Multi-Material Overmolded Gasket

Name: Multi-Material Overmolded Gasket
Brand: Churub Rubber
SKU: PROD-013

Multi-material overmolded gasket, LSR + solid silicone, composite molding, leak-free

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Description

This advanced gasket utilizes our solid-to-liquid composite process to bond different silicone formulations in a single molding cycle. For example, a soft LSR sealing lip can be overmolded onto a harder solid silicone base, providing both flexibility and structural support. This eliminates the need for secondary assembly and ensures leak-free performance. Suitable for complex geometries and multi-function sealing applications in automotive and industrial markets.

Specifications

Material	LSR + Solid Silicone
Hardness	40/70±5
Operating Temperature	-50°C to 230°C
Color	Black / Red / Custom
Certifications	ISO 9001
MOQ	1500
Lead Time	25 days (after approval)
Customization	Drawing or sample based, full dimensional report provided

Engineering & Quality Documentation

📋 Technical Standards

ISO 9001-aligned manufacturing
Custom durometer combinations (30-80 Shore A) documented
FDA / LFGB grades available for food-zone duty
Service range -50 °C to +230 °C

🏭 Manufacturing Process

Solid-to-liquid composite molding: hard solid silicone base and soft LSR sealing lip bonded in a single molding cycle — no secondary assembly.

Durometer transition zones engineered per sealing requirement
Eliminates glued joints and their failure mode
Post-cure stabilizes both material phases

🔍 Quality Inspection

▸ 100% visual inspection before packing (flash, short-shot, contamination)
▸ Dimensional verification against approved drawing; FAI report on first shipment
▸ Hardness per ASTM D2240 (Shore A) on every batch
▸ Lot traceability: material batch and cure records logged per carton
▸ Durometer verification at each material zone per lot
▸ Bond zone integrity sampling (peel/tear)
▸ Dimensional FAI including lip geometry