how cold is too cold

[johny24 0]

Hey, well over the past couple days ive been smoothing out the wall that ive had for about 3-4 months. i couldnt do anything before because it was -15 degree C all the time. the last few days have been +2 to 4 degrees, warm enough for a tshirt. but today its about -2. If i kept goin today, itd be done and painted, but is it too cold for bondo to cure? or will it just take longer to cure? thanks

[Tirefryr 1,742]

As long as it's mixed correctly, it will just cause a longer cure time. You can always mix it "hot" by adding a little more hardener, but then you run the risk of waste and less work time. Also, keep in mind, it may not adhere properly to a cold material. That's what you really have to worry about.

[johny24 0]

thanks thats good to know, never even thought about the temperature of the material i was applying to though, but it came out good. paint tomorrow if it stops snowing

[ramos 2]

I would also like to add , that mixing resin hot is okay to an extent . Mixing it too hot will cause it to cure to fast and result in shrinkage and cracking sometimes . Bondo on the other hand . I don't mix filler hot . It changes the sandability ( new word nukka ) of it . The hotter the mix , the harder it is to sand .

[Godsmack 361]

I need a full out tutorial on glassing and resigning boxes.

J

[ramos 2]

resining a box is easy . Mix the resin , pour in box . Swish around for a minute or so to coat everything . Go back and touch up areas you missed with a brush .

[Godsmack 361]

Okay what do I mix to make resin?

J

[bdawson72 0]

Okay what do I mix to make resin?

J

You just buy the resin from a hardware store and mix in the hardener

[ramos 2]

you mix mekp with polyester resin , or the specified catalyst for your brand of epoxy . I wouldn't add talc or anything . Using resin on the inside of an enclosure is purely for sealing purposes , it adds little to no strength. Adding talc or other fillers will inhibit the resin from doing what you want it to , which is sealing the mdf in this case .

[Tirefryr 1,742]

Using resin on the inside of an enclosure is purely for sealing purposes

Don't let the SPL guys hear you say that.

[Godsmack 361]

actually let them hear it.

From my understanding of SPL sealing it so less air has a chance of getting out =good

Therefor its benifical to SPL.

J

[Tirefryr 1,742]

But that is not their theory.

[ramos 2]

There are other Cheaper products that work just as well for the same purpose , and do actually add structural strength . But they never listen

[Godsmack 361]

please inform me

J

[ramos 2]

actually let them hear it.

From my understanding of SPL sealing it so less air has a chance of getting out =good

Therefor its benifical to SPL.

J

also smooths airflow a little . Not as much as proper enclosure design can . But enough to make some sware by it

[ramos 2]

please inform me

J

Polyurethane pl roofing sealer is a poly based roofing coating that has long strand fiberglass in it . It hardens like a rock , goes on and can be smoothed with a trowel . And cost like $30 for a 5 gallon bucket of the stuff . But people here the word polyurethane and automatically think of the poly used for finishing furniture. There are all kinds of poly based products

[Godsmack 361]

I am getting excited to start building!!!

J