Liquid Molding











Click to download the Ultraclear™ brochure with full specifications.


Potting & Encapsulation

Functional Prototype Parts

Sculptures & Display Pieces

Custom Lenses

Aftermarket Car Parts


Diamond Clear

UV Resistant

High Heat Distortion

High Tensile Strength

Excellent Impact

Available in Multiple Speeds

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Ultraclear™ 480N Series

A new series of UV resistant water clear polyurethane casting resins that are mercury free, have high physical properties, and are available in multiple gel times.

  • Exceptional clarity with a 1.585 refractive index.
  • Passes UV Exposure Testing(5 year equivilency per ASTM G-155)
  • Available in 10, 20, 40, and 60 min. gel times. (Custom gel times available)
  • High physicals such as: HDT, tensile strength, and impact resistance.

Ultraclear™ can be used in a wide variety of applications that require exceptional clarity; e.g., encapsulation, optical components, test models, and display pieces. The wide range of gel times makes Ultraclear™ suitable for small, average sized or larger castings.


Lens - Ultraclear

Aftermarket Parts

Training Models

Ultraclear Potting and Encapsulating


NOTE: These products may have a negative reaction to some silicone based rubbers and release agents. Contact a Hapco representative for more information.

Handling Properties
480N-20 480N-40 480N-60
Mix Ratio by Volume A:B 100:100 100:100 100:100 100:100
Mix Ratio by Weight A:B 100:100 100:100 100:100 100:100
Gel Time 100 grams @ 25˚C 10 min. 20 min.
40 min. 60 min.
Color (cured) Optically Clear Optically Clear

Optically Clear

Optically Clear

Viscosity mixed at 25˚C 600 600 600 600
Specific Gravity mixed at 25˚C 1.08 1.08 1.08 1.08
Shrinkage .002-.006 .002-.006 .001-.003 .001-.003

Demold Time @ 70˚F
1/8" thick

5-8 hrs.*

12-16 hrs.*

24 hrs.*

24 hrs.*

Weight per cubic inch (lbs)

0.0388 0.0388 0.0388 0.0388

*Demold time can be expedited by applying heat (up to 100°F) during the initial curing phase.

Physical Properties**
480N-20 480N-40 480N-60
Hardness Shore 80D 80D 80D 80D
Tensile Strength (psi) 7,700 7,700 7,700 7,700
Elongation % 13 13 13 13
Flexural Strength (psi) 11,400 11,400 11,400 11,400
Heat Distortion Temperature (C) 77 77 77 77

NOTE: Hardness was tested after curing @ 80°C for 16 hours. For best properties, cure @ room temperature (21-23ºC) and postcure @ 60-80ºC for
4-12 hours. HDT and flexural strength increase with a postcure. Additional post cure at elevated temperature is also recommended to maximize properties.  Izod impact and heat distortion properties increase with postcure heat. The lower the temperature the longer the post-cure.  Hapco recommends a ramp cure to minimize shrinkage; 2 hrs. @ 65°C., 2 hrs. followed by 2 hrs. @ 80°C.