Gas Permeable PDMS Tube

PDMS Tubes are similar to the PDMS Membranes Limitless Shielding supplies, just in tube form. These tubes are ideal for peristaltic pumps, boasting an extended life for this application. 

Our platinum cured silicone tube is FDA and BfFR compliant, with full WRAS approval for hot and cold water. NSF approved tubing is also available by special order. The PDMS membrane tubes are odour free, and produced using a platinum cure catalyst system. They are available in lengths from 1m up to 25m.

PDMS tube is available from 1.2mmOD x 0.5mmID up to 31mmOD x 25mmID.

For many common gases, PDMS is 30 times more stable than non-silicone stable polymers. Applications include gas analysis, gas detection, gas enrichment, gas separation, and cell growth support. Download the data sheet below for technical specifications such as gas permeability rates for oxygen, carbon dioxide, nitrogen, and hydrogen. MSDS information is also available.

PDMS membranes are also available in 20µm, 50µm, 100µm, 200µm, 250µm, 300µm, 400µm, 500µm, 600µm, 800µm, 1600µm, 3200µm Thicknesses


Technical Information

Dielectric strength-80 - 100 kV/mm-
Volume resistivity-10¹⁴ OhmcmIEC 60093
Hardness Shore A-27°DIN ISO 48-4
Tensile strength-6.0 N/mm²ISO 37 type 1
Elongation at break-450 %ISO 37 type 1
Compression Set22 h | 100 °C5 %DIN ISO 815-1 type B method A
Gas permeability (selectively)-CO₂/N₂ = 10:1 DIN 53536
Water vapour permeability24 h | 20 µm3000 g/m²JIS 1099 A1
Water vapour permeability24 h | 50 µm1200 g/m²JIS 1099 A1
Water vapour permeability24 h | 100 µm800 g/m²JIS 1099 A1
Glass transition temperature--126 °C-
Operating temperature--45 - 150 °C-
Tear strength-10 N/mmASTM D 624 B
Gas Permeability Rates*ApplicationsMembrane Thickness
Oxygen50Gas Analysis0.125mm(0.005″)0.15mm(0.006″)
Carbon Dioxide270Gas Detection0.15mm(0.006″)0.2mm(0.008″)
Nitrogen25Gas Enrichment0.25mm(0.010″)0.3mm(0.012″)
Hydrogen55Gas Separation0.35mm(0.014″)0.43mm(0.017″)
  Cell Growth support0.6mm(0.024″)1.0mm(0.040″)
*In barrers 10-9 (cc gas(RTP)cm)/(sec cmcmHg ΔP)

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