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★ Capability 08 / 08

Rubber &
Silicone Molding.

Compression and injection molded rubber components — NBR, EPDM, FKM, silicone. FDA and USP Class VI compliant.

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★ Elastomer Mold
90 Sh A
Hardness
5kg
Max Wt
35+
Plants
★ Process Overview

Sealing, damping,
protecting.

India has one of the world’s largest rubber industries. Magnus partners with 35+ specialized rubber and silicone molding plants.

Typical output: O-rings, gaskets, oil seals, diaphragms, anti-vibration mounts, grommets, bellows, silicone keypads, food-grade tubing, medical-grade silicone parts.

At a Glance

ProcessesComp / Trans / Injection
Hardness range20 – 90 Shore A
Part weight0.1g – 5 kg
Tolerance±0.05mm
Magnus suppliers35+ plants
★ Technical Specifications

Capability matrix.

ParameterSpecification
Molding processesCompression, transfer, LSR injection, solid silicone injection, rubber-to-metal bonding
Part weight0.1 grams (O-rings) to 5 kilograms (large gaskets)
Hardness range20 Shore A (soft) to 90 Shore A (hard)
Standard elastomersNBR, EPDM, SBR, Natural, Neoprene (CR), Butyl
Specialty gradesFDA, USP Class VI, NSF water, peroxide-cured, conductive, EMI shielding
★ Applications

Where this
delivers value.

Sealing

O-rings, gaskets, oil seals, lip seals.

  • O-rings (all sizes)
  • Static & dynamic gaskets
  • Oil seals (TC, TB)
  • Quad seals & x-rings

Automotive

Engine, transmission, suspension rubber.

  • Engine mounts
  • Bushings & isolators
  • Hose grommets
  • Anti-vibration pads

Medical & Food

FDA, USP Class VI silicone.

  • Silicone tubing
  • Diaphragm pumps
  • Surgical gaskets
  • Beverage seals
★ Materials We Handle

From standard alloys
to specialty grades.

Standard Elastomers

  • NBR (Nitrile)
  • EPDM
  • SBR
  • Natural
  • Neoprene (CR)
  • Butyl

High-Performance

  • FKM (Viton)
  • FFKM (Kalrez)
  • Silicone
  • Fluorosilicone
  • HNBR
  • AFLAS

Specialty

  • FDA food-contact
  • USP Class VI
  • NSF water
  • Peroxide-cured
  • Conductive

Bonding

  • Rubber-to-metal (Chemosil)
  • Rubber-to-plastic over-molding
  • Fabric-reinforced
★ Quality Assurance

Four-stage
quality protocol.

01

Compound In

Rheology test (cure curve), hardness, viscosity, specific gravity verified per batch.

02

Tool Validation

FAI on first cure run: dimensional, flash, bonding, visual standards.

03

In-Process

Cure time / temperature / pressure logged. Hardness, dimensional sampled every shift.

04

Final Test

100% visual on critical parts, AQL on dimensional, tensile, compression set, ageing tests.

★ Frequently Asked

Questions,
answered.

Compression vs injection molding?
Compression: slower, lower tooling cost, ideal for low-volume and very large parts. Injection: fast, high-volume, tighter tolerances — ideal for 50k+ pieces/year.
How to choose elastomer?
Magnus considers operating temperature, chemical exposure, hardness, compression set, regulatory compliance. DFM consultation with material recommendations included.
FKM/Viton suppliers in India?
Yes — multiple suppliers handle FKM (Viton equivalent). Types A, B, F, ETP available with hardness 65-90 Shore A.
India vs China comparison?
India is world’s 3rd largest rubber producer. 8-15% cheaper for NBR/EPDM/natural rubber. Silicone gap narrows to 3-8%.
★ Ready to Source?

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