Products and Processes

Hebei Shida Seal Group manufactures custom EPDM rubber seals, co-extruded trim seals, push-on type trim seals, bulb trim seals, edge protection sealing profiles, wheel chocks for heavy truck markets.

• Primary door sealing system
• Heavy truck rubber sealing system window belt line seal
• Heavy truck engine, compartment and under hood seals
• Heavy truck rubber sealing system glass run channel seal
• Glass run channel sealing system
• Door seals
• Dynamic window seals
• Static window seals
• Compartment seals
• Under hood seals
• Body fascia seals
• NVH isolators / Rubber NVH isolator for a fuel tank strap
• AC insulators
• Engine seals
• Tubing
• Silicone engine seal
• Compartment seal
• Hood to cowl seal

Hebei Shida Seal Group manufactures fireproof rubber seals, gaskets, profiles, extrusions, window and door seals for automotive, cabinets, enclosures, and mass transit industries. 

Our fireproof rubber seals are made for cars, buses, trains, trucks, ships, and boats, these interior and exterior vehicle components use fireproof materials that meet industry standards and fire protection specifications.

Description: D-Shaped EPDM Sponge Rubber Seal (Gasket) 3/4″W x 9/16″D with 3M Adhesive Strip 4229P

Seal Height: 9/16″

Seal Width: 3/4″

Ozone resistant EPDM sponge rubber

3M™ 4229P tape system with peel-off liner

Recommended temperature range of -20°F through +150°F

Excellent resistance to water absorption, ozone, sunlight aging, low temperature, and compression set

Optimum compression is 25%

Recommended maximum compression 25%-40%

Our fireproof rubber seals meet FMVSS 302 – Flammability of materials used in the occupant compartments of motor vehicles. FMVSS 302 from the U.S. National Highway Safety Traffic Administration (NHTSA) specifies burn resistance requirements for materials used in occupant compartments. Technically equivalent to ISO 3795 and ASTM D5132-04, FMVSS 302 applies to buses, trucks, passenger cars, and multi-purpose passenger vehicles. 

Fire Retardant Rubber Seal

Slip Coat

A slip coat is a coating applied to the surface of a seal in order to reduce abrasion and increase seal life. Usually slip coating is applied to glass run channel and other dynamic seal applications. The job of the slip coat is to keep the seal working – allowing, for example, a glass window to move in and out – while not scuffing or marring the material running in and out of its channels. Slip coats keep seals from being harmed by cleaning products, they don’t fade over time, and generally are weatherproof.

Flocking

Flocking is similar to slip coating but has a definite look and texture. The process involves applying a flocking spray or flocking powder to the surface of the seal to insulate, absorb water, dampen vibration, and reduce friction. Most flocking is black because the seal it is attached to is also black. Flocking is found in auto windows – and in many other applications demanding weatherproofing of some sort.

Tape

Tape is a means of attaching a seal to another surface. Usually the seal is manufactured with an adhesive side affixed in place on the seal and a second adhesive side protected by a covering which is removed during a later stage of the manufacturing or assembly process.

Attachment

A seal attachment includes adhesives and mechanical fasteners. Both are meant to join a seal to another surface and each as its pro’s and con’s. Adhesive attachments (including tape) can be temporary or permanent and may work in conjunction with mechanical fasteners. Mechanical fasteners include wire carrier seals, kerf insertions, multi-durometer extrusions, and push-pin seals, one of the most common in the auto industry.

• Blooming: A phenomenon that occurs when compounding agents in rubber migrate, or bloom, to the surface, causing a dusty or milky looking film. This is due to the agents’ limited compatibility with the rubber elastomer and affects the tensile strength, adhesion properties, and appearance of your part.
• Slipcoat: A non-drip lubricant applied to the surface of seals to reduce friction and increase surface smoothness and abrasion resistance.
• Flock tape/spray: An adhesive tape or with a non-woven coating on one side or an adhesive non-woven spray that is used to reduce friction between two surfaces or reduce reflection.
• Hollow: A hollow area, usually ¼” to 5” in diameter, in a profile design made by placing a pin or mandrel inside the die.
• Durometer: A measurement usedto indicate the hardness of a material, defined as a material’s resistance to permanent indentation.
• Compression set: The permanent indentation remaining when a force that was applied to a material is removed. There are two ways to measure compression set: Compression set A measures the materials thickness before and after pressure is applied. Compression set B measures the material thickness after the material is compressed to 25% of its original height.
• Insertion/extraction forces: The forces applied to the seal during assembly and disassembly in its final application.
• Insert molding: Molding one material (plastic) around another (metal) such that the final component is single unit with reduced assembly and labor costs, reduced the size and weight of the part, improved component reliability, and improved part strength and structure with enhanced design flexibility.

Pre-applied Butyl Sealant

For better insulation properties, we can add / inject Butyl to trims, and seals such as door weatherstrips, trunk seals, trim seals, rubber edge trims, door sealings, edge protectors, edge protection sealing profiles can be provided with pre-applied butyl sealant at an additional cost to provide an improved grip and a positive seal with excellent heat reistance.

Keywords: rubber extrusions with injected butyl, rubber seals with butyl, rubber profiles with injected butyl, edge trims with butyl, butyl sealant, Butyl Injection, rubber edge trim with butyl adhesive