From engines to industrial equipment, how does the small flat sealant safeguard the operational line of defense of equipment?

In automotive engines, gearboxes, pumps and valves, gearboxes, and various types of mechanical equipment, a seal between two metal mating surfaces may seem insignificant, but it directly determines whether the equipment can operate stably.

If the wrong sealing material is selected, the equipment may experience oil leakage, water seepage, seal failure, and other issues, which not only increases maintenance and rework costs but may also affect production schedules.

Therefore, products that were once simply called "silicone" by many purchasers and maintenance personnel are now gradually evolving from ordinary maintenance consumables to industrial sealing materials that require careful selection based on equipment operating conditions.

While "silicone" is a common term, industrial selection cannot be handled casually

In the automotive repair market, hardware market, and industrial procurement processes, adhesives used for sealing engines, gearboxes, and metal flanges are often collectively referred to as "silicone".

This term facilitates communication but is not accurate enough.

From an industrial application perspective, the more standard names for such products are usually flat sealant, silicone rubber sealant, flange sealant, or liquid gasket.

Among them, flat sealant is mainly classified by application scenarios, commonly used in sealing scenarios such as mechanical assembly, metal flanges, equipment casings, and oil surface mating. Silicone rubber focuses more on the flexible state formed after the material cures, while "silicone" is more of a common term in the market.

In other words, the name can be simplified, but actual selection still needs to return to the equipment structure and operating conditions.

Why do products with the same name "silicone" sometimes have completely different performance?

Airuisen New Materials Co., Ltd., located in Dongguan, has found through long-term exposure to procurement demands for industrial adhesives that although different customers are looking for "high-temperature resistant silicone" or "engine sealant", their actual operating conditions may be completely different.

Some products are used in automotive engines and gearboxes and need to contact oil; some are used in pumps, valves, and mechanical housings, requiring consideration of pressure and vibration; some are used in metal flange assembly, with more specific requirements for sealing gap and adhesive filling ability.

If purchasers only focus on color, price, or product name while ignoring flange material, operating temperature, contact medium, and assembly gap, it is easy to make selection deviations.

This is why some products work normally on one piece of equipment but may experience insufficient curing, insufficient filling of the sealing surface, or re-leakage after running for a period of time when moved to another seemingly similar part.

What conditions should a suitable flat sealant match?

The selection of industrial flat sealant usually requires comprehensive judgment of multiple factors.

First, clarify the specific application part.

Engine oil pans, gearbox housings, pump bodies, valves, gearboxes, and mechanical end covers have different structures, so their requirements for sealing materials also vary.

Second, confirm the material and structure of the sealing surface.

The surface conditions of materials such as aluminum alloy, cast iron, and stainless steel are different; rigid metal flanges and mating surfaces that may undergo slight deformation may also put forward different requirements for the flexibility, filling property, and curing conditions of the adhesive.

Operating temperature and contact medium are equally important.

The continuous temperature and short-term peak temperature during equipment operation, as well as whether the adhesive contacts engine oil, gear oil, water, coolant, or other industrial media, will affect the final product selection.

In addition, purchasers should also consider:

• The actual gap between the two mating surfaces;
• Pressure and vibration during equipment operation;
• Assembly time after adhesive application;
• Allowable waiting time for curing;
• Whether disassembly and maintenance are needed later;
• Single usage amount and batch construction method.

The more complete the information, the more accurate the product selection.

Airuisen extends product supply to selection and testing

Focusing on application scenarios such as mechanical assembly, flange end faces, oil surface mating, and equipment maintenance, Airuisen continues to improve its flat sealant product series.

Different from simply recommending products by name, Airuisen emphasizes first understanding the customer's actual operating conditions before determining the suitable product direction.

When submitting procurement demands, customers can provide information such as equipment name, sealing part, flange material, operating temperature, contact medium, sealing gap, and expected procurement quantity. After preliminary screening based on these conditions, sample testing will be carried out on actual workpieces.

Sample testing can focus on observing the construction state, curing condition, medium resistance performance, and sealing effect after equipment operation. After confirming that it meets the usage requirements, proceed to packaging specifications and bulk procurement.

This approach of "clarify operating conditions—match product—sample verification—bulk delivery" helps reduce the trial-and-error cost of enterprises in the procurement process of industrial adhesives.

When selecting flat sealant, do not only look at color

Industrial silicone and flat sealants on the market have various appearances such as red, black, gray, and transparent. Many users habitually associate red with high temperature resistance and black with oil resistance.

In fact, color is mainly used for product appearance and identification, and cannot directly represent specific performance.

Different products may have differences in operating temperature, medium resistance, curing method, and applicable gap. The truly reliable basis should be confirmed product information and test results under actual operating conditions.

Construction process also affects sealing effect.

If old adhesive is not cleaned thoroughly, metal surface has residual oil, adhesive application is discontinuous, adhesive layer thickness is unreasonable, or the specified curing conditions are not met after assembly, even if the product direction is selected correctly, the sealing effect may still decrease.

Therefore, a stable industrial sealing solution not only includes the product itself, but also surface treatment, adhesive application method, assembly time, and curing management.

Behind an industrial silicone is more detailed manufacturing requirements

As manufacturing enterprises' requirements for equipment stability, product quality, and production efficiency continue to increase, the procurement of industrial adhesives is gradually shifting from simple "buying a tube of adhesive" to a systematic collaboration of product selection, sample testing, packaging confirmation, and bulk delivery.

Airuisen New Materials Co., Ltd., established in 2014, continues to improve its service process around selection consultation, sample testing, procurement matching, and packaging delivery for industrial adhesives.

In Airuisen's view, what industrial customers really need is not just a tube of sealant, but a product that can adapt to the equipment structure, construction process, and operating environment.

Whether it is called flat sealant, silicone rubber, or industrial silicone, it ultimately needs to return to actual operating conditions.

Only when the product matches the equipment structure, operating temperature, contact medium, and sealing gap can equipment leakage, repeated maintenance, and production rework be reduced, making an ordinary industrial silicone truly a sealing line of defense for stable equipment operation.

Contributor: Airuisen New Materials Co., Ltd.