leash box, dont dry (epoxy) help needed

General Discussion
1

 I have finished to glass the board a week ago, and I am on my second attempt to instal the leash cups. the first time the epoxy wouldnt dry, guess i add to much pigment. now second time i reduced on the pigment and looked fine, 16 hours after when i started to sand the hot coat, when i geo to the leash cups and started to sand  the resin is still lumpy, and the leash cup is still lightly moving and is like being pushed out by the resin. Can anyone help.?

should i allow some more time?

should i put it in the sun and then inside the garage ?

should i have mixed a little Hollow glass microsphere or something like that when instaling the fins?

should i use  epoxi 5 minutes “glue”?

 

 

2

What Epoxy are you using. Which hardner are you using? (Fast, Slow etc.)?   Are you measuring the resin and hardner to the correct ratio?  Part A to Part B??  2 > 1, 4 > 1 ??  I use a little white pigment and ground fiber(1/32).

3

measuring is 2 of epoxy to 1 of hardner. I am using catalyst. 

the epoxy resine type is Cronopox 1321-same type as I used during lam

th catalyst-Cronopox 1156-same type as I used during lam

is a company in spain, you may not find any reference on it. 

Any ideas what am I doing wrong, should i wait longer and pply some weigh in it so does not come out?

 should remove the cup and do it with epoxi 5 min or  do it with mix plus adding Hollow glass?

?

 

4

you might still have uncured resin left in the hole from the 1st attempt?

your ratio might be off (it is hard to measure small amounts unless doing it by weight)?

measuring is 2 of epoxy to 1 of hardner. **I am using catalyst. **this sounds suspect…

5

Try to contact Cronopox and discuss your problem.

6

Catalizador para epoxi. Cronopox 1156

www.tiendaonlineplastiform.es

Catalizador para resina epoxi. Dosificación: 1 parte de catalizador por 2 partes de resina Cronopox 1321

Hola Earthling-

Looks like the word for  'Catalizador ’ is ‘hardener’. In English ‘catalyst’ is usually used for the chemical MEKP used 1-2% for polyester resins, the kind that melts EPS.

Is the blank EPS foam or PU foam?

-Contacting the manufacturer is best idea, especially when adding stuff or having problems.

-Yes to microspheres

-No to 5 minute epoxy if EPS blank

-Pigment amount only 1-3% of mixed epoxy

-Make sure holes are not too big: too big hole=too much epoxy=too much heat=melt EPS foam=weak joint

Let us know what you do to make it work.

 

7

Sorry if my spanish is bad…

La palabra catalizador es muy similar a la palabra en ingles “catalyst,” que es un palabra por MEKP, alguno diferente de “hardener.” Pero pienso que la palabra espanol ‘catalizador’ significa la misma de la palabra ingles “hardener” y no significa MEKP. Es posible por que haces un cantidad pequino de epoxy la proporcion no es 2:1.

So I think jrandy is right about the language issue here, in that their word for hardener is like our word for catalyst. Perhaps the mix ratio is off since it’s a small quantity? That’s what I’d suspect but I’m no expert. I may or may not have said all that in spanish. I tried. 

 

8

As you said;  use the five minute Epoxy.  After you put the plug in the hole, put a zip- lock bag of Ice on top of it to prevent Exo-therm.(melting of foam)

9

Or you could… Mix the resin clear no pigment, leave a little low, when it gels mix a little more with pigment, and top off. 

10

grasshopper- Thanks! I have aimed to removed most/all of the lump uncured resin on the first atempt. I think you are completely right ratio might be off, Smal measure are hard to get them right. catalyst i meant hardener . 

jrandy- Thanks! Yes i think  you right on the translation  i meant to say hardener. The foam I am using is EPS foam. i will use going forward the microspheres. I think you also right the hole is to big and could have melted some of the foam and not helping the joint. 

McDing-Thanks! ** **my fear is that the 5 minutes epoxy can have some weird reacton with EPS.

Huck-Thanks! That could be a good approach,

 

**possibly route cause-  **messed up with the meassures on the mix, the holes size, did not clean up the hole well in the first attempt.

**take aways-  **next time make sure- the holle is smaller, get the meassure right -use a scale, use some microspheres. if no microspheres add resin progressivly Mix the resin clear no pigment, leave a little low, when it gels mix a little more with pigment, and top off.

 

**Update-**Last night i left some books on the toop of the cup so the resin would not push te cup out, and today looked flat and dryed outside, may not be inside thought.

how can i resolve this now-

Should i remove it and start all over?  what would be the best to clean that gummy pumpy stuff out?

should I just leave it since looks ok outside ?

what can i do with the big hole now?

can i use the 5 minutes epoxy in EPS foam?

 

11

All the guys have good advice and the Dr. has some Espan-yol.

I would take some scrap foam from your blank and test your new method first. Drill a hole, epoxy in a piece of wood, cork, bottle cap, about the same size as the plug, let it cure and cut it apart the next day and check for good cure and EPS melting.

I use a small scale for small batches of epoxy, even with 5 minute (unless the 5 minute is in a double syringe package). There are other small amount measuring tools too: beaker, pipette, syringe.

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12

Yes iam getting some good advices, Iam a lucky person to have you all around!!!

 I will test it, i just got myself a scale to avoid some issues related to measures. 

Are you saying, you use 5 minutes in EPS ? does it work?

thanks

13

so i went ahead and bought the epoxy 30 minutes dry. I have removed the lumpy leash box, cleaned well cleanned and applyed the epoxy 30 minutes, i have put a xip bag of ice in the bottom as i felt the it getting warmed. So far so good it worked fine!!

i also got a scale, so now i will always make sure i measure it twice before applying it.

thank you all for the advices

14

Cool!  Glad that it worked out for you my brother.  Lowel