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Our New/Improved Mold Making Casting Resin Systems For Professionals

Northstar Polymers has renewed its mold making resin product line.  The new formulas have better tear resistance, lower viscosity, and easier handling.  We offer competitively priced manufacturer-direct premium materials, which are comparable to the popular products by well-known brands, toward processional mold makers.





Product Code


Mix Ratio (vol.)

Pot Life (Pour Time)

 Die-C Tear Strength





15 min

134 pli





15 min

248 pli





15 min

140 pli





















Let's Compare


The physical properties of cured mold/parts made of our new mold making compounds are comparable to some of the popular mold making compounds from our competitors. 


Similar products to MPP-A40E include:

        VytaFlex-40 (From Smooth-On) and Poly 74-41 (From Polytek)



Similar products to MPP-A50E include:
       VytaFlex-50 (From Smooth-On) and Poly 74-55 (From Polytek)


Similar products to MPP-A80E include:
       Poly 75-80 (From Polytek)




















We Are Different


Northstar Polymers is a polyurethane specialist, who is also a formulator and manufacturer of polyurethane resin raw materials for various applications including adhesives, consumer goods, industrial parts, medical grade cushions, and precursor chemicals to coatings, sealants, and foams.  We can offer comparable products to what the above mentioned companies may offer.  However, we do not provide the same services and products.

  • We do not have training materials or lecture sessions.  We do not teach how to make molds.  We do not sell auxiliary materials such as inert gas for storage, mold release, or any other tools/supplies. 

  • Most of our products are made-to-order and we typically need 2 to 3 week lead time.  We do not use local distributors, and all products are made in and shipped from our manufacturing facility in Blooming Prairie, MN 55917 USA.

  • We offer our products in 5-gallon pails and 55-gallon drums.  But we do not offer any smaller container sizes.  We do not sell much of our products individuals.  Typically our customers are professional manufacturers.

  • Our materials are designed to cure within 6 to 8 hours to develop the demolding strength so you can make cast to make molds or parts twice per day to help the production rate.

  • If you are an experienced mold-maker who is looking for a wholesale quantity at a better price, we may be able to help you better.



Please feel free to contact us for any question. 

Email: info@northstarpolymers.com

Tel: (612)721-2911 Ext 119






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Tandem Products, Inc.

DBA Northstar Polymers

3444 Dight Avenue South

Minneapolis, MN 55406

Tel: 612.721.2911

Fax: 612.721.1009

E-Mail: info@northstarpolymers.com