how thick the fiberglass?

[CarMan]

i have betven 15-20 degreas celcius in the garage.

the first 5 layers did i lay last week, so i thik they are totaly harded.

[apex1]

Originally Posted by CarMan

i have betven 15-20 degreas celcius in the garage.

the first 5 layers did i lay last week, so i thik they are totaly harded.

Go above 25°C for min. 4 hours, higher temp. is even better.

At these low temperatures it can happen, that the resin does not completely cure in 3 month! Or sometimes never!
Come on spend some 67 kroner on energy.

Regards
Richard

[CarMan]

i will son do the doors in the swimplatform, then i will heat upp the garage for thet work and the swimplatform is still ther.

[apex1]

Sounds good.

25°C min.
4 hrs. min.
more is
better

[CarMan]

Thenks for all help so far!

One spot on the surfas looks like this, what wnet wrong here?

(i want to learn, so i dont do same mystake next time)

I can not attach the picture, i will tray later....

[CarMan]

now it works!

[apex1]

Read from my lips:

T E M P E R A T U R E ........................

[CarMan]

Do i get this gelcoat kraks if the tempratur is to low, when the gelcoat sets?
ore is it when the first layer of plastick sets?

[apex1]

I would have to ask at the yard, but I am not going there anymore this year.

Maybe Herman will answer this!? I gave him a PM

Regards
Richard

[Herman]

and there he is...

This phenomenon is called "alligatoring" or "elephant skin".

It is caused by the first layer of gelcoat not being cured properly. This can be caused by:

-temperature
-under catalisation (too little MEKP added. Check the datasheets, usually 2%)
-improper mixing
-too little cobalt added (should not be the problem, in non-tropical countries cobalt is added to gelcoats as standard)

As soon as the second layer (gelcoat or laminate) hits the first layer, the first layer cannot cope with the high styrene levels and starts to "live" causing these wrinkles.

Nothing to really worry about, but it does give you some nice hours of refairing and painting...

[apex1]

Thank you Herman!

So, our Swedish friend, go up with the temp, as I said several times now!

Regards
Richard

[CarMan]

Thenks!!!

[CarMan]

I need "doors" to my swimplatform.

[CarMan]

I will soon go out in the garage and see if i get it out of the mold.

[CarMan]

Now the children is in bed, and i hawe sow the edge and then get it out of the mold. Nise and smoth !

no damage in the gelcoat at all.

i ust 2 layers of gelcoat, 5 layers of glasfiber 20mm bonucell 3 layers of glasfiber