dillonf
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Post by dillonf on Jun 20, 2023 20:46:26 GMT -5
When you glue a rock to wood for putting it in the vise for slabbing what adhesive do you use? Any tips?
I've never done this before.
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Post by stardiamond on Jun 20, 2023 21:02:40 GMT -5
I use water glass or carpenter's glue. Water glass dries quicker and soaks off faster but I haven't muuch luck with larger rocks. Carpenter's glue takes longer to dry and getting the last slab off can be difficult.
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dillonf
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Post by dillonf on Jun 20, 2023 21:05:55 GMT -5
I use water glass or carpenter's glue. Water glass dries quicker and soaks off faster but I haven't muuch luck with larger rocks. Carpenter's glue takes longer to dry and getting the last slab off can be difficult. Thanks! |
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Post by chris1956 on Jun 20, 2023 21:10:13 GMT -5
I don't have a lot of experience. You might do a search as there have been previous discussions about this. I have only used the waterproof carpenter's glue. I usually let it cure for a couple weeks. Then to get the last slab off, I let it set in water for another couple weeks (eventually it softens up even though it is "waterproof") and I can break it free of the glue. Haven't gotten around to trying other ways.
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dillonf
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Post by dillonf on Jun 20, 2023 21:21:22 GMT -5
I don't have a lot of experience. You might do a search as there have been previous discussions about this. I have only used the waterproof carpenter's glue. I usually let it cure for a couple weeks. Then to get the last slab off, I let it set in water for another couple weeks (eventually it softens up even though it is "waterproof") and I can break it free of the glue. Haven't gotten around to trying other ways. Thanks! Good to know the cure time! |
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Post by HankRocks on Jun 20, 2023 21:31:01 GMT -5
I use Wood Glue(Carpenter's glue) to attach the cut side of rocks to pieces of 2X4, 4X4, and 6X4. The bigger the rock's flat surface, the longer I allow for the glue to dry, up to a month or more for a rock that's say 6" x 8". The 2X4 rocks are cut on the 10" saw, the smaller 4X4 rocks are cut on the 20" saw and the bigger pieces are cut on the 24" saw. As mentioned above after the last cut, the wood with the rock is soaked in soapy water, which can take over a month to release.
Make sure the cut side to be glued is free of any dirt or oil residue which can cause the glue to let go.
The good news is that I have several buckets of cut rocks so waiting a while for particular rock is no big deal.
Good luck.
Henry
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Post by catmandewe on Jun 20, 2023 21:50:47 GMT -5
Wash the face of the stone down with acetone before you glue it, I use elmers glue or carpenters wood glue (doesnt release well in water), both work equally well. I dont soak the last slab, I cut right to the board.
Tony
PS, if I am in a hurry I will use super glue on a metal 2x2, to release the glue run a torch inside the tubing and the last slab will fall off
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dillonf
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Post by dillonf on Jun 20, 2023 22:03:55 GMT -5
I use Wood Glue(Carpenter's glue) to attach the cut side of rocks to pieces of 2X4, 4X4, and 6X4. The bigger the rock's flat surface, the longer I allow for the glue to dry, up to a month or more for a rock that's say 6" x 8". The 2X4 rocks are cut on the 10" saw, the smaller 4X4 rocks are cut on the 20" saw and the bigger pieces are cut on the 24" saw. As mentioned above after the last cut, the wood with the rock is soaked in soapy water, which can take over a month to release. Make sure the cut side to be glued is free of any dirt or oil residue which can cause the glue to let go. The good news is that I have several buckets of cut rocks so waiting a while for particular rock is no big deal. Good luck. Henry Thanks Henry! That helps! |
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dillonf
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Post by dillonf on Jun 20, 2023 22:05:06 GMT -5
Wash the face of the stone down with acetone before you glue it, I use elmers glue or carpenters wood glue (doesnt release well in water), both work equally well. I dont soak the last slab, I cut right to the board. Tony PS, if I am in a hurry I will use super glue on a metal 2x2, to release the glue run a torch inside the tubing and the last slab will fall off Thank you Tony! This gives me some options!! |
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quartz
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Post by quartz on Jun 20, 2023 22:16:33 GMT -5
I've had good luck getting wood glued or waterglass glued slabs to release off a board end by soaking them in water heated on a hotplate, outside for less mess, half hour at most.
