Rubber Mold Making & Casting

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IGC Technologies, LLC partners with Polytek® Development Corp. to distribute High-Performance Room Temperature Vulcanizing (RTV) Liquid Rubbers, Liquid Plastic Casting Resins and Accessories for all Mold Making and Casting Applications.

Individual artists, sculptors, hobbyists, model makers as well as high-volume industrial users rely on these products to accurately mold and reproduce parts quickly, consistently, and cost-effectively. Polytek liquid rubber products can be poured, brushed or sprayed to create a flexible rubber mold that reproduces every detail from the original master, allowing the most complex and detailed objects to be cast and removed with ease. Polytek liquid plastics can be used to create perfectly detailed resin castings, mold shells, prototype parts and decorative objects of virtually any size and shape.

These mold rubbers and liquid plastics are used for numerous applications including architectural restoration, bronze art foundry and industrial foundry casting, ornamental/decorative concrete and architectural pre-cast concrete casting, plaster casting, rapid prototyping, decorative home décor production, stamped concrete texturing, special effects, model making and movie prop development, theme park display manufacturing and much, much more. Uses for products are limited only by the imagination-may yours be limitless!

Upon request, IGC Technologies can provide you with the most complete and versatile line of liquid mold rubber, casting resin and other specialty molding and casting compounds. Pourable, brushable and sprayable urethane rubber, RTV silicone rubber and latex systems range in hardness and flexibility from very soft to extremely firm. A FREE and complete mold making & casting manual and catalog of the Polytek product lines including urethane resin, urethane foam, epoxy plastic, alginate and wax, along with all the necessary accessories and mold release agents are only a phone call away. Contact us at IGC Technologies, LLC 1-800-877-8917 or

Polyurethane RTV Mold Rubbers

Poly 74, Poly 75 & Poly 77 Series Rubbers

Our Most Popular Mold Rubbers!

Artist Mark Sijan, Milwaukee, WI demonstrates the versatility of Polytek and G-P products as they are used to created detailed forms, ranging from the relatively simple apple (below) to the complex life size sculpture (above).

With hardness from A80 to A20, these are versatile mold rubbers. Most have easy 1:1 mix ratio, long working hours and low viscosity. Popular Poly 74 and 75 Series Liquid Rubbers consist of Part A and Part B that, after mixing, cure overnight at room temperature to be flexible and high-strength mold rubbers. Poly 74 and 75 Series Rubbers make durable, easy releasing molds for casting plasters and waxes without release agents, but when used with proper release agents are also excellent for casting cement, epoxy, polyester, urethane and acrylic.

Poly 77 Series RTV Liquid Rubbers also feature easy to use formulations with 1:1 mix ratios and hardnesses ranging from Shore A50 to A65. These high-performance, high-elongation rubbers are formulated to provide excellent abrasion and tear resistance for maximum mold life and performance as well as ease in demolding when used in demanding casting applications.

Poly 81 Series RTV Liquid Rubbers are used to make firm molds, mold facings, stamping tools, industrial parts, rollers, gaskets, mold shells bumpers or pads. They offer low sensitivity to moisture, and low viscosity for easy vacuuming, if necessary.

Polygel® Brushable/Sprayable Mold Rubbers are without equal for brushed or sprayed blanket molds. Brush Polygel on vertical or overhead surfaces. Sprayable Polygel products are ideal for large surface area applications where brushing may be impractical. Polygel products bond well to many surfaces and should be evaluated as adhesives and sealants. Remember, when brushing Polygel rubber, allow the first coat to gel enough so that the second coat will not disturb it (usually 1 hour is adequate), then apply a second coat being careful to cover any thin spots in the first application.

IGC Technologies can provide the quality materials you need to get the job done right!

Silicone RTV Liquid Mold Rubbers

Poly-Sil® Mold Rubbers make molds that are easy releasing and stable at higher temperatures. Products range in hardness from a very soft Shore A10 to a firm A60. They are excellent for casting plasters, waxes, cements, low melting metals and many resins such as epoxies, polyesters, urethane and acrylics. Molds made from these high-performance products such as PlatSil® 71-15 are best for casting harsh resins which will easily pull away from the cast resin part. The smooth, release-free demold of silicone is especially welcome on highly detailed parts.

For a FREE Manual and Catalog on all Polytek RTV Mold Rubbers, contact IGC Technologies, LLC at 1-800-877-8917 or .