|Forum topic by Lee Barker||posted 03-17-2012 02:52 PM||4558 views||0 times favorited||13 replies|
03-17-2012 02:52 PM
First, an apology if there is a better subforum for this post than “Hand Tools.” Do we need a subforum for “Adhesives and Clamping”?
I have used Franklin PG for years and it has come to have a place on the worktable, especially for repairs. I also use it for outdoor applications when it’s appropriate.
Recently I got some cheaper stuff, shown. I used it in repairing two side chairs, white oak, I am guessing 50 or 60 years old. The adhesive is PL Premium Wood Glue 100% Polyurethane, made by Henkel. www.stickwithpl.com
I was surprised at the differences and determined that I had extrapolated that attitude from yellow glues, which I have found to be virtually the same—no big difference to make one superior to the other.
When I scrape the Franklin, it is crispy like fried pork rinds. Really. It is difficult to clean up once it has dried, because it sticks so well even when not clamped. It comes off, but it scars the piece. It is also difficult to clean it off too soon. There is a sweet spot about 30 minutes in when it comes off in one piece (and doesn’t spread around like it does when you try to clean it off too early).
The PL is different. I glued and clamped the chairs just before leaving last night and declampified them 14 hours later. The glue remaining was rubbery. The included photo shows a run which ran the length of the leg. I scraped it off with a chisel and took this shot to illustrate how stretchy it is.
I have no way to correlate my observations with how it sticks. I challenge someone, and this may land back in my lap, to get three different brands of polyurethane glue and do a test something like Woodgears did on various types.
-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"