Another enclosure, pics inside

Here we go again, here's my 4th enclosure.  In pic 5 you will notice I cut out a section in the rear to apply my mixture of resin/cabosil expander to stiffen up the box from the inside.  The is for my hoopty/beater rear drivers' side corner.   Questions/comments are welcomed!     8D

Pic 1 - Mold inside car
Pic 2 - Mold shape w/cut edges
Pic 3 - Mold with mdf ring
Pic 4 - Mold wrapped in fleece
Pic 5 - Box with rear cut out
Pic 6 - Box sealed with sub before bondo
Pic 7 - Box with bondo/rage gold applied
Pic 8 - Box painted silver
Pic 9 - Completed sub box loaded with subwoofer

jortiz wrote:

---

Thats a pretty sweet box for a hoopty. What is this mixture of resin/cabosil expander?

---

If you go do a search on some previous posts, search for "cabosil" or even "aerosil".  Its a powder that you mix with resin & hardener.  This makes the resin into a gel like substance that you can use to reinforce enclosures with.  In order words, you can use this to stiffen up an enclosure from the inside rather than adding layers of fiberglass.  You want to at least get about 1/4 inch thick of the mixture to stiffen up the enclosure walls.

93accordSE wrote:

---

Looks like theres some divets in it, or is it just a reflection?

---

I think there was 1 or 2 little spots that weren't perfect, they could have been sanded more.  But I didnt want to spend too much time on this one being it was for my hoopty.

looks like sh*t, try sanding it next time, that helps with the divets

Your project is gonna have to be started over, at least on the side thats tacky, if glass doesnt set within a few hours its useless, the chemical reaction has a certain time to cure then its done for good, check your hardner for tempeture ranges as a few degrees can make a huge difference, if you started one side around noon and finished the next side up around 8 at night the variable is enough to make those directions useless, to cure some of this get a couple cheap spot lamps or any high output light for outdoor work and such, place the lamps so that the light is spread even and the lamps are about 2 feet above the work, check the glass frequently, DO NOT USE FAST HARDNER WITH THIS METHOD IN THE SUMMER it will melt/eat thru anything and cause total damage and have to be ground out and reglassed but in winter it will work very nicely, there is also a product that is made by ca i beleive that will instantly harden most fiberglass resins works great for speaker cloth or fleece layers will probably work great on chopped mats first layer as well.

J~

95xjsport wrote:

---

I built a box for the back of my jeep, it will hold two twelves but, I can't get that damn resin to harden, hafl of it is hard but the rest isn't, I followed the directions to the t and it is still sticky and soft in some places...

---

Did you mix the resin and catylist enough, sounds to me that it didnt get mixed enough.  Also, when resin starts to go bad its acts like that, Ive had it happen to me more than once.  Are you sure you used enough hardener?