System Three Silica Thickener, 5 Qt Tub, White

This material works great for stiffening the epoxy resin. I used it to fill holes where a kicker was mounted through the transom and to fill holes on the vertical.

I find this stuff works great mixed with some Max Bond epoxy. Mix up the epoxy according to the directions and add some of this stuff until its like peanut butter and it makes a glue that, as far as I can tell, never comes apart. Add a little wood flour to the mix and you get a nice filler material too. This stuff is pretty particularized so its best if you use it outside or at least in a garage with the doors open. Not sure what happens if you breathe it in but I'm sure its not a good idea. If you are outside be careful, a good breeze will empty the bucket for you and it'll all be gone. Great product.

Building a mini tugboat. This filler thickens up epoxy resin very quickly. Seems to require a smaller amount than other fillers that I have used. When teh epocy cures, it makes for a very hard surface.

Good

As mentioned by other reviewers, this product arrived filled with large and small clumps. It must be passed through a sieve prior to use, which is a bit of a mess. Once it's been sieved and broken down, it works just like you'd expect it to. For the price I would buy this again and deal with running it through a sieve, rather than pay the huge mark up on West Systems and other brands of fumed silica. Good value, just requires a bit of prep before use.

good quality, good price. i use for filling small areas, and fillets. make sure to mix well with resin before adding mekp.

Use this with their microglass beads and it's much cheaper than most fillers. Sands easily if you mix it to peanut butter consistency. I used with WestSystems 105. Great fairing compound. Downside is that you have to mix two different powders which takes a few more seconds.

To expensive for what you get

Used for epoxy thicker filler, works very well

Only issue was some of the lumps were a pain to get mixed in. But it worked well and I only had a single exotherm due to the trying to get a few stubborn mixed in. It was a very hot day, so that didn't help either.