Polyurethane mold rubber

PU80 polyurethane liquid mold rubber is mid-range to firm hardness (Shore A60 – A90), high-performance. 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.

Most concrete mixes and polyurethane resins require a suitable release agent.

Vacuum degassing mixed material using a vacuum pump and chamber to remove entrapped air is recommended.

Polyurethane Rubber

Features

  • Two-part polyurethane rubbers
  • High hardness A60 – A90, which silicone rubber unable to reach
  • Super-strength, 3 times strenght than silicone rubber, high abrasion-resistant, super-tough rubbers
  • Reproduces fine details and textures
  • Long-lasting, economical
  • Ideal for high volume casting applications
  • All rubbers can be demolded after ~16 hours
Polyurethane rubber

Typical Uses & Casting Materials

Primarily used for high production concrete casting, forming, texture mats and concrete stamps.

Instruction

  1. Stir Part A well before use, Stir Part B well before use.
  2. Vacuum degas air of Part A and Part B first.
  3. Weigh 100 Part A to 100 Part B using an accurate scale and a clean mixing container.
  4. Vigorously mix and scrape walls of the container, continue mixing fast within 2 minutes until uniform.
  5. Pour the mixture 2-3 inches above the pattern in a thin stream.
  6. Initial cure, heat the mold in the oven under 100℃ for 0.5-1 hour then demold with care.
  7. Final cure, heat the mold in the oven under 100℃ for 4-5 hours again or put into production after 7 days.

Important tips

  • Before use, read the operation manual, please.
  • Before large production, a small-scale test is recommended.
  • Mixing A&B fast, within 2 minutes
  • Use a vacuum to de-gas this product before use under pressure. Vacuum for 2-3 minutes
  • A release agent is required
  • In order to get the best performance, heat to cure is strongly recommended.
  • Use a casting machine to operate is strongly recommended.
  • Both Parts A and B react with atmospheric moisture and, therefore, should be resealed or used up as soon as possible after opening.

Package

Polyurethane rubber e1578115870150

Storage & shelf-life

9 months in unopened containers when properly stored.

Both Parts A and B react with atmospheric moisture and, therefore, should be resealed or used up as soon as possible after opening. Before resealing, a heavier-than-air, dry gas, can be sprayed into open containers to displace moist air and extend storage life.

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