Waterproofing MDF sub box....

[audioholic 5,000+ posts]

Yeah, the hardener is for the resin, regardless of whether or not glass mat (or anything else) is used.

But its an understandable question, Ive seen it asked before. I even forgot to add hardener when I put resin on the inside of my last box. It stunk for a month or two, bad. Don't forget hardener. lol

 

[Immacomputer 10+ year member]

Resin or polyurethane. Polyurethane is the cheapest route at like under $10 and it will work. It will sand smooth and is very easy to apply.

 

[Jakkle5 10+ year member]

I put one coat of resin on it last night. Going to put one more on it today. Is there a need to put it on the inside of the box also?

 

[iamamp3pimp 5,000+ posts]

thats just going to kep the insode waterproof and keep it from swelling if there are any leaks.

if its ported id resin the inside.

if its sealed, i wouldnt worry about it.

 

[Jakkle5 10+ year member]

Got it. One more question, this resin is taking like 10-14hrs to cure and even then its still lightly tacky. What am i doing wrong? I used more than enough cure mixed in. //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[funkyab 10+ year member]

Got it. One more question, this resin is taking like 10-14hrs to cure and even then its still lightly tacky. What am i doing wrong? I used more than enough cure mixed in. //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

Something is SERIOUSLY wrong if it is taking that long to harden. What is the temperature and humidity where you are working? Under normal conditions, if you mixed the resin and hardner as per the generic specs of the manufacturer your coats should be dry in no more than 30 minutes to 1 hour or so, and ready for sanding. When i did this to my boxes, I gave them 4 good coats of resin on the outside, sanding between each of course and one good coat on the inside, then paint. This was a great project and i learned a lot. Let me know if there is anything i can do to help. I have attached pics of mine.

A