WOP gone hard

[Tiger]

Can WOP that's solidified be rescued?

[dr4g0nfly]

Eh... Nope!

Going hard is the effect of it going off on the workpiece.

[Tiger]

Thanks Dragonfly, I kinda suspected that there wasn't much I could do but I haven't had it for very long. It had the crappy screw top on it that I thought had sealed it up but obviously it didn't :(.

[LGS]

Hi Tiger,

WOP will go off in the presence of air. When you take some out of the can, you leave an air pocket, which starts setting the Poly. Some people put marbles or small stones into the can to bring the level back to the top. thus preventing air from getting to the WOP.

Regards,

Rob

[Hermit]

Hi Tiger,

WOP will go off in the presence of air. When you take some out of the can, you leave an air pocket, which starts setting the Poly. Some people put marbles or small stones into the can to bring the level back to the top. thus preventing air from getting to the WOP.

Regards,

Rob

Now that's a good idea. Not just for poly, either. Applicable to a wide range of air-setting products.
Thanks.

[Chesand]

Decant into smaller containers. I have mine in 200ml brown plastic bottles.
I checked this with the Minwax Rep at Melb WWS last October and was told it was OK.

[Tiger]

Hi Tiger,

WOP will go off in the presence of air. When you take some out of the can, you leave an air pocket, which starts setting the Poly. Some people put marbles or small stones into the can to bring the level back to the top. thus preventing air from getting to the WOP.

Regards,

Rob

Thanks Rob, that explains it. I put the top back on and I knew it was on securely but yes there would have been an air pocket. Wish they'd tell us this on the container. Now to find some marbles....

[Tiger]

Decant into smaller containers. I have mine in 200ml brown plastic bottles.
I checked this with the Minwax Rep at Melb WWS last October and was told it was OK.

Hi Herbie,

Just standard plastic bottles, where did you get them from?

[_fly_]

I was always told to stand them on their heads. Paint as well.
Its not the air that you trap in the can its the air still moving inside and outside past the cap.
I've got a tin of gloss oil paint that has a thin skin on the bottom, when I turn the can over the stuff above is fine even after 4 years.

[Christos]

I have some paint cans that I turned upside down and in a plastic bag just in case I create a mess.

The wipe on poly that I have is only recent and only a small amount used. I reseal the can after placing a small amount in a plastic cup. The left over does not go back into the can. I have also seen on you tube person squeezing the can with a clamp to get the air back out of the can. Have not tried this myself yet.

[Hermit]

II have also seen on you tube person squeezing the can with a clamp to get the air back out of the can. Have not tried this myself yet.

This would be a good idea. I always do it with tubes of adhesive - sqeeze all air out until there's a bead at the tip before capping tightly. They last much longer.

[Chesand]

Hi Herbie,

Just standard plastic bottles, where did you get them from?

I was able to get them through my work place before I retired.
Glass (either clear or brown) would do equally as well - it is just that my workshop is a glass free place.

[_fly_]

The twist top plastic Tomato sauce bottles should work. Maybe next bunnies sausage sizzle, see which bottles sauce they are using. I put glue in them. But maybe good for WOP as well as you can squeeze it to get the air out before closing.

[Tiger]

The twist top plastic Tomato sauce bottles should work. Maybe next bunnies sausage sizzle, see which bottles sauce they are using. I put glue in them. But maybe good for WOP as well as you can squeeze it to get the air out before closing.

Good idea. I know I've got a couple at home but they are 3/4 full of sauce. Can you buy these or will I just have barbeques for the next few days until the bottles are empty?

[Acco]

I doubt the sauce bottles will be good enough as I've tried the squeeze the air out trick for glue on them and they've always returned to the original shape, so they aren't exactly air tight.

[Tiger]

I probed what was left in the can and it was hard as a rock except for one small section. It had a soft jelly consistency. I took out what I could and mixed it with some mineral turps, eventually it settled into something that looked like the original mixture. It was probably a little more runny than what it should be but I used it on a bit of wood and it seemed to be ok, time will tell.

[Tiger]

Now that's a good idea. Not just for poly, either. Applicable to a wide range of air-setting products.
Thanks.

What are the other air-setting products?

[Hermit]

What are the other air-setting products?


Adhesives etc. I had contact adhesive in mind, mainly.

[Matador]

Hi Tiger ,

I use those beef or chicken stock powder plastic screw top contains to put paint in . I've had paint in some up to 2 years and the paint is still good . I find they are better then the tins the paint comes in . I hope that helps .

Cheers Graham

[Hermit]

Yeah, pretty much anything that thickens over time in contact with air.

[Sturdee]

Thanks Dragonfly, I kinda suspected that there wasn't much I could do but I haven't had it for very long. It had the crappy screw top on it that I thought had sealed it up but obviously it didn't :(.

What brand of poly are you using as I'm using the Minwax WOP, also in a can with a screw top, without any problems and mine is at least 2 years old.


Peter.

[Hermit]

What brand of poly are you using as I'm using the Minwax WOP, also in a can with a screw top, without any problems and mine is at least 2 years old.
Peter.

Peter, my MinWax (Water-based) Wipe-On Poly came in a plastic bottle with a 'pop top'. (473ml, from memory).
If dry poly builds up at all around the pop-top seal, it could allow air to enter pretty easily. (I keep it spotless.)
I get through a bottle in a couple of months - doesn't have time to go off.
I didn't know it came in cans. What size?

[Sturdee]

Peter, my MinWax (Water-based) Wipe-On Poly came in a plastic bottle with a 'pop top'. (473ml, from memory).
If dry poly builds up at all around the pop-top seal, it could allow air to enter pretty easily. (I keep it spotless.)
I get through a bottle in a couple of months - doesn't have time to go off.
I didn't know it came in cans. What size?

Mine comes in a rectangular can of 473mil similar to this one (http://www.globak.com.au/POLYURETHANE/Minwax%C2%AE-Wipe-on-Poly/48/productview.aspx) except it has a metal screw top on the left hand side of the top.

As I said mine is old stock, got it 2 years ago from stock donated by a another men's shed to ours.

But though it's old it's still good. :2tsup:

Peter.

[Hermit]

Mine comes in a rectangular can of 473mil similar to this one (http://www.globak.com.au/POLYURETHANE/Minwax%C2%AE-Wipe-on-Poly/48/productview.aspx) except it has a metal screw top on the left hand side of the top.

As I said mine is old stock, got it 2 years ago from stock donated by a another men's shed to ours.

But though it's old it's still good. :2tsup:

Peter.

Right. Looks like they've recently changed the container. I only started buying it 3 months ago. (That's when I got into woodworking.)

[Tiger]

What brand of poly are you using as I'm using the Minwax WOP, also in a can with a screw top, without any problems and mine is at least 2 years old.


Peter.

It looks the same as mine but the screw top is child-proof and hard to get off unless you use pliers, it actually recommends that you use pliers on the instructions because it's hard to get off. I've only had mine for 6 months and it has started to go off.

[dr4g0nfly]

Yeah, pretty much anything that thickens over time in contact with air.

I resemble that remark! :;