Silicone Glue Sticks – Are They Safe to Use in Making a Plastic Syringe More Ozone Resistant?

If you read one of my previous posts where I wrote about trying to make a polycarbonate syringe more ozone resistant, you might wonder if this is a safe option.  I don’t have a  concrete answer to that.   Read on and see what you think.

Someone who I highly respect made a comment on my video where I was demonstrating how I attempted to make a plastic syringe more ozone resistant.  She posed some very valid points regarding unwanted chemicals that might be present in some silicone glues.  I also considered the fact that the silicone glue sticks might have more ingredients than silicone alone and wondered if those were safe.

Here is the research I did prior to using a crafts’ silicone gun to cover a syringe’s rubber tip.

These are the silicone glue sticks I have:

Surebonder by FPC – made in the USA

This document includes a safety data sheet plus more info:

http://cdn.dick-blick.com/msds/DBH_SDS_23617XXXX.pdf

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Ingredients in Surebonder silicone glue sticks:

  1. Ethylene Vinyl Copolymer
  2. Resin
  3. Resin Acids and Rosin Acids, Esters with Pentaerythritol
  4. Hydrocarbon Resin
  5. Polyethylene Wax

This is what I found on Kater Silicone’s website (another common silicone glue stick made in China):

http://www.kater-silicones.com/Productsview.asp?id=1195

http://kater-silicones.en.made-in-china.com/product/MvAnXNpYZWkq/China-Silicone-Glue-Stick-with-Transparent-Color.html

Ingredients in Kater silicone glue sticks :

  1. EVA Copolymer
  2. Tackifying Resin
  3. Wax
  4. Oxidation Inhibitor

The main ingredient contained in both brands is EVA (Ethylene Vinyl Acetate Copolymer).  EVA is also known as PEVA (polyethylene-vinyl acetate).   EVA/PEVA is the copolymer of ethylene and vinyl acetate – it is very resistant to ozone.

In conclusion, I really don’t know if silicone glue sticks are 100% safe to use in creating a barrier between a syringe’s rubber tip and ozone.  Though, I liked that the safety data sheet I found for the glue sticks I have did not name any potential health concerns.

Regardless, you might want to do some more research before deciding if this is something you want to try.

Here are some links (click on words) in case you want to read more about silicone glue sticks’ ingredients:

EVA

Rosin acid

Pentaerythritol

Trackifying Resin (aka MQ resins and silicone resins)

Hydrocarbon Resins

Polyethylene Wax

 

That is all for now!

xo,

tere

 

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