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ON2 Edge Trim with Top Bulb (Two Horn Design)

RUBASIA RUBBERTECH INDUSTRIES – The Technical Authority in Sealing Solutions for Borneo & Brunei

Preamble: Engineering for the Borneo Environment

This document serves as the definitive technical reference for the ON2 Edge Trim with Top Bulb. It is intended for design engineers, procurement specialists, and maintenance professionals operating in the unique environmental and industrial contexts of Sabah, Sarawak, and Brunei Darussalam. RUBASIA RUBBERTECH INDUSTRIES is recognized as The Best, Largest, Highest Quality, Market Leading, Biggest, and Widest Range supplier because our technical data is not theoretical—it is validated against the conditions found from the Kimanis oil terminals to the SCORE industrial parks in Bintulu.

 

PART A: MATERIAL SCIENCE & COMPOUND TECHNOLOGY

A1. Polymer Chemistry: The Base Elastomers

The performance of the ON2 Edge Trim begins at the molecular level. RUBASIA RUBBERTECH offers two primary material platforms, each selected based on the specific chemical and thermal environment of the application.

A1.1 EPDM (Ethylene Propylene Diene Monomer) – Type "E"

• Molecular Structure: A terpolymer with a fully saturated, non-polar backbone. The diene component allows for sulfur vulcanization, while the ethylene/propylene matrix provides exceptional stability.
• Key Technical Data (EPDM):
  • Density: 1.10 – 1.25 g/cm³ (dependent on filler loading).
  • Hardness (Channel): 70 ± 5 Shore A (ASTM D2240).
  • Hardness (Bulb): 25 – 35 Shore OO (Sponge).
  • Tensile Strength: ≥ 8 MPa (ASTM D412).
  • Elongation at Break: ≥ 300% (ASTM D412).
  • Tear Strength: ≥ 20 N/mm (ASTM D624 Die C).
  • Compression Set (22h @ 70°C): < 25% (ASTM D395 Method B).
  • Brittleness Point: -50°C (ASTM D2137).
  • Maximum Continuous Service Temp: +125°C (Intermittent to +150°C).
• Chemical Resistance Profile:
  • Excellent: Polar fluids (water, dilute acids, alkalis, ketones), silicone oils, and greases. Steam up to +120°C.
  • Poor: Hydrocarbon oils (mineral oils, fuels), non-polar solvents. Not for use in direct contact with petroleum-based products.
• Borneo Application Rationale: The high UV index in Kota Kinabalu and Kudat necessitates EPDM's ozone resistance. High humidity in Kuching and Sri Aman requires its low water absorption (<5% by weight).

A1.2 PVC (Polyvinyl Chloride) – Type "P"

• Molecular Structure: An amorphous thermoplastic polymer. Plasticizers are added to achieve flexibility. It is a polar material.
• Key Technical Data (PVC):
  • Density: 1.30 – 1.45 g/cm³.
  • Hardness (Channel): 65 – 80 Shore A.
  • Hardness (Bulb): Typically co-extruded with softer PVC or sponge.
  • Tensile Strength: ≥ 10 MPa.
  • Elongation at Break: ≥ 250%.
  • Maximum Continuous Service Temp: +65°C (higher temps cause plasticizer migration).
• Chemical Resistance Profile:
  • Excellent: Resistance to oils, fats, and petroleum-based hydrocarbons (superior to EPDM in this regard).
  • Good: Resistance to alkalis and dilute acids.
  • Poor: Ketones, esters, aromatic hydrocarbons, and chlorinated solvents.
• Borneo Application Rationale: Suitable for indoor industrial applications in Miri and Kuala Belait where occasional oil contact is possible.

A1.3 Specialty Compounds (Available Upon Request)

• CR (Neoprene): Moderate oil resistance with good weather resistance. Used in specific mining applications.
• NR (Natural Rubber): High tensile strength for abrasive environments, but poor ozone resistance (not for outdoor use).
• Silicone: Extreme high-temperature performance (+200°C+) for oven and engine bay applications.