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dillonf
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Post by dillonf on Jun 20, 2023 22:20:07 GMT -5
I've had good luck getting wood glued or waterglass glued slabs to release off a board end by soaking them in water heated on a hotplate, outside for less mess, half hour at most. Thanks. Good tip! |
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Post by Rockoonz on Jun 20, 2023 22:51:29 GMT -5
Regular gorilla glue here, apply glue to wood and get the rock wet, it's water activated. I clamp them with bar clamps.
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Post by Peruano on Jun 21, 2023 6:25:16 GMT -5
Regular carpenter's glue; overnight cure; cut the last slab off with any saw that you would use on the wood side. I typically use a hack saw. The thin layer of wood allows quick (overnight) penetration of a water soak and the sliver of wood floats off. Easy peezy and you get the exercise of 60 seconds of saw exercise.
Cure must be at room temperature in winter. Glue won't set up well at lower temps.
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Post by Rockoonz on Jun 21, 2023 7:57:18 GMT -5
I just hang the board out far enough to cut it off with the saw, but a hand saw would work good too.
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dillonf
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Post by dillonf on Jun 21, 2023 18:53:46 GMT -5
Regular gorilla glue here, apply glue to wood and get the rock wet, it's water activated. I clamp them with bar clamps. Cool. I have some Gorilla glue left over from gluing my Lot-O to the cinder block! |
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dillonf
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Post by dillonf on Jun 21, 2023 18:55:24 GMT -5
Regular carpenter's glue; overnight cure; cut the last slab off with any saw that you would use on the wood side. I typically use a hack saw. The thin layer of wood allows quick (overnight) penetration of a water soak and the sliver of wood floats off. Easy peezy and you get the exercise of 60 seconds of saw exercise. Cure must be at room temperature in winter. Glue won't set up well at lower temps. Thanks! Good tips on removing the wood and on curing temps! I'm in Texas, so I can only dream about cooler temps - haha |
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Post by Peruano on Jun 22, 2023 5:19:03 GMT -5
Think December and an unheated workshop! In the winter months, I bring in the glued rocks I'm working on just like the geraniums.
I could cut the last slab or remnant with the rock saw but my saw time is faster if I do it by hand and free the saw for the next slab candidate. I'm retired and use lots of inefficient acts as a way of generating exercise.
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Mark K
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Post by Mark K on Jun 22, 2023 8:12:41 GMT -5
I discussed this with Tony at Q. I got some wood glue at the flea market and it works great. I run the cut rocks under my 140 degree hot water and when they are good and clean, I often run them through my dishwasher. They are perfectly clean. I glue the 1x2 or 2x2 or 2x4 to the rock and clamp it together. Then they sit for a day or so and I take them out of the clamps and set them aside for at least a few days. Over the winter I did over 100 rocks so I did not have to hurry. I still have a boat load left. To get them off I experimented with soaking in water, cutting right next to the rock on the table saw, and boiling the hell out of it. So far, boiling the rocks off seems to work the best. I bought a crummy old pan for it and that is all it is used for.
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rockbrain
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Post by rockbrain on Jun 22, 2023 8:52:56 GMT -5
Perfect timing on this post. I've been researching and reading past threads about this very thing. I was going to post a similar question just because glue has changed so much in the last few years but it seems most are doing it the same as in the past. It also seems like the brand of carpenters glue doesn't matter much. I did see people talk about the original Gorilla Glue for slightly irregular surfaces as it foams up some and fills in some gaps. One method I didn't see mentioned her is epoxy or JB Weld. I think that might be better for rocks that don't have a flat surface. I saw a posting from Cigar Box Rocks where they use JB Weld and then just cut through it at the end. catmandewe do you use a solid steel 2x2 or a piece of square tube? Is it ok to cut into the wood with the slab saw blade? I wouldn't think it would hurt it but just want to make sure. |
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rockbrain
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Post by rockbrain on Jun 22, 2023 8:54:17 GMT -5
I'm wondering how necessary clamps are. I've read suggestions that having a thicker layer of glue will actually help water get in for the soaking process.
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