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Round Internal Rubber Cap | RUBASIA RUBBERTECH INDUSTRIES

The Largest Manufacturer | The Best Quality | The Widest Range | The Market Leader in Borneo (Sabah, Sarawak, Brunei)

RUBASIA RUBBERTECH INDUSTRIES is The Largest Manufacturer and Market Leader of Round Internal Rubber Caps in Borneo, supplying high-performance, precision-engineered rubber caps to industrial, commercial, and furniture manufacturers across Sabah, Sarawak, and Brunei.

Our Round Internal Rubber Caps are designed for internal insertion into metal or plastic tubes, providing airtight sealing, vibration damping, and edge protection. Made from premium-grade natural or synthetic rubber compounds, these caps are ideal for furniture legs, steel structures, tubing assemblies, automotive frames, hospital equipment, and marine components.

Available in multiple sizes — 19mm, 22mm, 25mm, 32mm, 38mm, and 51mm — RUBASIA RUBBERTECH ensures The Widest Range to fit various inner diameters, ensuring maximum compatibility and durability.

 

Technical Specifications

Parameter	Specification
Product Name	Round Internal Rubber Cap
Brand	RUBASIA RUBBERTECH INDUSTRIES
Type	Internal Plug-Type Rubber Cap
Sizes Available	19mm, 22mm, 25mm, 32mm, 38mm, 51mm
Material Options	NR (Natural Rubber), EPDM, NBR (Nitrile Rubber), Neoprene, Silicone
Hardness (Shore A)	60 ± 5
Tensile Strength	≥ 12 MPa
Elongation at Break	≥ 400%
Compression Set	≤ 25% (22h @ 70°C)
Temperature Resistance	-40°C to +120°C (depending on compound)
Color Options	Standard black (custom colors available upon request)
Design	Tapered internal ribs for friction-lock fit
Finish	Smooth matte finish with sealed top surface
Installation Type	Push-fit internal insertion

Product Engineering and Design Features

• 🔹 Internal Ribbed Structure: Each rubber cap features concentric internal ribs to ensure tight frictional grip against the inner tube wall, preventing dislodgement even under dynamic vibration or movement.
• 🔹 Reinforced Dome Head: The solid top section offers superior impact absorption and protection against deformation from vertical loads.
• 🔹 Precision Moulded Edge: Smooth edge transition eliminates scratching or scoring on inner tube surfaces.
• 🔹 Flexible Taper Geometry: Engineered taper ensures universal fitting tolerance for ±0.5mm variations in internal tube diameter.
• 🔹 Weatherproof Material: EPDM and Neoprene variants resist ozone, UV exposure, acid rain, saltwater corrosion, and tropical humidity typical in Borneo’s coastal and inland climates.
• 🔹 Non-slip Base Contact: Provides grip on floors when used for furniture legs, enhancing anti-slip performance.

 

Functional Advantages

1. Floor and Surface Protection – Prevents damage to tiles, vinyl, or wood flooring.
2. Noise Suppression – Absorbs impact sound when furniture is moved.
3. Edge Sealing and Debris Protection – Prevents dirt, water, or insects from entering tube interiors.
4. Aesthetic Enhancement – Provides a professional and finished look for open tubes.
5. Corrosion Prevention – Seals steel tube interiors against moisture ingress.
6. Shock and Vibration Damping – Reduces mechanical vibration in equipment frames and assemblies.
7. Safety Enhancement – Covers sharp-edged openings, reducing risk of cuts or injury.
8. Air and Dust Tightness – Ensures clean internal environment for medical, lab, and food equipment.

 

Applications Across Industries

RUBASIA RUBBERTECH’s Round Internal Rubber Caps are trusted in multiple industries throughout Sabah, Sarawak, and Brunei, including:

• Furniture Manufacturing: Chairs, tables, office furniture, racks, stools.
• Construction & Engineering: Scaffolding tubes, railing ends, temporary structures.
• Automotive & Transportation: Frame tubing, body supports, vibration absorbers.
• Marine & Offshore: Corrosion-resistant sealing for stainless and mild steel pipes.
• Medical & Laboratory Equipment: Sanitary sealing, anti-slip footing.
• Food & Beverage Equipment: Hygienic end covers for process tubes.
• Electrical & Mechanical Workshops: Protective caps for spare parts, shafts, and fittings.

 

Installation Method – Step-by-Step Guide

1. Preparation:
   • Clean the inside of the tube or opening using a dry cloth or compressed air.
   • Remove oil, rust, or debris to ensure clean contact.
2. Fit Alignment:
   • Match the correct internal diameter of the cap with the tube measurement.
   • Ensure proper sizing from 19mm to 51mm as per application.
3. Insertion:
   • Hold the cap perpendicular to the tube opening.
   • Press the cap into the tube until it sits flush with the edge.
4. Adjustment for Tight Fit:
   • For an extra-snug fit, warm the cap in hot water (~60°C) for 1–2 minutes to soften before inserting.
5. Inspection:
   • Check that the cap sits evenly and does not protrude unevenly.
   • Tap lightly with a rubber mallet if necessary.

 

Geographical Coverage and Supply Network

RUBASIA RUBBERTECH INDUSTRIES proudly serves every major and small town across Borneo:

Sabah: Kota Kinabalu, Sandakan, Tawau, Lahad Datu, Semporna, Keningau, Tenom, Beaufort, Papar, Kudat, Ranau, Kota Belud, Sipitang, Tambunan, Kunak, Tuaran, Penampang, Nabawan, Pitas, Kota Marudu.

Sarawak: Kuching, Miri, Sibu, Bintulu, Limbang, Kapit, Sarikei, Betong, Sri Aman, Mukah, Bau, Marudi, Lawas, Serian, Lundu, Simunjan, Samarahan, Siburan, Belaga.

Brunei: Bandar Seri Begawan, Kuala Belait, Seria, Tutong, Bangar, Lumut.

 

Why Choose RUBASIA RUBBERTECH INDUSTRIES

✅ The Best Rubber Cap Manufacturer in Borneo
✅ The Largest Production Capacity for industrial-grade rubber fittings
✅ The Widest Range of Sizes – 19mm to 51mm
✅ The Highest Quality Rubber Compounds (NR, NBR, EPDM, Neoprene)
✅ The Biggest Supplier Network covering all Borneo towns
✅ Market Leader in Rubber Sealing, Protection, and Finishing Products
✅ ISO-compliant Production Process ensuring consistent performance and dimensional accuracy