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Reaper
04-13-2015, 02:16 AM
Hello, i wanted to get some info on the matter of sponge shrinking.

I just noticed after 2 and a half months of using STIGA Airoc S (7.5 hours per week) the sponge has shrunk 2mm while still being glued on the blade!! I also have been experincing loss of power on blocking (maybe is related to the shrinking sponge ?).

So far this rubber has been all but disappointments (coin size bubble, brittle and unglued rubber edges) and now this. Anyone have the same experience??

In the future am thinking of getting a soft rubber either An Evolution, or something by DHS or XIOM, any of this brands have any of these issues i'm talking about? (don'r recommend Tenergys, my 80FX is also crumbling alarmingly but no shrinkage yet)

Reaper
06-28-2015, 12:48 PM
anyone know if its ok to boost airoc S with baby oil?

dio_hgw
06-28-2015, 01:49 PM
Hi Reaper! Shrinkage plus loss of power that you experience occur due to the fading of the rubbers factory tuning. If I were you I would get a faster rubber than Airoc S and after opening the package I would leave the rubber to "breathe" for some hours before glueing. The other way is to boost your rubbers. Good luck!

UpSideDownCarl
06-28-2015, 02:46 PM
Some of the shrinkage can also be from how the rubber is put on. If it is rolled, that stretches the rubber which is often done when someone puts a rubber on.

But boosting the rubber may help. I have heard that Airoc plays better boosted. I am not sure how baby oil will work for boosting with Airoc.

You could try any of the home boosting chemicals like oil, paraffin lighter fluid, etc or you could get one of the boosters that are designed for it. I think the ones you buy seem to work better than the home remedies these days.


Sent from my iPhone using Tapatalk

Reaper
07-08-2015, 12:26 AM
I just received my TIBHAR evo FX-P and the new DHS Skyline 3-60 soft, can you tell me if these rubbers shrink?
Should i let the rubbers "breathe" for a couple of days?

joseph.luck
07-08-2015, 11:41 AM
Hello, i wanted to get some info on the matter of sponge shrinking.

I just noticed after 2 and a half months of using STIGA Airoc S (7.5 hours per week) the sponge has shrunk 2mm while still being glued on the blade!! I also have been experincing loss of power on blocking (maybe is related to the shrinking sponge ?).

So far this rubber has been all but disappointments (coin size bubble, brittle and unglued rubber edges) and now this. Anyone have the same experience??

In the future am thinking of getting a soft rubber either An Evolution, or something by DHS or XIOM, any of this brands have any of these issues i'm talking about? (don'r recommend Tenergys, my 80FX is also crumbling alarmingly but no shrinkage yet)


I've used Airoc M (both sides) for around 7 weeks now, I haven't noticed any shrinkage but I've noticed a decrease in power. It's actually a pretty slow rubber for their claims 'Power is in the air'.. You need a fast blade to make the most of it. I glued it on without letting it 'breathe' and rolled the rubber onto the blade, perhaps that's why. Anyway, I doubt I'll buy Airoc again.

Der_Echte
07-09-2015, 02:59 AM
I've used 5 sheets of FX-P and none of them shrank... ever. Had that happen with T05 when I used it and WIDE edge tape slowed it down a lot.

Reaper
07-09-2015, 05:33 PM
Well, I let the Skyline 3-60 open for a day to see how it behaves... out of the package is flat, the next day it had domed a bit so its sponge shrank a bit, i glued it and cut it ±1.5mm bigger just in case.

I'll do the same with FX-P when the time comes just to be sure

In the case of the Airoc S that i mentioned earlier, gave it 3 layers of baby oil which flattened and reversed its dome, and expanded it about 1mm but not to its previous size... I'll test these on the weekend

raazzz
07-09-2015, 11:39 PM
I have not noticed any shrinkage on my Airocs M, and yes they play better boosted in my opinion.

Olio
07-10-2015, 10:12 AM
The only XIOM I know that shrinks a bit is Vega Japan.

Other Vega and OMEGA IV do not shrink.

As I am used to glueing rubbers, and I know not to stretch them, the sole reason for shrinking is loss of booster. You can then either avoid it by buying the right rubbers, or live with it (and counter it with a bit of booster to return the rubber to how it should be. Now is that illegal? in my opinion it's not, but some will disagree)

dio_hgw
07-11-2015, 07:32 AM
Perhaps another logical way to control rubber shrinkage is to glue the rubber without letting it "breathe", but cut it ~2mm wider than the head of the blade. After a few days you will know if shrinkage occured and then you can adjust again the rubber to the blade dimensions. I will try it myself next time I change rubbers...

Reaper
07-11-2015, 04:13 PM
yep that's what I will do, since I'm still new using Pro equipment I didn't think of that.
I had to learn this tricks the hard way :(

Reaper
07-20-2016, 01:39 AM
I brought the thread back cause i didn't want to create a similar topic.

Anyway, after using my Tibhar FX-P for 6 months, now it has shrunk ±1.5mm vertically and horizontally, leaving the blade edge exposed and a gap at the bottom :(. Fortunately i use edge tape to minimize the chance of breaking balls when hitting them with the blade's edge.

