(upbeat music) marc:hi, i'm marc spagnuolo from thewoodwhisperer.com. as you probably already know, there are a lot of glueson the market today. now fortunately, good old pva glue usually does the trick, but there are gonna be times when a specialized glue is going to make our lives a lot easier
and give us much better results. and one of my favoritespecialized glues is urea resin. because of it's long open time, i like to use it for complex glue ups. now an added bonus is thatunlike standard pva glue, urea resin is gap fillingand it'll help you lock down those joints that, well, they could be a little bit tighter if you know what i mean.
now another property that i really like is the fact that it providesa very rigid glue bond. now put all these things together and we have the perfectglue for veneering. but not all urea resinglues are created equal. now there are 2 types that i keep on hand at all times. the first is unibond 800. this is a 2-part mixture of a liquid resin
and a powdered catalyst. now this is my primary veneering glue. the other brand that i like to use is dap weldwood. it comes as a powder andneeds to be mixed with water, but that's exactly why i don'tuse this stuff on veneer. the water gets absorbs into the veneer and could cause problems as the wood dries after the glue up.
i've even heard from a few people who've used this stuffin a veneering project only to come back the next day to find that their joints opened up so i say better safe than sorry and i stick with thewater-free formulations. now there is a safety issue here with these glues thatyou need to be aware of. they contain formaldehyde and that means
that you do not want to breathe the dust from the catalyst or thedust from the sanding after the glue is dried. so please, wear gloves, wear your eye protection and a respirator at all times when you'reworking with this glue. one of the great things about a 2-part glue like this is the fact that you can change the ratioto suit your needs.
you can use anywhere from a 3:1 ratio of resin to catalyst for a quicker cure to a 6:1 ratio for a slower cure. i'm going to use a 3:1 mixture here. and when scooping the powder, try to avoid disturbing it too much since we really don't want dust clouds of this stuff floating around the shop. another neat thing about unibond is that
you can order the catalystin different shades for lighter and darker woods and if you can't get theexact color you want, you can always add a little aniline dye to the mixture for a custom color. once the glue is evenly mixed, i pour a good amount on the substrate. an ink roller is perfectfor spreading the glue into a nice even layer.
now i do the same thingfor the veneer itself. and, of course, you would also veneer the other side of the substrate. one last thing you should know is that temperature plays a major role in this glue's ability to cure. warmer is better and never use it in temperatures less than 65 degrees. now it's really notnecessary for you to have
a bottle of every glueavailable in your shop. but when you start gettinginto specialized areas like veneering and thingslike bent lamination, you might find that certain glues just fit your needs better than the stuff that you use on a day to day basis. and urea resin glue is definitely one that you should consider. thanks for watching.