What Quality Tests Matter for Silicone Products?

Hardness is one of the first properties normally considered when developing a silicone product because it affects feel, flexibility, support, and assembly.

It is not enough to judge the entire material by hardness alone.

ASTM D1415 defines international rubber hardness testing as a measurement based on the penetration of a specified indenter into the material. This provides a useful reference for material comparison, but two silicone compounds with similar hardness can still behave differently under tension, compression, heat, or repeated deformation.

For Custom Silicone Products, material selection should therefore consider the complete application rather than one specification.

Many silicone products are repeatedly stretched, compressed, installed, and removed during normal use.

Insufficient tensile strength can make installation more difficult, while poor tear resistance may allow a small cut or weak point to grow over time.

Compression behavior is also important for components that remain under pressure for extended periods.

ASTM D395 specifically evaluates compression set to determine how well rubber retains its elastic properties after prolonged compression. The standard notes that such testing is particularly relevant to applications involving sustained compressive stress.

For Silicone Protective Cases and other flexible components, this type of testing provides information that visual inspection cannot reveal.

Real-world silicone products may be exposed to heat, humidity, ultraviolet radiation, and changing environmental conditions.

This becomes especially relevant for automotive components and products used outdoors.

That makes silicone aging resistance an important consideration during product development.

WJM's testing capabilities include UV accelerated weathering equipment and programmable temperature and humidity testing equipment. These tests can be used to evaluate how products respond to simulated environmental conditions.

For Automotive Silicone Parts, environmental testing is particularly useful because vehicle applications can expose materials to conditions that are very different from normal indoor use.

Protective products should not be evaluated without considering how they will actually be used.

A POS terminal cover may experience repeated handling, friction against work surfaces, and occasional drops. An industrial device cover may face a more demanding working environment.

WJM's quality testing equipment includes drop impact testing and multifunctional abrasion testing.

These tests help determine whether a product develops visible damage or performance problems after repeated physical stress.

For a POS Protective Case, the real question is not simply whether the product can survive one drop. It is whether the protective structure remains effective after repeated handling and everyday wear.

There is no universal testing package for every silicone product.

The appropriate testing combination depends on the application.

Protective covers may require attention to drop resistance, abrasion, tear resistance, dimensional stability, and fit.

Automotive silicone components may require greater emphasis on weather resistance, temperature changes, and material stability.

Industrial protective components may need testing related to impact, friction, humidity, temperature, and repeated use.

Effective durability testing silicone products is therefore not about adding as many tests as possible. The goal is to reproduce the conditions that matter most in actual service.

Testing should not simply determine whether a finished product passes or fails.

It should also help identify where improvements are needed.

Unexpected changes after weathering may point to material selection issues. Dimensional changes may require a review of tooling or molding parameters. Abrasion damage may indicate that the material or surface structure needs adjustment.

WJM combines product development, tooling, molding, and quality control within an integrated manufacturing system. Company materials indicate that its core R&D team includes 12 members with experience in product design, development, and manufacturing processes.

This connection between testing and manufacturing is particularly valuable for customized silicone products because quality control should influence the next production decision rather than simply document the previous one.

Conclusion

Silicone quality cannot be judged by appearance or hardness alone.Material strength, tear resistance, compression behavior, environmental stability, abrasion resistance, and dimensional consistency can all affect product life.

For silicone product manufacturing, a better approach is to build a testing plan around the actual application and use the results to refine material selection, tooling, and molding conditions.

WJM has testing capabilities covering UV weathering, salt spray, drop impact, temperature and humidity, and abrasion, supported by established quality management systems.