I was waiting for the new FX-S/EL-S but I think i'll now move on to Xiom Vega because of the lower price. I already know the Vega Elite shrinks fast cause i saw it in a friend's blade... So, any other Vega model shrinks so i can avoid it? What about the Omega V models?

Olio
07-21-2016, 02:27 PM
Vega Pro / Asia do not shrink (Japan does). Omega V does not either.

NextLevel
07-21-2016, 05:45 PM
What do you glue with?

Tony's Table Tennis
07-23-2016, 10:31 AM
From what I read in the opening post - it is likely more user error than anything else

And reading again, it is indeed user error lol

Firstly, all tensor rubbers (or most) are easy to stretch when gluing on - so do not add pressure, else you will stretch it
Secondly, softer sponges are easier to stretch - hence bigger chance of shrink.
Thirdly, make sure the glue is totally dry, as wet sponge tend to stretch easier

Now and then the shrink could be due to the factory tune too, but that ratio is really low

Tony's Table Tennis
07-23-2016, 10:35 AM
Vega Pro / Asia do not shrink (Japan does). Omega V does not either.

Not true, I can make it stretch a lot, and it will shrink eventually

Reaper
07-23-2016, 02:46 PM
Not true, I can make it stretch a lot, and it will shrink eventually

Are you talking about the Vegas or the omegas?


I don't like to stretch or press down hard the rubber while i'm gluing cause it may behave different than expected.

I know high quality rubber shrink, but my airoc S and FX-P shrunk way too much. My Tenergy 80FX also shrunk but it was manageable.

Olio
07-24-2016, 08:19 AM
Not true, I can make it stretch a lot, and it will shrink eventually

Me too, but you know that's not what I meant. I meant from factory boosters drying up.

jknakatani
07-27-2016, 07:54 PM
Hello, i wanted to get some info on the matter of sponge shrinking.

I just noticed after 2 and a half months of using STIGA Airoc S (7.5 hours per week) the sponge has shrunk 2mm while still being glued on the blade!! I also have been experincing loss of power on blocking (maybe is related to the shrinking sponge ?).

So far this rubber has been all but disappointments (coin size bubble, brittle and unglued rubber edges) and now this. Anyone have the same experience??

In the future am thinking of getting a soft rubber either An Evolution, or something by DHS or XIOM, any of this brands have any of these issues i'm talking about? (don'r recommend Tenergys, my 80FX is also crumbling alarmingly but no shrinkage yet)

All the rubber that I have used (Tenergy, Vega, Omega, Bluefire, Barracuda, Gewo, Cornilleau Target Pro) have shrunk as I remove them from the blade. Never occured while still glued. A friend of mine recommend to spread 1 layer of glue on the sponge, let it dry for 1 week and then spread another layer and as soon it got dried, put it on the blade. Maybe it will help you.

It is important to notice that the rubber do expand in high temperatures. Try to be sure that it is not the case.

All the best.

fais
07-27-2016, 11:01 PM
As the self professed king of baby oil boosters, I can say this much. The baby oil treatment is more of a physical treatment rather than chemical treatment as is my understanding. Someone correct me if I'm wrong, but my assumption with paraffin oil is: the release of voc gasses resulting from the chemical reaction (caused when the PO, glue and sponge come into contact) permeates the sponge and causes it to expand and stretch(kind of like a balloon). However, the gasses escape eventually, the sponge returns back to its original size, but the sponge has been lightly damaged/dried out by the PO. After enough PO boost treatments, the sponge becomes unplayable. I believe (and I may be wrong) this is why PO boosting shortens the life of your rubber, but the results are great.

With baby oil, it has been my experience, that the oil itself is absorbed by the sponge, causing it to expand permenantly, and while there is an initial release of gases, it is the absorption of oil and not the absorption of gases that boosts the sponge. I'm incline to thing so, because in my experience rubbers boosted with baby oil never shrink back (and I have a few that stretch way to much and won't undome and stick to a paddle). While the performance is not as great as PO (or so i've heard), it is markedly better than without the BO treatment, in fact I have a H3 neo I've had on my paddle for nearly 3 years that is still tacky and still extremely lively that I don't need to replace!!!!!

BlackRed
02-05-2018, 06:30 AM
I have shrinked ELS dan FSX both together.. Used them since Mid 2017, every month I re-glued both sponges.. They shrink bit by bit each month.. Until last January, they shrinked about 3 mm from all sides (top, sides, below).. I Used Water Based Glue, use only hand not roller to attach the rubber.. Last Time I tried to rolled stretch the rubber, well, both reached the top side, but not the sides, it left the sides open..

This time I try T05 and T80, hopefully no shrinking.. Water based glue, attached by hand.. My previous tenergy(s) 05 shrunk..

Lightzy
02-05-2018, 09:55 AM
Very soft sponged rubbers tend to shrink *on the blade* if not glued solidly.
Glue them properly and if you're unsure, cut them with flaps overlapping the blade to make sure. If it shrinks then fine, you still have it covering the blade. If not, cut the flaps (if you want) :)
This is more of a problem if the climate is extreme and your rackets undergo temp changes (best to keep in some case that's at least somewhat climate resistant). Soft sponges like that are delicate.

Don't boost soft rubbers, it will not help. It will just ruin them.