West System 207-SA Special Clear Epoxy Hardener | Non-Blush Finish

I used 207 hardener to seal both large and small cracks in live-edge slabs of spalted beech I was using to make table tops. At 70 degrees ambient temperature and about 40% humidity, 207 gave me a good hour of open working time (when mixed in small batches), which I found very helpful because I can be slow and fussy in my work. 207 hardener is absolutely clear and my table tops turned out just as I wanted.

I am impressed with it. I tried a few sample pieces of wood before using it on a real project so that I could get a good feel for working with it. This stuff is very clear and does not yellow in a short period of time. However, it is not UV resistant. Make sure you mix it with the 105 resin at an ambient air temperature of about 70+ degrees Fahrenheit to help prevent air bubbles from forming. It is OK if a few bubbles form since you can use a heat gun or torch to pull them out after you poor it on the surface. Heat gun is preferable. While it may be hard after 24 hours of applying it, it actually does not become fully hard until about 7 days later. It levels out very well. The final thickness ends up being about 1/16 to 3/32 of an inch. However, you can also spread it to a very thin layer with a squeegee if you want to use it as a base/sealer coat for finishing furniture. It fills in the wood grain pours nicely. I found it to work even better if you rub on a thin coat of polyurethane prior to applying the epoxy. This helps to prevent air bubbles from forming due to tiny air pockets in the wood. It does easily soak into end grain; so about two coats of polyurethane will be needed on the end grain to slow the absorption rate. The pumps they offer ( Mini Pump Kit for 301 and 305 in Quart, Gallon, 5 Gallon sizes ) are a great help to meter out the correct quantity of chemicals. However, the pumps do not necessarily work correctly at each pump action. Some of the pumping action will suck in air on the up stroke and prevent the pump from correctly metering the next output on the down stroke. Therefore, be attentive when using the pumps. The West System 207 hardener and 105 resin mix at a ratio of 3:1 For most projects, I used this kind of mixing cup ( 1/2 Pint Disposable Mixing Cups 100/Box ) since smaller cups can be too small, and I don't need large cups very often. This 207 hardener will not sick to these cups when fully hardened in them. Customer service at West System is excellent. I got a live person who referred me to a very knowledgeable representative in their office.

I am an avid West Systems user and recently purchased this clear hardener to coat the top of a live edge table. The results were stunning! As long as you have the pump systems to ensure your measuring is flawless, you can't go wrong. I highly recommend all West System epoxy products and I have all three hardeners that I use for various products (205, 206 and 207). Consistent and beautiful results.

I use West Systems epoxy on small aircraft, usually the regular slow 206/fast 205 hardeners that have yellow tints (which I don't love aesthetically but they are good so I deal with it). This is actually crystal clear when hard, and I've begun substituting it anywhere I would usually use the slow 206.

I primarily do wood working but have recently started wrapping some of the pieces of my projects in carbon fiber. I reached out to West directly to find out which product is best for what I am doing. 207 was it (combined with 105 resin). It mixes very easily, goes on smooth, flows well, and permeates the fabric without any issue at all. I was a little surprised at the pot time since it's far longer than i am used to. But that makes it even better when doing things like laminating composites since it gives you more time for adjustments. I really like it and I will continue using it for the foreseeable future.

I know this is a great product as I’ve used it for many years in the past, but when opening the can, it was only half full it’s expensive for what it is and it is worth the price but not when you’re only getting half the product that you paid for

I hate to leave a bad review but the hardener i purchased was no good... when I opened the can the hardener was dark brown. I've tried to use it four different times and the epoxy resin would never cure. The resin would stay sticky for days... I ended up using another can I purchased locally and the resin cured, so obviously the hardener was no good. Be aware of bad hardeners!

Great clear epoxy gardener. I've been using it for years. Both as a wood finish and as fiberglass binder over wood.

The product arrived quikly and works as advertised

Took a long time to get but it works

Kayak

Very easy to use with the pump system, rt. measure every time.

Was smaller then expected….