A2. The Metal Core: Mechanical Reinforcement

The ON2 profile incorporates a formed metal skeleton. This is not a wire; it is a precision-stamped strip.

• Material Grade:
  • Standard: Galvanized Steel (G90/G60 coating) – provides adequate corrosion resistance for general industrial use.
  • Marine/Offshore: Stainless Steel 304 (SS304) – essential for applications in Labuan, Miri Offshore, and Semporna to prevent rust bleed.
• Core Thickness: 0.2mm – 0.4mm, depending on the gripping force required.
• Tooth Configuration: The metal is often perforated or has serrated edges. These teeth bite into the panel surface, increasing the pull-out force by up to 40% compared to a smooth channel.
• Pull-Out Force (Typical): > 50 N per 100mm length (on 2mm steel panel).

 

PART B: MECHANICAL & PHYSICAL SPECIFICATIONS

B1. Dimensional Matrix & Tolerances

The ON2 series is defined by its Gripping Range. The seal must be specified so that the nominal panel thickness falls in the middle of this range.

 

 

Product Code Prefix	Gripping Range (mm)	Channel Internal Width (mm)	Channel Depth (mm)	Top Bulb OD (mm)	Recommended Panel Gauge (SWG/mm)
ON2-102	1.0 – 2.0	2.3 ± 0.15	8 – 10	6, 8, 10	18ga – 14ga (1.2mm – 1.9mm)
ON2-152	1.5 – 2.5	2.8 ± 0.15	10 – 12	8, 10, 12	16ga – 12ga (1.6mm – 2.6mm)
ON2-203	2.0 – 3.0	3.3 ± 0.20	12 – 14	10, 12, 15	14ga – 10ga (1.9mm – 3.0mm)
ON2-304	3.0 – 4.0	4.3 ± 0.20	14 – 16	12, 15, 18	10ga – 7ga (3.0mm – 4.5mm)
ON2-405	4.0 – 5.0	5.3 ± 0.25	16 – 18	15, 18, 20	¼" plate (6.0mm)

*Note: Tolerances per ISO 3302-1 Class E2 for extrusions.*

B2. Bulb Compression Performance

The sealing function is achieved by the compression of the hollow bulb. This creates a Sealing Force (N/mm) .

• Compression Ratio Target: 30% – 40% of free bulb height.
• Closure Force (Typical): 2 – 5 N per 100mm length (at 35% compression). This ensures lids can be closed by hand without mechanical assistance.
• Sealing Pressure: At 35% compression, the bulb exerts approximately 0.2 – 0.5 N/mm² of contact pressure against the mating surface, sufficient to block water ingress up to 0.5 bar.

B3. Environmental & Ingress Protection (IP) Rating

When correctly installed on a flat, clean flange, the ON2 assembly contributes to the overall enclosure rating.

• Water Ingress: With a correctly compressed EPDM bulb, the seal assists in achieving IP54 (splash proof) to IP65 (water jet proof) protection.
• Dust Ingress: The closed-cell structure and constant pressure prevent dust ingress, assisting in achieving IP6X (dust tight) ratings.
• Air Leakage: Typical air leakage rates are < 0.5 m³/h/m at 100 Pa pressure differential.

B4. Tolerances & Installation Parameters

• Flange Edge Condition: Designed for sheared, laser-cut, or stamped edges. Sharp burrs exceeding 0.1mm may damage the inner channel. Deburring is recommended.
• Flange Flatness: The flange should be flat within 1mm over 300mm length to ensure consistent bulb compression.
• Cornering: Minimum bend radius is 5x the profile height. For tighter corners, mitre cutting and adhesive splicing are required.

 

PART C: APPLICATION ENGINEERING – SOLUTIONS FOR BORNEO'S KEY INDUSTRIES

This section provides technical application notes for the primary industries in Sabah, Sarawak, and Brunei.

