What kind of glue is this?

[Beechwood Chip]

What kind of glue is this?  Can I run it through my jointer and planer without chipping the knives?

It almost looks like Great Stuff expanding foam, and I can easily dent with my thumbnail.

I want to pry off the wood, scrape off the glue, then mill the wood.

The 3rd picture is what it looks like scraped off.

 

 

[Tpt life]

Foamy and smooth says poly. Proceed with caution. 

[pkinneb]

I agree Polyurathane 

[wtnhighlander]

Third agreement. Something like gorilla glue.

Jointing / planing is a gamble, should be ok with carbide cutters, but a risk for HSS.

[Beechwood Chip]

Glad I asked.  I have carbide on the planer, but I think the jointer is HSS.

Thanks, all.

[Kustom Beams]

This appears similar to Great Stuff expanding foam, exhibiting a soft and easily dentable texture. Before attempting to run it through a jointer or planer, it's crucial to identify the adhesive's composition to avoid damaging equipment or causing injury. Once confirmed safe, carefully pry off the wood, remove excess glue, and proceed with milling. Prioritize safety and precision to achieve optimal results.

[Beechwood Chip]

This is "reclaimed" wood that I was going to cut up for a for a shop project, so I'm just going to cut out the parts with glue on them.  I'm cutting up a bunch of scraps and leftovers to make a clamp holder.  No use risking my tools over it.

[Mark J]

If you wanted to pursue it (or experiment), you could try sanding to remove most or all of the old glue.

[Beechwood Chip]

On 5/13/2024 at 8:51 AM, Mark J said:

If you wanted to pursue it (or experiment), you could try sanding to remove most or all of the old glue.

Thanks, that was my plan  But then I thought, "why put in the effort to save few inches of scrap wood?"  This is wood that a friend gave me, and honestly if I had seen it first I would have said, "don't bother".  It's on my, "too big to throw out, try to find a use for it" pile.

 

[tperson]

On 5/12/2024 at 7:43 PM, wtnhighlander said:

Jointing / planing is a gamble, should be ok with carbide cutters, but a risk for HSS.

I'll bite...why a risk for HSS?

[Mark J]

As I understand it, glue is much harder than wood, so the glue lines wear the blades.  Which is why you're not supposed to joint plywood edges.  Carbide is harder than HSS, so may do better, but still glue is best avoided.

[drzaius]

I edge jointed a length of Baltic birch once and it left the knives looking more suited for cutting bread than wood. Amazing how fast the glue wore away the steel.

[Tpt life]

Uncured poly will not be harder than wood, but will be gummy, loading cutting edges with something akin to pitch. This will introduce heat, and bog things down. I won’t say don’t do it, but will repeat to proceed with caution.