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Concrete Casting: Cast Stone Veneer

Mold Rubbers for Veneer Stone ProductionPolytek® liquid mold rubbers are the mold material of choice for high-volume veneer stone production (manual or automated manufacturing). These two-component mold rubbers capture excellent surface detail, offer exceptional dimensional stability and have unmatched lifetime and durability compared to hot melt and polypropylene systems. 

Molds made from these room temperature curing systems can be completed in a much shorter timeframe (~16 hour demold) compared to latex rubber molds. When properly maintained, these molds can last for years and produce thousands of stones.  

Popular product options are listed below:

Select an option below for additional product details and buying information or browse all polyurethane mold rubbers or silicone mold rubbers:



Product Description

Poly 74-20 Liquid Rubber

A soft polyurethane rubber popular for multi-cavity molds. Can be thickened with PolyFiber II or Fumed Silica to make brush-on molds.

Poly 74-45 Liquid Rubber

A mid-range hardness polyurethane rubber popular for panelized systems. Can be thickened with PolyFiber II or Fumed Silica to make brush-on molds.

PlatSil® 73-29 Silicone Rubber

A medium hardness, platinum-cured silicone rubber that does not require form release. Can be thickened with PlatThix Liquid Thickener or Fumed Silica to make brush-on molds.

How-To Articles & Customer Projects

Creating Permanent Masters for Mold Making
This article focuses on how to make hard rubber or plastic copies of original masters