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Poly 75-Series Liquid Mold Rubbers
Poly 75-Series polyurethane liquid mold rubbers are mid-range to firm hardness, high-performance, room-temperature curing systems. They offer superior strength, toughness and abrasion-resistance that result in durable molds that capture and reproduce exact textures and the finest detail from any model. Poly 75-Series rubbers offer an optimum blend of economy and performance.
These rubbers are commonly used in the following applications: Concrete Casting, Architectural Reproduction & Restoration, Industrial Applications, Theming & Display, and much more.
Plaster and wax can generally be cast in polyurethane molds without any release agent, but most concrete mixes and polyurethane resins require a suitable release agent (e.g., Pol-Ease® 2300 Release Agent).
View all product options within this series under "Product Options" below:
- Two-part polyurethane rubbers
- Room temperature curing (RTV)
- Shore Hardness Options: A60 – A90
- Pourable or brushable (use PolyFiber II or Fumed Silica to thicken for brush-on application)
- High-strength, abrasion-resistant, super-tough rubbers
- Reproduces fine details and textures
- Long-lasting, economical
- Can be accelerated for rapid cure
- Ideal for high volume casting applications
- All rubbers can be demolded after ~16 hours
Select an option below for additional product specifications and buying information:
Product | Mix Ratio | Shore Hardness | Pour Time | Demold Time | Cured Color |
Poly 75-59 | 1A:1B | A60 | 10 min. | 16 hr. | Amber |
Poly 75-60 | 1A:1B | A60 | 10 min. | 16 hr. | Amber |
Poly 75-65 | 1A:1B | A65 | 35 min. | 16 hr. | Amber |
Poly 75-70 | 1A:1B | A70 | 40 min. | 16 hr. | Gray |
Poly 75-75 | 2A:1B | A75 | 20 min. | 16 hr. | Amber |
Poly 75-79 | 2A:1B | A80 | 20 min. | 16 hr. | Yellow |
Poly 75-80 | 2A:1B | A80 | 45 min. | 16 hr. | Yellow |
Poly 75-90 | 2A:1B | A90 | 10-15 min. | 16 hr. | Opaque Amber |
Softener | Add Poly 74/75 Part C Softener to 75-Series products for a lower-viscosity mix and a softer rubber. |
Accelerator | Add Poly 74/75 Part X Accelerator to 75-Series products to accelerate the cure. |
Thickeners | Use PolyFiber II or Fumed Silica to thicken the liquid mix for application by brush or trowel. |
Reinforcement Materials for Blanket Molds | Use Tietex® Fabric to reinforce blanket molds. |
Product Life Extender | Use Poly Purge Aerosol Dry Gas to extend product life by spraying it into containers before resealing. |
UV Stabilizer | Use UV additive to help reduce the characteristic surface degradation caused by sunlight. |