40 Shore A Liquid Urethane Rubber for Concrete Wall Block Molds

Liquid polyurethane rubber for making wall block molds:

Application of liquid polyurethane rubber in wall block molds:

Instead of silicone rubber to make "cultural stone" molds. It is also suitable for electrical equipment potting, rubber rollers, skis, snowboards, rubber sheets, rubber wheels, shoe molds, etc.

Technical Data Sheet

mix:
Shake sides A and B vigorously.
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.

 tip:
Always wear a respirator or self-contained breathing apparatus when working with polyurethane.
Use between 65F and 75F in a humidity-controlled environment.
AeroMarine Products Concrete Molding and Stamping Rubber 75A Polyurethane is moisture sensitive.
Use only clean plastic and/or metal mixing utensils and containers.
Do not use paper or wood.
Recap the bottle immediately after use.
The Extend-It Aerosol Nitrogen Blanket can be used to protect products from moisture contamination.
Never mix less than 3 oz of product as this ratio is difficult to measure and will take longer to cure since the exothermic reaction does not generate much heat at this volume.
Avoid mixing with electric drills as they create friction and mixing with electric drills will initiate the exothermic curing process and cause the product to cure in the mixing container.
It is always best to mix materials by hand using a plastic or metal mixing utensil.
Do not change the mix ratio. Changing the mix ratio to change the cure cycle does not work with polyurethanes, unlike some polyester resins.
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.
Bubbles in polyurethane are almost always caused by moisture. Do everything possible to keep moisture out of the mixture. Put the lid on the container immediately after use. Do not use urethane rubber in rainy weather or when there is high humidity. 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.
Avoid mixing large batches - the larger the batch, the more exothermic 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.
Shake or stir well before use - liquid ingredients may settle in container during storage. Shake or stir each component thoroughly before mixing. Let it sit for a few minutes to allow any air bubbles to rise to the surface after shaking the container.

Liquid polyurethane rubber packaging for molding and casting:

20kg/barrel, 25kg/barrel or 200kg/barrel

Professional manufacturer of liquid polyurethane rubber for mold casting:

We are manufacturer, specialized in producing silicone rubber and polyurethane rubber with different hardness and different viscosity, we have price competitiveness and quality.

If you are looking for RTV2 Liquid Silicone Mold Rubber, please click the image below.