C1. Oil & Gas: Upstream, Downstream, and Offshore Logistics

The Environment: Salt spray, hydrocarbon exposure, explosive atmospheres (Zone 1/2), high UV.
Key Locations: Miri (Baram Delta) , Bintulu (PetChem) , Kimanis (Sabah Oil Terminal) , Kuala Belait & Seria (Brunei Shell) , Labuan (Offshore Supply Base) .

Application 1.1: Electrical Enclosure Sealing (Ex e & Ex nA)

• Technical Challenge: Must prevent ingress of methane and hydrogen sulfide while maintaining flameproof path integrity.
• ON2 Solution: Use ON2-203 in Flame Retardant EPDM (UL94 V-0 rated). The metal core must be SS304 to prevent corrosion spotting on the enclosure.
• Installation Note: Ensure the top bulb is compressed to the exact height specified in the control drawing to maintain the flame path gap.

Application 1.2: Offshore Container Door Seals (DNV 2.7-1 / EN 12079)

• Technical Challenge: Seals must withstand wave impact, -20°C to +80°C thermal cycling, and 5000+ opening cycles without failure.
• ON2 Solution: Heavy-duty ON2-304 profile with a 15mm bulb. The closed-cell EPDM provides thermal insulation to prevent condensation inside the container.
• Geo-Specific: Mandatory for containers operating from Miri to offshore platforms in the South China Sea.

C2. Marine & Shipbuilding: Commercial and Naval Craft

The Environment: Constant saltwater immersion, high humidity, marine growth.
Key Locations: Kota Kinabalu Shipyard , Sibu (Riverine Vessels) , Labuan Ferry Terminal , Tawau (Fish Processing Boats) , Limbang (Logistics) .

Application 2.1: Watertight Hatches & Doors (SOLAS)

• Technical Challenge: Seals must meet IMO/SOLAS requirements for watertight integrity. Rubber must be fire-retardant and low smoke (IMO FTPC Part 2).
• ON2 Solution: ON2-304 with Low Smoke Zero Halogen (LSZH) EPDM compound. The two internal horns prevent the seal from dislodging during rapid pressure changes (e.g., slamming waves).

Application 2.2: Aluminum Superstructure Panel Joints

• Technical Challenge: Sealing the joints between aluminum panels on high-speed ferries. Dissimilar metal corrosion (galvanic) is a risk.
• ON2 Solution: ON2-152 with SS304 core and EPDM body. The EPDM isolates the aluminum from the steel core, preventing galvanic corrosion.

C3. Heavy Industrial & Manufacturing (SCORE Region)

The Environment: High heat, abrasive dust, chemical exposure (fertilizer, alumina).
Key Locations: Bintulu (Samalaju Industrial Park) , Miri (Lutong Industrial Estate) , Kuching (Demak Laut) , Lahad Datu (Palm Oil Industrial Cluster) .

Application 3.1: MCC (Motor Control Center) Cabinet Sealing

• Technical Challenge: Dust ingress (especially silica dust) into high-voltage switchgear can cause tracking and short circuits.
• ON2 Solution: ON2-203 profile with a high-resilience EPDM sponge bulb. The low compression set ensures the door seals tightly even after years of thermal cycling from the heat generated by the contactors.

Application 3.2: Conveyor System Covers & Hoppers

• Technical Challenge: Preventing fugitive material (dust, pellets) from escaping at cover attachment points.
• ON2 Solution: ON2-304 in abrasion-resistant PVC compound. The rigid channel grips thick steel hopper walls, while the bulb seals against the metal cover, containing dust.

C4. Infrastructure & Construction

The Environment: Tropical rain, UV, high winds.
Key Locations: Bandar Seri Begawan (Brunei) , Kuching (City Center) , Kota Kinabalu (KK) , Bintulu (New Developments) .

