What is the difference between peroxide and platinum silicone?

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Peroxide and platinum are used in the manufacturing and curing processes of silicone tubing. Both are catalysts that help convert
silicone elastomer into tubing. The two types are naturally flexible and do not require the use of leachable plasticizers. Peroxide
silicone tubing, which tends to be less costly, must be heated after the extrusion process to remove the catalyst; platinum needs
no post-extrusion heating. Platinum-cured silicone tubing offers a smoother surface that resists sticking, encrustation, and bacteria
growth.

Here are is a list of the different types that we offer.

Platinum Cured
Silcon® Med-X
Tygon® 3370 I.B. (braid reinforced)
Tygon® 3350 Sanitary

Peroxide Cured
Silcon®
Silbrade ® (braid reinforced)
Versilic™ SPX-50 High Strength

Physical Properties

	Silcon®	Silbrade®	Silcon® Med-X	Tygon® 3350	Tygon® 3370 I.B.	Versilic™ SPX-50
Durometer Hardness Shore A	50 ± 5	70 ± 5 Core 60 ± 5 Cover	50 ± 5	50	70	50
Tensile Strength, psi	1100	1000	1100	1450	1200	1500
Elongation at Break, %	375	350	650	770	500	450
Compression Set	22 hrs @ 177°F 35%	N/A	22 hrs @ 177°F 35%	22 hrs @158°F 7%	22 hrs @158°F 3%	22 hrs @158°F 10%
Tear Resistance, Die B ppi	100		200	200	250	148
Brittleness Temp °F	-100	-80	-100	-112	-112	-112
Max Operating Temp °F	500	350	400	400	320	350 continuous 400 intermittent
Food , Beverage, & Medical use	Made of FDA sanctioned ingredients & NSF51 certified	Made of FDA-sanctioned ingredients & NSF51 certified	USP class VI	3-A, FDA 21 CFR 177.2600, FDA GP-95 & NSF 51	USP class VI, 3-A & FDA 21 CFR 177.2600	USP class VI, 3-A, FDA 21 CFR177.2600 & NSF 51

Fitting selection - Care is recommended in the selection of fittings and clamps for silicone tubing as sharp barbed fittings or unlined
metal clamps could tear into the tubing wall and possibly cause a failure.

Sterilizing – Silicone can be steam sterilized in-line, or autoclaved at up to 250°F in a normal autoclave cycle. However, if exposed
to repeated stem sterilization or long term high temperature or pressure, silicone will eventually relax and become gummy. It should
then be replaced.

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Title: What is the difference between peroxide and platinum silicone?
Description: Overview of the silicone tubing products that we offer.
Published: 11/2/2010
Last Edited: 9/19/2013

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