How to use Liquid polyurethane rubber for concrete stone mold making ?

1. Make sure the surface of the original is clean and free of loose material. 

2. Weight 100g Part A and 100g Part B in a clean container.

3. Stir Part A before use thoroughly , as filler separation may occur upon prolonged storage.

4. Mix Part A and Part B evenly until part B completely dispersed in the Part A. 

5. Pour the mixed Part A and part B onto the original mold as soon as possible.

6. De-mold after 24 hours ,it is will improve the replicate times of silicone mold.

Note:It is strongly recommended that entrapped air be removed in a vacuum chamber, allowing the mix to completely expand and then collapse. After a further 1-2 mins under vacuum, the mix should be inspected and can be used if free of air bubbles. A volume increase of 3-5 times will occur on vacuum de-airing the mixture. So a suitably large container should be chosen.

2022-04-22