90 Shore A Two-Part Cast Industrial Rubber Rod/Roller Liquid Urethane Rubber

Product Description
Liquid polyurethane rubber is composed of components A & B, B is a vulcanizing agent, and A is a polyurethane prepolymer. It can also be used as concrete or cement stamping dies, and to make hard and durable rubber parts for mechanical or automotive applications.
feature:
application:

mix:
Shake sides A and B vigorously. Shake or stir well before use Liquid ingredients may settle in container during storage. Let it sit for a few minutes to allow any air bubbles to rise to the surface after shaking the container.

Measure equal volumes of A and B into clean plastic or metal containers.
Combine both sides into a third clean mixing container and mix vigorously for at least one minute, taking care to scrape the sides and bottom of the mixing container with the mixing utensil, until the product is uniform in color.
notes:
1. Always wear a respirator or self-contained breathing apparatus when using polyurethane.
2. Use in a humidity controlled environment between 65F and 75F.
5. Mix in a clean plastic container. Paper cups and wooden stirring utensils can contain moisture, which can adversely affect urethane rubber. Avoid waxed paper cups, as the wax may melt and stain the rubber.
6. Bubbles in polyurethane are almost always caused by moisture. Do everything possible to keep moisture out of the mixture.
7. Put the lid on the container immediately after use. Do not use urethane rubber in rainy weather or when there is high humidity.
8. Avoid pouring on unsealed water-based products such as plaster or hydrocal. Seal the plaster or hydrocal with a product such as Krylon Clear Acrylic.
9. Avoid mixing large batches – the larger the batch size, the more exotherm or heat will be generated during the cure cycle. If you're making large molds, mix up small batches to make the process more manageable.