I think as the label notice, the blue is moisture resistant and the green is whaterproof. Same test on the samples after a 24 hours in a high moisture atmosphere and with the samples 24 hours submerged in water Maybe the goal of blue and green is not be stonger than the original, but enough strong in extreme conditions like exterior weather, the original is target to interior use saludos Gerardo
Thanks for watching the video and commenting! The product literature (images.thdstatic.com/catalog/pdfImages/d2/d28e8cf4-3660-4532-bdcc-7f78a3403bfb.pdf) says that the strength of Titebond III is supposed to be the strongest at 4,000 psi on hardwood. I expected it to be the strongest on a softer wood like Douglas Fir too but that wasn't the result I got. Take it with a grain of salt because this was just a small-scale test done in my garage. 😎
@@HacksbyDad Hi If we take the 4000 psi and is multiplied by the section of your specimen 1/2" x 3/4", the pull force has to be 1500 pounds... this number far away of the 250...350 pounds showed. Then we have to checkout if the 4,000pounds refers to this specific test, and it isn´t The 4,000 psi STRENGTH* mentioned in the brochure linked by you, images.thdstatic.com/catalog/pdfImages/d2/d28e8cf4-3660-4532-bdcc-7f78a3403bfb.pdf Strentgh have a shy asterisk.... * Maple to Maple (ASTM D905) Bond Strenght @ 70°C and this paragraph says in brackets an ASTM norm or test. if we read about the test in this link materialstandard.com/wp-content/uploads/2020/01/D905-08-Reapproved-2013.pdf the title is: Designation: D905 − 08 (Reapproved 2013) Standard Test Method for Strength Properties of Adhesive Bonds in Shear by Compression Loading1 It´s a specific test, the KEYWORDS are: IN SHEAR that means a force applied parallel to the faces of the sample with specific dimentions 2 x 1-3/4" x 3/4" now we know the plane where the forces has to be applied and BY COMPRESSION means the direction of this force. I agree that this 4,000 pounds is a scheme number because this plane of applied force and direction is not the normal situation resolved by the potential client for this products. 4,000pouds sounds always better than 250..350 pounds range it is a deception disguised under real tests for a hypothetical situation that the user may face sometime in his professional life, but about daily needs they do not mention anything saludos Gerardo
Very interesting! I’ve been using Titebond III exclusively because I figured it was stronger. One advantage it does have though is that it’s waterproof. One thought: these were all end-grain tests, the results could be quite different when gluing with the grain. (How about a test with two 1x2s crossed, glued on the narrow edges? I suspect it might give different results…)
Thanks for watching the video and the question. I did sample "with-grain" tests and the wood grain gave way before the glue bond which defeated the purpose of trying to test the strength of the glues. 😎
@@HacksbyDad Thanks for the reply! I guess that means if I’m gluing with the grain any, of them will be fine :-) But definitely good to know that the original titebond works best on endgrain. (I wonder if it’s because it’s thinner, so it seeps into the grain better?
@@DEtchells Thanks, but you should probably base your decisions on the manufacturer's specs vs my small-scale tests that are conducted in my garage. LOL
@@DEtchells for endgrain, it might help to first apply some diluted titebond to the endgrain, and let it dry before applying undiluted titebond and doing the actual glue-up. This is to prevent the end grain from soaking too much glue out of the actual joint
Thanks for the question. I did the test using end grain to minimize the chance of wood tear out affecting the results. The purpose of the test was to test the bonding strength of the glues. If I did the test with the grain... the wood grain most likely would have torn out before the glues failed. 😎
@@HacksbyDad Yeah it also makes sense to test it as the weakest joint possible, just to see the worst case scenario. This info helps confirm adding glue to my bed frame will be more than strong enough.
