Windshield Repair Forum

Just wondering what the REAL expected shelf life is of resins? I'm sure I read 1 year, but this seems very short. Delta is now very competive at $50 a oz. However buying a liter drops that price to about $25. Forgive me if my conversions are wrong... aprox 16oz to a liter? If resins can last years than a liter would be the way to go. Iam also wondering what you guys use to put the resin in the injecter? I have been using a glass droper but find the resin hardens in the end and I have to clean it out with my drill. Its not the one that screws on the bottle (it broke). I have tried the one shots but found the UV resentent syrenge ISNT! Used one and the other 4 went hard, guess I should have closed the bag! I see they have a UV reusable syrenge, any one tried it? Do you refill your droper bottles and keep reusing those?
Thanks as always!

jonnyques wrote:However buying a liter drops that price to about $25. Forgive me if my conversions are wrong... aprox 16oz to a liter?

Actually one Liter equals 33.824 ounces, so if you buy a Liter of Premium Bond, you will get at LEAST 3,382 repairs out of it, and it will cost you $11.08 per ounce, or 11 cents per repair.

jonnyques wrote:Just wondering what the REAL expected shelf life is of resins?

Good question. We have done in house testing that shows that our resin continues to be work as designed even 7 years later. These are ongoing tests, but so far that's how long we've gotten with no degrading of the resin.

When we started private labeling our resin for PPG, they required an expiration date, so those expirations dates are 1 year for the Liter, 2 years for the bottles. Look at that more as a warranty, rather than an expiration date. We would replace any resins that are faulty within the warranty period, but that certainly doesn't mean that you should throw them away once they've hit it.

jonnyques wrote:Iam also wondering what you guys use to put the resin in the injecter?

Most of our customers either use the droppers that come with the resin, or the black syringes. Make sure whatever you use though, to clean it. For a black syringe, at the end of the day just pull a little denatured alcohol in it and shake it up, then push it back out. Same with the dropper, just pull a little alcohol, clean, then push out.

jonnyques wrote:I have tried the one shots but found the UV resentent syrenge ISNT!

The one shots are UV resistant, not UV proof. They need to be kept out of the sun, but they would cure in 30 seconds if they were in a regular syringe.

If you are letting your resins set in the end of nozzles etc you should be aware that not only are they setting at the ends but also thickening elsewhere in the container, this makes it harder for you to do repairs.
I suggest you take a lot more care with keeping the away from uv. Work clean and tidy in this job it makes things faster in the long run.

Thanks for the info Jeff!!

I use a regular 3cc syringe and needle that I get at a livestock supply store.About 50cents for the syringecouple bucks for the needles works really well on vertical shields to get resin to the end of injecter.Just run some alchohol through it every time