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Can I use West System 404 High-Density Filler with 3M Resin?
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Author:  jmecky [ Wed Mar 21, 2012 5:22 pm ]
Post subject:  Can I use West System 404 High-Density Filler with 3M Resin?
Can I use West System 404 High-Density Filler with 3M Resin?

I already mixed it and used it to patch a small hole before I spray some gel coat.
The problem its taking a long time to set, will it set it my real question.
Of course I used hardener and prepped with 80 grit and compressed air.

Please tell me this will work!

JD
Author:  MBounds [ Wed Mar 21, 2012 7:13 pm ]
Post subject:  Re: Can I use West System 404 High-Density Filler with 3M Re
The filler shouldn't have any effect on the cure rate of the resin. It's just calcium metasilicate and silicon dioxide - both are realtively inert.

Shine an incandescent lamp on it for a couple of hours, or leave it in the sun.
Author:  jmecky [ Thu Mar 22, 2012 7:35 am ]
Post subject:  Re: Can I use West System 404 High-Density Filler with 3M Re
MBounds wrote:
The filler shouldn't have any effect on the cure rate of the resin. It's just calcium metasilicate and silicon dioxide - both are realtively inert.

Shine an incandescent lamp on it for a couple of hours, or leave it in the sun.



Thanks, after I read your post I relaxed. I was about to scrape it off and sand the rest out and start over. It is just taking a while to set I only added 8 drops of hardener for about 1.5 - 2 oz of resin and enough 404 to turn it into mayonnaise. The resin recommends 10 drops per ounce. I felt it this morning and it had set.

I heard that adding less hardener makes the resin stronger overall even though it takes longer to set? This is not why I added 8 drops, the 8 drops was a goof.
Author:  srm [ Thu Mar 22, 2012 9:33 am ]
Post subject:  Re: Can I use West System 404 High-Density Filler with 3M Re
4 to 6 drops of hardener per oz of resin is probably not enough. I usually use at least 10 to 12 drops per oz...but I'm also not a very patient person.

http://uscomposites.com/pdf/MEKPDirections.pdf

sm
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