Casting Concrete in Polyurethane vs. Silicone Rubber Molds
Here at Polytek, we often recommend the use of liquid polyurethane rubber to make molds for concrete casting (e.g., concrete tiles...
Tutorials
Architectural Restoration: Making a Rubber Site Mold to Replace a Damaged Column
Project: Architectural Restoration: Making a Rubber Site Mold to Replace a Damaged Column This commercial building is bei...
Casting Foam in Polyurethane Rubber Molds
Use Silicone Rubber (if you have it available to you) Ideally, silicone rubber molds should be used when casting polyurethane foam. Sil...
How to Make a Concrete Sign
The following tutorial is the process we used to create concrete Polytek® signs for our exhibit at the World of Concrete tradeshow...
How to Make a Two-Part Rubber Mold of a Baluster
This tutorial shows the process of creating a two-part polyurethane rubber mold of a wooden baluster. In this case, concrete...
Colored Dyes for Polyurethane Plastic & Polyurethane Rubber
PolyColor dyes are designed to color polyurethane plastics and polyurethane rubbers. Dyes are available in black, brown, blue, green, r...
Should I Use Polyurethane Mold Rubber or Silicone Mold Rubber?
You’re in the planning stages of your mold making project and you need to decide which rubber is more suitable for your process: polyur...
How to Make a Rubber Mold for Casting Concrete Tiled Panels
Rubber panel molds made for casting concrete can be created from a variety of natural textures. In this case, Travertine tile was used....