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Product Details

West System 407 Low-Density filler is a blended microballoon-based filler used to make fairing putties that sands smooth. Reasonably strong on a strength-to-weight basis. Use to thicken epoxy resin into a “peanut butter” consistency to easily fair, carve, and strengthen. Cures to a dark red/brown color. Compatible with WEST SYSTEMS epoxy and hardeners. This fairing filler is available in 4 oz, 12 oz, and 14 lb containers.

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Overall Rating

4.8

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Filter Reviews

1 to 3 of 6 Reviews
1 – 3 of 6 Reviews
Central Illinois
4 out of 5 stars.

Use on airplane canopy fairing ...

13 years ago
I used this to achieve final contours on the front edge fairing of an airplane canopy. It worked VERY well ... mixes well, easy to smooth into minor surface irregularities, and sands more readily than microballoons.
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Lake Norman, NC.
5 out of 5 stars.

Fine Light Weight Filler

13 years ago
Use in places you want to fair. I used this on fiberglass boats above and below the waterline. This wets out well and adheres well. It is a bit harder than 410 but spreads out to really fine edge. You can mix any of the West System fillers to get just the right mix you need any job.
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St. John, Virgin Islands
5 out of 5 stars.

Been using it for years, works great!

14 years ago
Use it on my boat. Great color and holding power for wooden boats
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3 Ratings-Only Reviews

Questions

1 - 5 of 5 Questions

Q: I am in the process of laminating 2 layers of 3mm okoume ply on the bottom of a restoration project. Can I use 407 in between the laminated layers?

7 years ago
1 Answer

A: The 407 filler is better for a fillet, i'd recommend the 403 Microfibers which are best for adhesive properties.

7 years ago
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Q: can the #407 filler be mixed with Polyester resin to be used as a fairing compound?

11 years ago
5 Answers

A: Gordon, Thank you Very much, Tom

11 years ago
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Q: I'm in the process of repairing and fairing blisters on my sailboat. I ground out the blisters 5 months ago and let the bottom dry out thoroughly. Today began sealing the holes with West system epoxy not realizing that I'm supposed to apply thickened filler while the epoxy is still in the __quote__gel__quote__ stage. I need to order Wet 407 or 410 then go over the holes I just sealed with the thickened mixture to fair the hull. Since by then the layer I just applied will be fully cured, do I need to grind out the blisters again of can I just re-apply epoxy the fill with thickened mixture while this application is still in the gel stage?

12 years ago
8 Answers

A: David You should consult directly with the folks at West about this. They are very helpful. My guess is if the first layer is fully cured you may be able to wash it and just lightly sand it before applying the 2nd coat. I hope that is helpful. Mark

12 years ago
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Q: Can this be used as a conductive mixture in harsh environments?

13 years ago
1 Answer

A: Sorry, unable to help---have not yet used the product.

13 years ago
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Q: I just finished a 7 year restoration of my 79 CVX20. The bottom has a 3/16__quote__ hook. I don't want to flip it for repair. What materials should I use? About 30 years ago I repaired a lot worse hook with fiberglass matt. Surely, someone has a method that is easier than that.

12 years ago
0 Answers
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