West System 404 High Density Filler
WEST System West System epoxy
  • West System 404 High Density Filler

WEST System 404 High Density Filler

West System 404 High-Density filler is an epoxy thickening additive developed for maximum physical properties in hardware bonding where high-cyclic loads are anticipated. 404 can also be used for filleting and gap filling where maximum strength is necessary. Color: off-white.
 
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$34.64
$248.95
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Tech Spec Product Info User Generated Content
BRAND: WEST System
Type: Fillers
4.5 6

REVIEW SNAPSHOT®

by PowerReviews
WEST System 404 High Density Filler
 
4.5

(based on 6 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to use (5)
  • Weather proof (3)

Cons

    Best Uses

    • Outdoors (4)
    • Indoor (3)
    • Quick fix (3)
      • Reviewer Profile:
      • Beginner (3)

    Reviewed by 6 customers

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    Displaying reviews 1-6

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    5.0

    404 High Density

    By GUSTAVOG

    from Mayaguez, PR

    About Me Beginner

    Verified Buyer
    Ensign

    Pros

    • Easy to Use
    • Protects Well
    • Weather Proof

    Cons

    • Messy

    Best Uses

    • Indoor
    • Outdoor

    Comments about WEST System 404 High Density Filler:

    I used it for re- enforcing a composite fiber glass and aramid honeycomb panel. I needed a syringe in order to insert it into the panel. It does the job.

    • Was this a gift?:
    • No

    (1 of 1 customers found this review helpful)

     
    5.0

    Excellent thickener for high-strength

    By Peter Aleff

    from Vineland, New Jersey

    About Me Advanced

    Verified Reviewer

    Pros

    • Easy to Use

    Cons

      Best Uses

        Comments about WEST System 404 High Density Filler:

        I have used this 404 high-density filler for over a quarter century both as a thickener and gap filler and whenever a bond had to withstand structural stresses. I had previously used sawdust for those filler applications but switched to the 404 fibers despite their much higher cost because they are finer and produce a smoother surface. The 404 fibers are also great for making strong fillets. You can easily form those fillets as smooth as if they were sanded: when the epoxy is no longer runny but before it sets completely, put a gob of hand soap or lotion on your fingertip and run it over the fillet to give it the shape you want -- the lotion keeps it from sticking to your finger, and you can easily wipe that lotion off the fillet after the epoxy is cured.

         
        4.0

        Good Product

        By Captain

        from Wayne, PA

        About Me Beginner

        Verified Reviewer

        Pros

        • Easy to Use
        • Visually Pleasing

        Cons

        • Start with small batch

        Best Uses

        • Indoor
        • Outdoor
        • Quick Fix
        • Wood Trim

        Comments about WEST System 404 High Density Filler:

        I am completely new to The West System Products. I purchsed the starter kit with Hardener and Resins, plus fiberglass and was extremely pleased.
        The project needed some filling in of gaps so I purchased the 404 High Density Filler. In the end it worked perfectly. My only suggestion would be to start with small batches as you learn how to work with the product. It sanded easily and was just what I needed.

         
        5.0

        Excellent Additive

        By Butch Wood, Esq.

        from Francestown, N.H.

        About Me Competitive

        Verified Reviewer

        Pros

        • Easy to Use
        • Weather Proof

        Cons

          Best Uses

          • Outdoor
          • Quick Fix
          • Wood Trim

          Comments about WEST System 404 High Density Filler:

          Blended well (used heavy concentration as application was on a vertical surface...no sag) and set rock hard. Coarser surface than other fillers...harder sanding. Next time I'd spread a bit less, leaving 1/4" or so to dress with another epoxy layet with fairing cmpd blend...easier to sand and smoother top coat.

          (3 of 3 customers found this review helpful)

           
          4.0

          Transom and stringer replacement

          By Bucket builder

          from Warwick,R.I.

          About Me Beginner

          Pros

          • Easy to Use
          • Protects Well
          • Weather Proof

          Cons

          • Messy

          Best Uses

          • Indoor
          • Outdoor
          • Quick Fix

          Comments about WEST System 404 High Density Filler:

          We used this filler with 105 resin 206 hardener and 404 filler for laminating,filleting and glassing.I like this filler better than the 404 because it is easier to mix.

            (1 of 2 customers found this review helpful)

             
            4.0

            The strongest of the epoxy fillers

            By Jeff

            from Gales Ferry, CT

            About Me Competitive

            Staff Reviewer

            Pros

            • Good adhesive
            • Strong

            Cons

            • None

            Best Uses

            • Fiberglass Repair
            • Hardware bonding

            Comments about WEST System 404 High Density Filler:

            404 is the strongest of the adhesive fillers- it is also difficult to sand but that is not a negative when used properly. 404 makes a very hard and stiff fillet.

            Displaying reviews 1-6

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