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Rubber AdditivesRubber Additives

Not All Rubber is Created Equal.

Over six months ago, we met the team from a rubber factory located in Northern Guangdong province. The factory was a small operation, with only a few production lines, but they produced for reputable brands like Keen and Reebok. Their location was nearby our steel mold maker, so it was a good match. 

Our initial samples came back with thick parting lines (the seams between parts of a rubber mold), often a result of too much rubber being pushed into the mold. The trimming required to correct this is largely dependant on human craftsmanship, and this can be a difficult thing to consistently control. 

Sample after sample, nothing changed. At Casca, we offer a lifetime guarantee and are committed to the utmost attention to detail. When something doesn't feel right, we move on and continue to search for the best of the best. 

Old Rubber Shoe MoldsDefunct Rubber Molds

The Scavenger Hunt.

As an emerging brand, convincing high-end suppliers to do business with you is often a huge challenge. With small order sizes and the additional development time required for new ventures, we’re not always the most attractive candidate for their already successful business. Our development agency has gone to bat for us on multiple occasions; they have such a deep understanding and belief in our vision, they’ve been instrumental in relaying this message to suppliers and enabling us to work with the premier factories in China.

When you don’t have a connection with a great supplier, often, the way to find amazing factories is to work your way backwards. Research the brands with the best rubber in the world, use online tools to find out where they’re receiving shipments and follow the trail. So we did just that, we looked at the global leader in traction and grip, a world-renowned Italian rubber company (we're sworn to secrecy) and found their long-term supplier in southern China.

Small Step, Giant Leap.  

Before starting any development, we visited the factory. On the factory floor, we could discuss our ideas, see what leading brands were doing and explore how we could improve on the processes. From their focus on innovation to their development of new compounds and processes, we were extremely impressed. In addition, the factory’s testing labs were extensive, and the variety of tests they perform are done in the most extreme temperatures and conditions. 

There are a number of factors that go into a rubber sole. From the interactions of compounds and densities, to the importance of tailoring different areas for different requirements in grip and stress, we’re continuing to learn and develop new solutions. We could send a thousand emails back and forth, we prefer the hands-on approach.

In the end, the products will speak for themselves. Try them for 30 days and if you’re not convinced, we’ll take them back, no questions asked. And be sure to check out some more images below! 

Rubber Blanks for StampingRubber Blanks for Stamping

Rubber Molding on the Factory FloorRubber Molding on the Factory Floor

Rubber Trimming and FinishingRubber Trimming and Finishing

Finished Avro Outsole

Shop the Avro and Avro Knit now.