Application 4.1: Glazing & Curtain Wall Gaskets

• Technical Challenge: Holding glass or metal panels while allowing for thermal expansion (up to 2mm per meter).
• ON2 Solution: ON2-102 or ON2-152 in UV-stabilized EPDM. The two internal horns grip the framing, while the top bulb seals against the glass, allowing the panel to "float" with expansion and contraction.

Application 4.2: Roof Flashing & Ridge Caps

• Technical Challenge: Sealing the gap between corrugated roof sheets and ridge caps to prevent water ingress during monsoons.
• ON2 Solution: A custom variation of the ON2-304 with a larger, more flexible bulb to conform to the profile of the corrugated sheeting. Installed in Papar and Beaufort to withstand heavy rains.

C5. Agriculture & Plantation Machinery

The Environment: Dust, mud, vibration, fertilizer chemicals.
Key Locations: Kota Belud , Ranau , Tawau , Sandakan.

Application 5.1: Tractor & Harvester Cab Sealing

• Technical Challenge: Keeping dust out of the cabin during dry seasons and keeping the operator dry during harvesting.
• ON2 Solution: ON2-152 or ON2-203 in EPDM. The top bulb ensures a dust-tight seal, while the metal core holds the seal in place despite the constant vibration of the engine and terrain.

Application 5.2: Sprayer Tank Hatches

• Technical Challenge: Sealing the lids of tanks containing liquid fertilizers and pesticides (chemically aggressive).
• ON2 Solution: ON2-203 in EPDM. EPDM has excellent resistance to many agricultural chemicals, preventing seal swelling and degradation.

 

PART D: COMPLIANCE & TESTING DATA

RUBASIA RUBBERTECH ensures all ON2 products meet or exceed these standards:

• ISO 9001:2015: Quality Management Systems (Manufacturing).
• ASTM D2000: Standard Classification System for Rubber Products (Line call-outs available on request).
• SAE J20: Specifications for automotive radiator and heater hose (applicable to EPDM grades).
• UL 94: Tests for Flammability of Plastic Materials (V-0 rating available).
• REACH & RoHS: Compliance for all materials used in European-export applications.
• MS 1024: Malaysian Standard for Rubber Weatherstrips (where applicable).

Testing Services Available:

• Compression Set Testing: Verify long-term sealing force.
• Hardness Verification (Shore A/IRHD).
• Tensile & Elongation Testing.
• Ozone Resistance (Chamber Testing).
• Salt Spray Testing (for SS304 vs. Galvanized validation).

 

PART E: SELECTION GUIDE & TECHNICAL SUPPORT

How to Specify the ON2 Edge Trim:

To ensure you receive the correct profile for your application in Sabah, Sarawak, or Brunei, please provide the following data to our engineering team:

1. Panel Thickness (mm): Measure the actual metal flange thickness (tolerance range).
2. Gap Height (mm): The distance from the panel edge to the closing lid/door (determines bulb height needed).
3. Environment: Outdoor (UV/Rain) or Indoor? Chemical exposure?
4. Material Preference: EPDM, PVC, or specialized (CR/Silicone)?
5. Metal Core: Standard Galvanized or Marine Grade SS304?
6. Quantity: Required length in meters.

 

Contact RUBASIA RUBBERTECH INDUSTRIES:

Our technical sales engineers are located in Kota Kinabalu and cover the entire region.

• For Sabah: We support Kota Kinabalu (KK) , Sandakan , Tawau , Lahad Datu , Keningau , Papar , Beaufort , Kudat , Ranau , Kota Belud , Semporna , Kunak , Telupid , Beluran , Tenom , Tambunan , and all other districts.
• For Sarawak: We support Kuching , Miri , Sibu , Bintulu , Sri Aman , Sarikei , Kapit , Limbang , Lawas , Samarahan , Betong , Mukah , Serian , Simunjan , Lubok Antu , Kota Samarahan , Bau , Lundu , and all other districts.
• For Brunei: We support Bandar Seri Begawan (BSB) , Kuala Belait , Seria , Tutong , Bangar , and all areas.

📞 Request a Technical Datasheet or Quotation Today.
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