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Poly 74-Series Liquid Polyurethane Rubbers

Poly 74-Series Rubber MoldSoft to Medium Hardness Urethane Rubbers

Poly 74-Series polyurethane liquid mold rubbers are soft to mid-range hardness (Shore A20-A55), high-performance, room-temperature (RTV) curing systems. They offer superior flexibility and toughness allowing durable molds to be made from relatively simple to highly detailed, complex models. The 74-Series liquid mold rubbers are supplied as pourable liquids but can be easily thickened to make brush-on molds.

These rubbers are commonly used in the following applications: Concrete Casting, Sculpture & Foundry, Architectural Reproduction & Restoration, Millwork & Ornamentation, Candle Making, Industrial Applications, Crafts & Hobby Applications, Theming & Display, and much more.

Plaster and wax can generally be cast in polyurethane molds without any release agent, but most concrete mixes and polyurethane resins require a suitable release agent (e.g., Pol-Ease® 2300 Release Agent).

View all product options within this series under "Product Options" below: 

Video Tutorials

Embedded thumbnail for Making a Poly 74-20 Veneer Stone Mold for Casting Concrete
Making a Poly 74-20 Veneer Stone Mold for Casting Concrete

In this video, we demonstrate making a block mold with Poly 74-20 polyurethane rubber that can be used to reproduce decorative concrete veneer stones.

Embedded thumbnail for How to Create a Travertine Panel Mold for Concrete [Part 2 of 2]
How to Create a Travertine Panel Mold for Concrete [Part 2 of 2]

How to create a mold of a Travertine panel using Polytek Poly 74-45 liquid rubber and then cast concrete.

Embedded thumbnail for How to Create a Travertine Panel Mold for Concrete [Part 1 of 2]
How to Create a Travertine Panel Mold for Concrete [Part 1 of 2]

How to create a mold of a Travertine panel using Polytek Poly 74-45 liquid rubber and then cast concrete.

Embedded thumbnail for Casting “Warped” Concrete Tables in Rubber Molds
Casting “Warped” Concrete Tables in Rubber Molds

This video tutorial details the process of casting side-by-side “warped” concrete tables in a Polytek® Poly 74-45 polyurethane rubber mold.

Embedded thumbnail for How to Bend or Warp Decorative Concrete in Rubber Molds
How to Bend or Warp Decorative Concrete in Rubber Molds

This video tutorial details the process of casting warped decorative concrete elements in rubber molds made from our liquid mold rubber.