How to choose a suitable rubber protective agent for rubber casters?

When selecting a rubber protective agent, you should consider three key factors: rubber compatibility, functional requirements, and usage scenarios. This helps avoid problems like rubber swelling and hardening caused by inappropriate protective agents. Specific steps are as follows:

1. Prioritize compatibility between the protective agent and the rubber.

Different rubber materials (such as natural rubber, nitrile rubber, and EPDM) have different tolerances to chemicals, so you should choose a non-corrosive, low-irritation protective agent.

General-purpose options: Silicone-based protective agents (such as silicone sprays and silicone greases) are preferred. They are chemically stable and compatible with most rubber materials. They won't cause swelling or cracking, and they form a protective film on the surface to keep out moisture and dust.

Tips to avoid: Avoid using protective agents containing petroleum-based ingredients (such as motor oil and diesel) or strong solvents (such as alcohol and acetone). These substances can damage the rubber's molecular structure, causing the wheel to become soft, sticky, or hardened and brittle.

2. Select a type based on core functional requirements.
Different scenarios require different protection options. Choose the right one based on your needs:
Anti-aging/High-temperature Resistance: If the casters are used in high-temperature environments, such as kitchens or near heaters, choose a silicone-based protectant containing antioxidants (such as benzotriazole antioxidants). This can slow down the hardening and cracking of the rubber caused by high temperatures.
Moisture/Mold Resistance: For use in humid environments (such as basements and car washes), choose a protectant with mildew-resistant properties (such as a silicone emulsion containing a small amount of mildew inhibitor) to inhibit mildew growth and prevent mildew spots on the wheel.
Restoring Elasticity: If the rubber wheel has slightly hardened, choose a rubber-softening protectant (such as a specialized rubber care agent containing a small amount of plasticizer). However, be careful with the dosage; excessive use can cause the wheel to soften and deform.

3. Combine Convenience and Safety
Formula Selection: For daily maintenance, a spray-type protectant is recommended. It is easy to apply and evenly covers the wheel surface and gaps. For detailed areas such as the axle, a paste-type silicone grease can be used for stronger adhesion and longer-lasting effect. Safety Requirements: For applications in food processing plants, medical equipment, and other environments, choose a food-grade or medical-grade rubber protectant (such as an FDA-certified silicone-based product) to prevent environmental contamination from chemical residues.

Summary
The key selection criteria for rubber caster protectants are: silicone-based, compatible with rubber, and functionally suitable for the application. Before use, it is recommended to test a small area on the non-contact surface of the caster to confirm no abnormal reactions before full application to achieve the desired protective effect while preventing damage.