West System 406-7 Collodial Silica 5.5oz, off-white

Great filler from west system A++++++

This stuff works great!! It’s not easy to mix into the epoxy, it’s so insanely light, it just floats away if you’re not very very careful!! Add a little at a time, mix inside a garage or somewhere the wind can’t get to the mixing bowl. Once it’s mixed in, it does a great job thickening up the epoxy. Great for vertical surfaces as it really holds upright well once mixed to the proper thickness.

I’ve used West Systems for probably 50 years. After the initial learning curve, it’s hard to use anything else. I use 406 on a majority of my glue joints. Measure it out into cut-down McDonalds cups using a gram scale for as little as 6 grams or for how many grams your container can hold. It makes a self-filling, durable joint in so many applications. Add as much 406 to epoxy for the thickness you need to make super strong joints.

Worked exactly as expected and mixed well for my project. Reliable product and easy to use.

Works well for fairing, very strong