Why SBR or Silicone Is Not a Complete Material Specification

23. Juli 2026

Why "SBR" or "Silicone" Is Not a Complete Material Specification

By Arnold Ji, Co-Founder of SKDK SPORT

"SBR," "silicone," or "PVC" is not a complete material specification.

Two products can use the same base-material family and still look, feel, and perform very differently.

The formulation and production process decide much of what the buyer actually receives.

A Polymer Is Only the Starting Point

A polymer is only the starting point. A finished compound may also contain fillers, plasticizers, pigments, stabilizers, and processing aids.

Change their balance, or change the mixing, curing, and molding conditions, and the final product may show differences in:

Color and surface appearance
Hardness and flexibility
Skin-contact feel
Surface tack and dust attraction
Consistency between production batches

Dust Resistance Is a Good Example

Some surfaces attract dust because they are tacky. In other cases, static charge contributes to dust accumulation.

The solution may involve formulation, processing conditions, antistatic control, or surface treatment — not simply switching to another material name.

For products worn against the body, we also separate two questions:

Does the product feel comfortable?
Does it meet the required skin-contact and market standards?

Material Selection Is Product Development

At SKDK SPORT, material selection is part of product development, not just purchasing. We compare trial products with the approved reference sample before bulk production, including color, flexibility, surface feel, and dust pickup.

This matters for knee supports, ankle braces, and wrist wraps — products where a small formulation change can shift the entire user experience.

Because approving "silicone" or "SBR" is not enough.

The buyer should approve how the finished product actually performs.

For Buyers and Product Developers

Which material characteristic is hardest for you to keep consistent across production batches?

— Arnold Ji, Co-Founder of SKDK SPORT

Frequently Asked Questions

What does SBR actually mean, and is it a complete material specification?

It isn't. SBR, silicone, and PVC name a polymer family — the starting point, nothing more. A finished compound also contains fillers, plasticizers, pigments, stabilizers, and processing aids. Two factories can both say SBR and hand you products that feel completely different. The material name starts the conversation, it doesn't finish it.

Why does the same material feel different from one supplier to the next?

Because of the formulation and how it's processed, not the polymer itself. Change the balance of those additives, or change the mixing, curing, and molding conditions, and you change color, hardness, flexibility, how it feels against skin, and how consistent batch two is against batch one. That combination is what you actually receive.

How do I stop a brace from attracting dust?

First work out why. Some surfaces pick up dust because they're tacky. Others do it because of static charge. The fix might be a formulation change, a processing change, antistatic control, or a surface treatment — not a different material name. Switching from SBR to silicone can fix nothing here and cost you a full re-approval cycle.

What should I actually approve before you go to bulk production?

How the finished product performs, not what it's called. We compare trial samples against your approved reference sample on color, flexibility, surface feel, and dust pickup. For anything worn against the body we keep two questions separate: does it feel comfortable, and does it meet the skin-contact and market standards required where you sell. Those aren't the same test.

Can I reorder the same SBR and expect the same result?

Not reliably. Batch consistency is its own item on the list, separate from hardness or color, because it belongs to the compound and the process rather than the label. If a small formulation shift changes how your wrist wrap feels over an hour of training, you find that out in the market, not in the sample.