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WEST SYSTEM
#406 Colloidal Silica

406 Colloidal Silica is a thickening additive used to control the viscosity of WEST SYSTEM Epoxy and prevent epoxy runoff in vertical and overhead joints. 406 is a very strong filler that creates a smooth mixture, ideal for general bonding and filleting. It is also our most versatile filler. Often used in combination with other fillers, it can be used to improve strength, abrasion resistance, and consistency of fairing compounds, resulting in a tougher, smoother surface. Color—off-white.

Filler Selector Chart

Product Models
Description WM Model # MFG Part # Availability Price Quantity  
406 Colloidal Silica Filler, 1.7oz. 318402 406-2
In stock online.

$14.99

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406 Colloidal Silica Filler, 6oz. 323618 406-7
In stock online.

$29.99

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Product Description

406 Colloidal Silica is a thickening additive used to control the viscosity of WEST SYSTEM Epoxy and prevent epoxy runoff in vertical and overhead joints. 406 is a very strong filler that creates a smooth mixture, ideal for general bonding and filleting. It is also our most versatile filler. Often used in combination with other fillers, it can be used to improve strength, abrasion resistance, and consistency of fairing compounds, resulting in a tougher, smoother surface. Color—off-white.

Filler Selector Chart

Specs

REVIEW SNAPSHOT®

by PowerReviews
West System#406 Colloidal Silica
 
5.0

(based on 4 reviews)

Ratings Distribution

  • 5 Stars

     

    (4)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to use (3)

Cons

No Cons

Best Uses

No Best Uses
    • Reviewer Profile:
    • Casual/ recreational (3)

Reviewed by 4 customers

Displaying reviews 1-4

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5.0

project almost done

By dan

from san diego ca

About Me Casual/ Recreational

Verified Buyer

Pros

  • Easy to Use
  • Protects Well
  • Visually Pleasing
  • Weather Proof

Cons

    Best Uses

    • Outdoor

    Comments about #406 Colloidal Silica:

    as you can see transom almost done. silica has made it east to get good adherence and white pigment with sand ability.

    • Was this a gift?:
    • No
     
    5.0

    Tough stuff

    By Navy Davy

    from Portland, OR

    About Me Advanced

    Verified Buyer

    Pros

    • Easy to Use

    Cons

    • Messy

    Best Uses

    • Indoor
    • Quick Fix

    Comments about #406 Colloidal Silica:

    I am building a wooden boat and use this to scarf pieces of mahogany into longer lengths. In addition, I also attach oar lock pads. It is as hard as a rock when cured. While it is a better product than Cello-fil, Cello-fil is less messy (not as light).

    • Was this a gift?:
    • No

    (1 of 3 customers found this review helpful)

     
    5.0

    Gold Standard of Epoxy

    By Matt

    from NE Ohio

    About Me Casual/ Recreational

    Verified Buyer

    Pros

    • Easy to Use

    Cons

      Best Uses

        Comments about #406 Colloidal Silica:

        Mixes very easily; takes thickening agents well; forms a nice bond

        (4 of 4 customers found this review helpful)

         
        5.0

        Great Fillets

        By Matt

        from NE Ohio

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Makes great fillets

        Cons

        • Messy

        Best Uses

        • Boatbuilding

        Comments about #406 Colloidal Silica:

        It's a great way to make peanut butter with epoxy, but it gets airbourne amazingly easily, and requires wearing some sort of breathing filter.

        Displaying reviews 1-4

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