vol
10 min
45 min
800 cps
Order #
Size
Weight
Price
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66C1520A
Pint kit - Smooth Cast 1520
(contains: 1 pt. part A, 1 pt. part B)
2lbs.
$24.99
66C1520B
Gallon kit - Smooth Cast 1520
(contains: 1 gal. part A, 1 gal. part B)
16lbs.
$164.99
66C1520C
5 Gallon kit - Smooth Cast 1520
(contains: 5 gal. part A, 5 gal. part B)
80lbs.
$666.99

Smooth Cast 45D
Smooth-Cast™ 45D & 60D are new low viscosity semi-rigid urethane plastics that are mixed 1A:1B by volume (no scale required), have a pot life of about 3 minutes and a demold time of about 20 minutes (both, depending on mass).
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Viscosity
Made by:
45
Amber
1 : 1 by vol
5 min
20 min
500 cps
Order #
Size
Weight
Price
Buy me
66C45A
Pint kit - Smooth Cast 45D
(contains: 1 pt. part A, 1 pt. part B)
2lbs.
$24.99
66C45B
Gallon kit - Smooth Cast 45D
(contains: 1 gal. part A, 1 gal. part B)
16lbs.
$94.99
66C45C
5Gallon kit - Smooth Cast 45D
(contains: 5 gal. part A, 5 gal. part B)
16lbs.
$444.99

Smooth Cast 60D
Smooth-Cast™ 45D & 60D are new low viscosity semi-rigid urethane plastics that are mixed 1A:1B by volume (no scale required).
A fully cured sheet of Smooth-Cast 60D exhibits less flexibility.
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Viscosity
Made by:
60
Amber
1 : 1 by vol
5 min
20 min
1500 cps
Order #
Size
Weight
Price
Buy me
66C60A
Pint kit - Smooth Cast 60D
(contains: 1 pt. part A, 1 pt. part B)
2lbs.
$24.99
66C60B
Gallon kit - Smooth Cast 60D
(contains: 1 gal. part A, 1 gal. part B)
16lbs.
$94.99
66C60C
5Gallon kit - Smooth Cast 60D
(contains: 5 gal. part A, 5 gal. part B)
16lbs.
$444.99

Clear Flex 50
Clear Flex 50-A perfectly clear flexible material that does not need to be vacuum cast. The super-low viscosity allows easy bubble release. This rubber is actually being used more as a casting material than a mold material, but when used for molds, offers the convenience of being able to see through it for easy cutting. Unfortunately, either a heated post-cure or a week at room temperature is required, so time becomes an issue.
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
50
Water clear
1 : 2 by wt
25mins.
24 hrs
To order, click here

Clear Flex 95
A perfectly clear flexible material that does not need to be vacuum cast. The super-low viscosity allows easy bubble release. This rubber is actually being used more as a casting material than a mold material, but when used for molds, offers the convenience of being able to see through it for easy cutting. Unfortunately, either a heated post-cure or a week at room temperature is required, so time becomes an issue.
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
95
Water clear
1 : 1.5 by wt
25mins.
24 hrs
To order, click here




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