Junma High-performance sealing materials for outdoor power equipment

Junma Sealing Materials has developed a series of high-performance sealing materials specifically engineered for the demanding conditions of outdoor power equipment. These materials are applied to critical components such as engines, exhaust pipes, crankshaft cases, oil pans, and cylinder head gaskets in small engines and outboard motors. Outdoor power equipment frequently operates under continuous vibration, high temperatures, oil corrosion, and harsh climatic conditions. The performance of its seals directly determines the equipment's power output, emission levels, service life, and user experience. Failure at any sealing point can lead to power loss, fluid leakage, increased noise, or even equipment shutdown. Therefore, selecting sealing materials perfectly matched to operating conditions is a critical aspect of product design.

Junma Seals Core Materials and Application Analysis

1. Engine and Transmission System Seals

• Cylinder Head Gasket Seals: Junma Seals' composite materials JM-C01 and JM-GC01 are renowned for their exceptional high-temperature stability, creep resistance, and sealing compensation capabilities. They effectively withstand high-temperature, high-pressure combustion gas impacts between the cylinder head and block mating surfaces, ensuring long-term reliability of the engine's core seal.

• Crankcase and Carburetor Seals: For crankcases exposed to oil-fuel vapor mixtures and pressure, Junma Seals recommends JM-G02 material. For oil pans, JM-S02 is recommended. These rubber-based sealing gaskets offer excellent oil resistance, flexibility, and conformability, maintaining reliable sealing even under fluctuating bolt preload and minor housing deformation.

• Oil Pan: Utilize Junma Sealing material JM-S01. This controllable swelling compound offers outstanding compressibility and resilience, delivering reliable sealing performance under low flange pressure and uneven flange surfaces.

2. Exhaust System Sealing

The exhaust system is one of the harshest operating environments in equipment, subjected to prolonged exposure to high temperatures, corrosive exhaust gases, and condensation acids. JM-EG is recommended. JM-EG withstands instantaneous high temperatures and continuous thermal cycling in exhaust pipes while effectively compensating for joint gap variations caused by thermal expansion and contraction.

3. Dustproof, Waterproof, Oil-Resistant Sealing for Cylinder Head Covers, Junction Boxes, etc.Junma JM-X01, a material based on cork and SBR styrene-butadiene rubber, offers exceptional vibration damping, sealing, and rebound properties. It provides excellent compensation for irregular or easily deformed economical flanges.

The Junma Sealing Series materials (G series, S series, E series, C series, and H series) represent a systematic solution for the complete sealing chain of outdoor small power equipment. Their key features include: eco-friendly asbestos-free composition, outstanding durability, exceptional environmental adaptability, and precise performance under demanding conditions.

Advanced sealing technology is a critical enabler for achieving greater efficiency and cleaner operation in outdoor small power equipment. We look forward to applying these superior sealing solutions to more advanced equipment, collaborating with global industry partners to drive progress and development across the entire sector.