Question for the chemists

toe72 · 13 September 2014, 01:29

So my older zodiac was fine and clean. Even put 303 protectant on it. I decided to cover it and it turned red!? (From gray) ... It had happened before and usually goes back to original color after a couple of days... What is going on?

Poly · 13 September 2014, 07:37

do you have any pictures?

Peter_C · 13 September 2014, 07:46

Mold?

toe72 · 13 September 2014, 11:02

Here a an ugly pic... Will monitor as using today and tomorrow...see if goes away

toe72 · 13 September 2014, 11:09

Here a an ugly pic... Will monitor as using today and tomorrow...see if goes away

Bigmuz7 · 13 September 2014, 11:45

I have noticed in certain conditions, if the material on my tubes gets warm and some water gets splashed on it, it will discolour (usually goes lighter) until the water has dried off and then the original colour returns, ive never got to the botom of why it is, but, because its not permanant, never found the need to ? .. there must be some superficial absorption going on

Poly · 13 September 2014, 12:02

I assume your cover is not red (or reddish) ?

It looks to me like bacteria/mould - surprised its so bad but if its had just the right conditions (warm, damp etc) then its plausible.

Landlockedpirate · 13 September 2014, 12:29

It looks like the boat has had some sun damage at a point in its life, the protectorant you have been using may have masked the problem.

Over time and in the moist warm atmosphere under the cover the damage becomes visable again.

Just a guess ?

toe72 · 13 September 2014, 12:51

For sure the tubes are very sundamaged --on their last days

cgoing · 13 September 2014, 17:01

What model and year is the boat? Looks like a Pro 650???

cgoing · 13 September 2014, 17:01

Where is the boat ??

Boatnomad · 13 September 2014, 18:42

Was it ever upside-down?

Ribochet · 13 September 2014, 19:22

When certain polymers such as PVC are exposed to UV radiation the polymer molecules on the surface are converted to a complex structure made up of polyenes and this can result in a brownish discoloration often called UV discoloration which should disappear when exposure ends

What you describe is the opposite unless the cover somehow removes a surface coating exposing the above UV degradation

toe72 · 13 September 2014, 23:37

Thats a good eye! 2001 650 open pro... Great boat. We've really enjoyed it.

toe72 · 13 September 2014, 23:39

Montreal, qc... Never upside down as far as i know