Humidity % for glassing

RoomToMove · #1 11-03-2018, 11:10 AM

Can anyone recommend how much humidity is too much humidity. I have heard around 70% humidity is the threshold. Can anyone comment on this?

DonV · #2 11-03-2018, 05:30 PM

I don't think I would be too much help on this question, where I live 70% humidity is a very nice low humidity day. I'm used to 90 degrees and 90% humidity most of the year.

NoBones · #3 11-03-2018, 08:09 PM

Fer us cracka's in Florada, 11 CC of MEK per quart is da norm...
Ifin' yoube high on humidity make it a little hotter on da mix...

Do nots be glassin' in da rain ! Sunshine good.

Bump your mix a couple o notches like 2-3 more CC's if you wet in the air !

Later..

RoomToMove · #4 11-03-2018, 08:45 PM

Thanks fellas. I figured you Florida guys would have some good advice. We'll be getting a little glassing done tomorrow should be around 60%.

How about temp? Do you need to be above 50 degrees for a proper cure or just add some more CC's if its cold?

Cheers

NoBones · #5 11-03-2018, 09:32 PM

Just make sure you wheel her in the sun when done....
A couple of notches up on the MEK shorten's your work time,
but you want it to kick for sure....

Try a little test area before you go full bore !!

FLexpat · #6 11-04-2018, 10:38 AM

I have found that in high humidity peel ply on the surface eliminates surface tackiness with VE and blush with epoxy - I have had success with it up to near 100%. I would not try to use it outside in the rain or condensing fog though - sometimes you just have to stop.
It also leaves a great finish for future bonds. You can leave it in place to protect the surface until you are ready to do something to that surface but I have to admit I usually pull it off to see how things look then regret pulling it off.
If you go that way, remember that the peel ply absorbs a little bit of resin so account for that.