I have been sealing the full inside and outside with Pva glue. I know it’s not necessary so I would like to know what I really need to do. Do I just seal the end grain on the outside of bowl and not put any seal in the inside?
Okay, so, are these twice turned bowl blanks and you have removed most of the bulk? There are hosts of sealers out there for rough turned bowl blanks. PVA glue actually works really well since it breathes, and water can escape. If you are twice turning your bowls, do make sure to round over the rim, both inside and outside since a sharp edge can cut you, and a sharp rim is far more likely to crack since there are limits to how tall of a bowl you can make. You want even wall thickness, but when you come to the rim, there is no more wall, and rounding over the rim eases the stress that a sharp edge makes. Outside end grain especially needs to be sealed, and inside grain doesn't hurt to seal that either.
robo hippy

I have been sealing the full inside and outside with Pva glue. I know it’s not necessary so I would like to know what I really need to do. Do I just seal the end grain on the outside of bowl and not put any seal in the inside?


I use a similar product and seal the entire bowl also. I keep a minimum of 150 bowls drying so I always have bowls ready to second turn. I’d hate to go to my shop and not have a bowl to turnAs for sealing roughed bowls, I'm a believer in sealing the entire bowl with a wax emulsion sealer I've sourced from CSUSA for the past 40 years. It does breathe, so it successfully slows down the rate of moisture loss.....and, that's exactly what you want. The slower the seasoning process, the fewer stress cracks you will have.....it's that simple!
When it comes to seasoning a roughed bowl......time is your friend! With that in mind, the best way to have as few problems as possible, a turner needs to have many bowls drying at a time. When the monthly weights stabilize.....the MC has stabilized to it's own environment. (This is an important consideration, as @Dean Center appropriately suggests above in post #5.)
With many bowls in the seasoning process at any given time, along with monthly logged weights, the choice of which bowl to 2nd turn next becomes much less problematic for a bowl turner.
=o=
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Good idea - thanks!I sealed several rough turned green bowls today and thought it worth passing this tip on.
To keep Anchorseal much less messy than pouring it out into a smaller container or using the side of the rim to take the excess off a brush, fold a piece of painters tape in half and tape over the can top. I do this because a pet peace I have is cleaning up the rim so a paint can will reseal properly.
How do you determine which bowls are more likely to crack?I never seal rough turned bowls. The important part is to turn the bowls so they can change shape as they dry. If they cannot change shape, they will only take longer to crack. If they have a shape that I think may crack if dried too quickly, I just put it in a paper bag for the first week or so.
Pith present, fruit woods . . . other ways I’m sure.How do you determine which bowls are more likely to crack?
Nice storage racks - like how you’ve placed the “stickers” to provide even airflow around the bowls - will incorporate these ideas into my shop - thanks!I use a similar product and seal the entire bowl also. I keep a minimum of 150 bowls drying so I always have bowls ready to second turn. I’d hate to go to my shop and not have a bowl to turn. Every time I second turn 4-8 bowls I will replace them with green bowls. This is one of 3 shelves, plus several stacks in the floor.
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I suspect the roughs are not as dry as you think. A moisture meter really does not tell if the wood is fully acclimated. Weighing the piece, and weight changing very little over the last 2-3 weeks, is a much better indicator. Fully sealed blanks will take a long time to acclimate. Also, even really dry wood will move some due to stress relief as it is rounded and then reduced in thickness. This is why I 90% round the OD, then ~90% round the ID, then go back and finish the OD.Do most of you dry in a controlled envionment?
I have been rough turning, sealing and putting in my garage (fluctuating temperatures and moisture) using cedar shimms ever since my first bowl. Then at some point before final turn I will move to the basement to acclamate to their new environment for a few more weeks.
However, even when I feel they are adequately dry, (weight loss and moisture content below 6%) they can still warp some, and continue to move out of shape.
I seal the entire roughed out bowl , inside and out with anchor seal 1 or 2.









