![]() ![]() Gorilla glue is not available here as far as I am aware and the jig you have sounds like a Veritas honing jig, a lot of us have them and swear by them, they do a damned good job. Their is no need to spray water on - timber has enough moisture to cure any PUĬross linked describes the action of the glue, it means that it forms into 'strands' and forms a web with the strands feeding through each other, all of this is a microscopic process so don't look for it happening, it will be just a yellow gloop on a piece of wood to the naked eye. PU are very good - though they bond in a different way they dont soak into the fibres however they form a really strong bond that is water resistant but the isocyanates in it can cause health problems, and the bonds are very rigid. A D4 product 9usually a 2 part system' has an extra resin in making it resistant to high temperature and water though for most appliaction is overkill.Īll PVA's will generally give you the same strength bond, in al the testing i have done their is little difference between one and another, the only difference is the solids content - some have more water than others but besides that their really is little to choose except good marketing A D3 or 'cross limked' PVA will soften in water but not dissolve, meaning in humid conditions or on damp timber will not release. Standard PVA ' such as regular aquadhere' are D2, that means non cross linked and if you dried a film out and put it in water would re-emulsify. the D rating describes how water and heat resistant an adhesive it. Most PVA's of one D rating will perform to the same as another. PVA's on the other hand are very mobile molecules and are easily absorbed into the wood structure which is why when they are clamped together give a stronger than timber bond. Everyone it correct, dont use liquid nails, the primary design for this is wall panelling and joist - flooring bonding, it is not designed for joinery because its too soft and flexible, anything that has stress on and it will give, especially at elevated temperatures (as its a synthetic rubber base) I work as an adhesive chemist for one of the largest suppliers in the world of adhesives. I scraped the M & T joints added pocket screws as backup and Gorilla Glued them together and they held this season's continuous rain. However, I did have a flat panel shed door fail last spring (year ago) the severe winter storms had soaked the wood and the glue (Titebond III) failed with the first good wind storm. If you are worried about weather conditions or course surface or grainy woods, then select Polyurethan glue (I prefer Gorilla Glue) as it expands as it sets and forces its way into the pores and crevices of the wood, filling loose joints and cracks, it also is weather resistant.Īgain if weather is a concern the Titebond III is suppose to weather all the storms. ![]() PVA will ooze into the fibers of the wood snd when it sets, it is an interlocking agent that not only hardens to a surface bond but interlocks to the cells. It is not suited for any joinery as it skims over quickly and thus reduces the bonding ability. Liquid nails is a construction adhesive and in such is a surface bonding agent. ![]()
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