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Precision PDMS & Silicone Gel Films, Made to Your Spec

westrufilm is a specialty film manufacturer producing cleanroom-grade PDMS membranes, silicone gel film and silicone elastomer sheets — stocked from 20 µm to 5 mm; thinner grades such as 10 µm and other thicknesses are made to order. Tell us your application; we engineer the film.

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20 µm – 5 mmstock thickness
ISO 10993biocompatible
Cleanroomproduction
Customsize & thickness
Our Facility · Hangzhou, China PDMS gel film production at the westrufilm cleanroom facility in Hangzhou, China
Factory-directManufacturer, not trading co.
CleanroomIn-house production
Live tourVideo call under NDA
Factory-direct supply
ISO 10993 & ROHS
Fast sample & prototyping
Die-cutting / laser cutting
Our Films

Four Core Film Series

Two families — general films (SK / SC / DC), distinguished mainly by hardness and elastic modulus, and surface-tack gel films (SD), distinguished by low / medium / high surface tack. All values are typical.

General · Softest

SK Series

Ultra-soft, low-modulus PDMS film
  • Shore A30
  • Tensile4.0 MPa
  • Elongation220%
  • Modulus0.4 MPa
Best for: microfluidics, flexible substrates
General · Balanced

SC Series

Mid-hardness general PDMS film
  • Shore A42
  • Tensile4.2 MPa
  • Elongation180%
  • Modulus0.6 MPa
Best for: functional & protective films
General · Strongest

DC Series

Highest strength, widest size & thickness range
  • Shore A50
  • Tensile6.5 MPa
  • Elongation120%
  • Modulus1.6 MPa
Best for: dielectric & packaging films
Surface tack

SD Series

Cleanroom PDMS gel film with a tacky surface — T0 / T4 / T6.
  • Surface tackT0 / T4 / T6
  • Thickness80–400 µm
  • TackBoth faces
  • ProductionCleanroom
Best for: die & wafer handling, transfer & positioning
See It In Action

Tested, not just claimed

One continuous take on our own production film — no editing, no stand-ins.

  • Elasticity & resilience — stretched through a frame and released, it returns to shape, again and again. SK series · elongation 220%, elastic modulus 0.4 MPa
  • Heat resistance up to 200 °C — dimensionally stable hot, still flexible down to −45 °C. Verified property · typical value
  • Highly oxygen-permeable, solvent-free — about 596 litres of O2 pass through each m² per day at 50 µm (SK), third-party tested; oxygen-plasma bondable. Test basis: GB/T 1038.1-2022
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Specifications

Standard Film Specifications

Common properties across the SK / SC / DC families. Thicknesses outside the stock range and custom sizes are made to order.

Thickness
20 µm – 5 mm
stock range; 10 µm & others to order
Sheet size
200×150 / 200×300 mm
1.0–5.0 mm grades: 100×100 mm
Roll width
300 mm
up to 500 mm custom
Light transmission
94%
at 2 mm thickness
Oxygen permeability
≈ 596 L/m²·day
SK film, 50 µm · GB/T 1038.1-2022 · Report (2024)QSWJ04149
Operating temperature
−45 ~ 200 ℃
dimensionally stable & flexible
Dielectric strength
20 kV/mm
volume resistivity 10¹⁵ Ω·cm
Refractive index
1.41
density 1.02 g/cm³

Technical data are typical values, not guaranteed specifications. Reference: product specification library.

Applications

Where Our Films Are Used

From the lab to the production line — PDMS films solve permeability, flexibility and biocompatibility challenges.

Microfluidics & Lab-on-chip

Transparent, gas-permeable substrates; oxygen-plasma bondable for chips and assays.

Flexible electronics

Elastic, recoverable base layers for stretchable devices.

Dielectric / EAP layers

High-precision permittivity layer for actuators & sensors.

Gas-permeable membranes

Selective O₂/CO₂ passage, liquid-impermeable barrier.

Medical & biomedical

ISO 10993 tested, biocompatible for devices & dressings.

Die & wafer handling

SD surface-tack gel film for die handling, wafer mounting and 2D material transfer.

Capabilities

What We Can Do For You

Not just a catalog — we manufacture to specification and scale with your project.

01

Cleanroom production

Controlled environment for high-purity, defect-free films.

02

Custom thickness & size

20 µm – 5 mm in stock (10 µm & others to order), sheet or roll, widths up to 500 mm.

03

Precision cutting

Die-cutting and laser cutting to your shape and tolerance.

04

Fast prototyping

Sample lead time measured in days, not weeks.

Quality & Compliance

Certified, Documented, Export-Ready

ISO 10993-5Cytotoxicity
ISO 10993-10Sensitization
ISO 10993-23Skin irritation
SGSRoHS report
Solvent-freeNon-toxic

All films are solvent-free, odorless and physiologically inert. Biocompatibility is verified by ISO 10993-5 cytotoxicity (MTT assay), ISO 10993-10 skin sensitization and ISO 10993-23 in vivo irritation tests, each on saline and cottonseed-oil extracts. RoHS compliance is confirmed by an SGS test report to EU 2015/863. Full reports with report numbers are available on request.

Need a film built to your spec?

Tell us thickness, size, hardness or tack level, and application. We reply with a quote and sample plan within 24 hours.

Email info@westrufilm.com MSDS & Docs