Odie, is that stuff similar to anchor seal in consistency? Been using anchorseal to end coat logs, was planning on painting my blanks with it as well, storing similar to what you have going on, recently dug out a couple pretty decent sized koa trees in my yard and want to blank out everything that cant be sawn into lumber on my band mill so have a lot of rough stuff to turn. Trying to be methodical with this so researching the best way to go about it.As for sealing roughed bowls, I'm a believer in sealing the entire bowl with a wax emulsion sealer I've sourced from CSUSA for the past 40 years. It does breathe, so it successfully slows down the rate of moisture loss.....and, that's exactly what you want. The slower the seasoning process, the fewer stress cracks you will have.....it's that simple!
When it comes to seasoning a roughed bowl......time is your friend! With that in mind, the best way to have as few problems as possible, a turner needs to have many bowls drying at a time. When the monthly weights stabilize.....the MC has stabilized to it's own environment. (This is an important consideration, as @Dean Center appropriately suggests above in post #5.)
With many bowls in the seasoning process at any given time, along with monthly logged weights, the choice of which bowl to 2nd turn next becomes much less problematic for a bowl turner.
=o=
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Odie, is that stuff similar to anchor seal in consistency? Been using anchorseal to end coat logs, was planning on painting my blanks with it as well, storing similar to what you have going on, recently dug out a couple pretty decent sized koa trees in my yard and want to blank out everything that cant be sawn into lumber on my band mill so have a lot of rough stuff to turn.
Been buying anchor seal through woodcraft, shipped through UPS, is about the only way to get it reasonably fast and not leaking from the box when i get it, going tolook into other sealers and suppliers. Have been trying to find the local club, is virtually non existent, its a strange dynamic out here, from experience people tend to be ridiculously overprotective of info, kinda weird actually, they think someone new will edge them out of their niche, or some other strange thought process, ran into the same thing when i was running my sawmill and shop a couple decades agoI'm not Odie and haven't used the exact wax emulsion sealer mentioned, but have been using Anchorseal for years. Years ago I bought a 55-gal drum - it was about $6/gallon. I'm running low, think I get 5-gal this time. https://uccoatings.com/pages/anchorseal-homepage
Maybe they have a distributor in your area.
I know several clubs who buy in quantity and sell it to members. Might check with nearby any local clubs or if your club might be interested in doing this.
- Anchorseal is a wax emulsion: paraffin, water, surfactant.
- UC Coatings changed the formula a few years ago and call it AnchorSeal2. I've been happy with the original.
- Anchorseal is thin enough to spray on the ends of logs at the sawmill. I usually brush it onto logs with a cheap 4" wide brush.
- I use it to seal turning blanks I cut from green wood before drying them. Very effective.
- For turning blanks I like a thicker coating so I pour some Anchorseal into plastic coffee cans and leave the lid off until some water evaporates and the stuff gets thicker. (Can't easily apply a second coat over dried wax emulsion) I've dried many hundreds (probably 1000s) of blanks this way, from 1x1 squares to 10x10x14" blocks of a variety of domestic species and have had almost zero failures. I use the weight method to access drying. I don't weigh and mark every blank but just a piece or two of a batch from the same tree. I dry indoors in a climate-controlled shop. Big, solid blanks can take years to dry.
- I coat the end grain of all blanks and the side grain in certain cases with certain species.
- After an initial 2-weeks or so of drying, I examine each blank and if I see a crack developing I immediately cut it away and reseal. If the crack is on a side that wasn't initially sealed, I seal the entire outside of the blank
- Some say they seal just the end grain on rough-turned bowls.
- Some say for rough turned bowls they coat the entire outside so as the inside dries quicker it will tend to contract and pull the outside together. I have no experience with this.
- Kiln literature says aluminum paint also works well. They say roofing tar is great but yikes! Oil-based paint will also work but latex is not recommended.
