Fiberglass waterproof?

[Flipx99 5,000+ posts]

Is the fiberglass resin you buy at stores waterproof? My trunk leaks and on my next box build I was thinking of 'glassing the box to make sure it doesn't swell because of the water.

For some reason, the trunk lid has "lifted" and I am not sure how to adjust it.

Click to read more...

 

[skmfkr 5,000+ posts]

yes i believe so

 

[Rich B 5,000+ posts]

Boat hulls are made with fiberglass.

 

[JimJ 5,000+ posts]

Yeah, otherwise it'd **** to be on a jet ski...

//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[nbro3232 10+ year member]

resin will weigh much more than some polyurethane

 

[Kenny Pollock 10+ year member]

Yeah, otherwise it'd **** to be on a jet ski...
//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

Or a surfboard //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[Flipx99 5,000+ posts]

My question is, is the resin at lowe's (the elmer's or bondo stuff) waterproof. I wasn't certain if there was a difference or grades of resin.

So, it's safe to assume that normal fiberglass is waterproof

 

[azbass 5,000+ posts]

are you serious?

 

[nbro3232 10+ year member]

just use some polyurethane to coat the box, it will be lighter and most likely cheaper

 

[Kagymp5 10+ year member]

My question is, is the resin at lowe's (the elmer's or bondo stuff) waterproof. I wasn't certain if there was a difference or grades of resin.
So, it's safe to assume that normal fiberglass is waterproof

your joking right?//content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif

 

[Flipx99 5,000+ posts]

are you serious?

Yes, I am. My knowledge of fiberglass resin is minimal.

just use some polyurethane to coat the box, it will be lighter and most likely cheaper

polyurethane cannot be submerged in water for long periods. The carpet in the trunk absorbs the water and the box essentially sits in water after a hard rain. I think it would take many coats for the durability I need.

your joking right?//content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif

Again, I am serious. I don't think they make boats and surfboards out of the same stuff they sell at Lowe's. They might, but I don't think so.

 

[Bolognablake 10+ year member]

My question is, is the resin at lowe's (the elmer's or bondo stuff) waterproof. I wasn't certain if there was a difference or grades of resin.
So, it's safe to assume that normal fiberglass is waterproof

To answer your question, yes it's water proof.

You might want to focus your attention on fixing your trunk though. I'm sure things get stinky after it rains.

 

[Flipx99 5,000+ posts]

Thanks.

I have tried but I am unsure what is exactly wrong. Part of the trunk is level, but it rises and then becomes level again. I think it is the 3 layers of rammat, plus age that is what is killing me.

I am looking for a new (to me) car in the 4-6k range.

 

[ramos 5,000+ posts]

Boat hulls are made with fiberglass.

If you want to get technical , the glass isn't expsosed to the water in boat hulls . The gel coat is //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

And yes polyester or epoxy resin can form a water Resistant barrier //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[nVRuckus 5,000+ posts]

If you want to get technical , the glass isn't expsosed to the water in boat hulls . The gel coat is //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
And yes polyester or epoxy resin can form a water Resistant barrier //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

dead on.