Darryl Keil
Posts: 1455
Joined: 2003-05-22
Location: Maine
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There are two answers to this question. The most immediate answer is to use the Unibond Blocker. Even though its main purpose is to stop bleed through it does thicken the resin up a bit. If you have shell flour available, (ground up pecan or walnut shells) this will do the job as well. Just dont over do it, as too much will inhibit penetration.
The other approach is time. Unibond 800 thickens on its own given some time. When Unibond 800 is ultra fresh the viscosity is a little thinner. Actually the old version was just as thin when very fresh but it was made in very large batches so most customers were getting it after it was the viscosity you were familiar with. Because the new Unibond 800 is ultra low formaldehyde which means a shorter shelf life, (formaldehyde being a great preservative) we make it in much much smaller batches so its reaching everyone very fresh, hence the viscosity you see. If you wait a couple of months it will become just about the same as the old stuff.
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