What is a PU gel wood glue?

WHAT IS PU GEL WOOD ADHESIVE?

PU gel wood adhesives are very similar to liquid PU wood adhesives but are thicker (thixotropic) versions so ideal for applications which a liquid PU isn't suitable, e.g. vertical surfaces.  Like liquid PU's they are commonly used for bonding timber because of their excellent water resistance, and bond strength.  Gel PU wood adhesives are normally packed in a silicone type cartridge and extruded in beads using a silicone gun.   PU adhesives will bond most wood and timber types and will also bond other materials, e.g. cementitious, plastics, fibreglass, insulation etc, in marine, construction and manufacturing applications.

WHAT IS THE BEST PU GEL WOOD GLUE?

If the adhesive is PU based (polyurethane) then by its very nature it is likely to be a good product.  Common brands include Gorilla glue, Lumberjack, Bison Timbermax and many other brands.  Woodstikk PU Gel and Woodsikk PU Rapid Gel are a couple of different grades we have in our range.  Polyurethane chemistry is used in many markets for making all sorts of things in every day life.  It is a very flexible system in the sense you can tweak it to be hard, soft, fast curing, slow curing, single component, two components, etc.

IS PU GEL WOOD ADHESIVE WATERPROOF?

It is likely that all PU wood adhesives are waterproof as the bond line it creates is so strong and durable.  The common PU wood adhesives comply with the D4 water resistance requirements, which effectively means that it is waterproof.  More information on the different classifications (D1, D2, D3, D4) can be found here.

IS PU GEL WOOD GLUE GAP FILLING?

Yes it is.  As it reacts with moisture in the air and on the substrate, a chemical reaction takes place meaning the adhesive will start bubbling up.  It is the same base as the common builders expanding, or filler foam, but thankfully doesn’t expand that much.  It also doesn't expand as much as the liquid PU glues so if you want a minimal expansion then this is a good choice.  So always protect your hands, body and workpiece before applying it.

HOW DO I CLEAN PU GEL WOOD GLUE?

Unfortunately, PU adhesive is difficult to clean.  Many users will have made the mistake of getting PU glue on their hands and it stays there for days!  We would recommend that you use gloves and skin protection when using PU so that you don’t have this problem, as there aren’t many cleaners that we know of which effectively remove the residue.

Similarly, PU adhesive is difficult to get off substrates once it has cured.  Really, the only effective way to remove overspill is to sand it off or chip it off.  When producing your work, allow for the fact that you are likely to have to sand back to remove the overspill.  You could protect the workpiece using a non-paper based masking tape.

HOW DO I USE PU GEL WOOD ADHESIVE?

PU Gel wood glues are applied by a manual, pneumatic or battery powered silicone guns as they are supplied in cartridges.  ,

WATCH HOW TO USE PU WOOD ADHESIVE