Note that wood dealers, especially those who sell exotic and unstable species, often dip the entire blank into hot paraffin for a thick, non-emulsion, coating, with no regard to the actual moisture content. One dealer I know keep a hot vat, dips the blank 1/2 way, dips the other half after cooling. This is extremely effective but really slows down the drying significantly. (I also track the drying of those by weight.) After a dipped blank dries for a while I often scrape off some of the paraffin to speed up the drying a little - hasn't caused any problems yet. I'm not sure the hot dip would make sense for rough-turned bowls.
JKJ

My first buy came in a commercial plastic 55-gal drum - very sturdy.Been buying anchor seal through woodcraft, shipped through UPS, is about the only way to get it reasonably fast and not leaking from the box when i get it, going tolook into other sealers and suppliers. Have been trying to find the local club, is virtually non existent, its a strange dynamic out here, from experience people tend to be ridiculously overprotective of info, kinda weird actually, they think someone new will edge them out of their niche, or some other strange thought process, ran into the same thing when i was running my sawmill and shop a couple decades ago
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Although the sealer I mentioned from CSUSA is what I've been using exclusively since the mid-80's, I believe it's essentially the exact same thing as commercial Anchorseal.Odie, is that stuff similar to anchor seal in consistency? Been using anchorseal to end coat logs, was planning on painting my blanks with it as well, storing similar to what you have going on, recently dug out a couple pretty decent sized koa trees in my yard and want to blank out everything that cant be sawn into lumber on my band mill so have a lot of rough stuff to turn. Trying to be methodical with this so researching the best way to go about it.
Thank you sir, kinda what i thought from reading the PDS for both and comparing, i was kinda figuring id treat the blanks like lumber, let em set for close to a year, pretty humid out here and a 4/4 board takes close to 14 months to hit equilibrium safely. At least so you can use it and not have it move too much.Although the sealer I mentioned from CSUSA is what I've been using exclusively since the mid-80's, I believe it's essentially the exact same thing as commercial Anchorseal.
What you want is for a pathway for moisture to expel, but at a much slower pace. It's exactly this that allows internal stress within the wood to conform to a new altered shape without cracking.
I'd say it's about 98% foolproof, when used in conjunction with monthly weights, time, and at the very least, three months of unchanged monthly weights. I usually add to that 3-month minimum during excessively wet and/or winter months...
=o=
Last activity on the local Maui chapter website was in 2017, so been a while, know a few turners out here, lots of wood workers, will figure this stuff out, hell, i taught myself how to make boots watching youtube videos and same with rigging up my heat treating/tempering oven, its like playtime for this old fart.My first buy came in a commercial plastic 55-gal drum - very sturdy.
I think they also ship by steel cans/drums. Might call or email and ask. It's widely available here - I found out about one of their distribution centers that's not far from me. I'm going to call them soon, maybe they can tell me about how best to get it in your area.
That IS strange about the dynamic you describe. Around here, woodturners, furniture makers, sawmill operators, machinists always seem willing to help where they can. Maybe the difference is there are so many people and the market so big that no one feels threatened. Woodturners, especially are some of the most giving and sharing people - no end to the free mentoring and teaching and tool/wood sharing. One woman drove from an arid area in the western US and went home with a station wagon with slabs unavailable where she lived. A guy today brought me a avacodo log - never tried that before! Once a guy sent me a piece of Koa - saving it for a special occasion!
People often ask me how much I charge for lessons (turning, welding, etc) and I tell them all the same thing: a good story or a good joke! (Some still owe.)
I have a small Woodmizer mill and have cut up numerous logs for people - they haul the logs, help with the offloading/stacking and there's no charge.
And when I get stuff I don't have the time or energy to saw or even process into blanks, I call the club and they send out an email to the members - people show up with chainsaws. I hold the logs at waist height so they can cut what they want and I load the pieces for them. Keep a pressure washer and wire brush at hand to clean off any chain-destroying dirt/gravel. We are both happy - a win-win!
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For a local AAW chapter club, did you check the AAW website chapter locator? I think I saw some in Hawaii but don't remember which island. (Love visiting Maui! Hey, next trip maybe I can bring a suitcase of wood! A guy from Australia did that when he visited me. I brought back a suitcase of Olive from Italy once.)
JKJ
