TotalBoat Penetrating Epoxy Kits
EZ Fillet Wood Flour Putty, System Three wood flour putty
System Three System Three
  • EZ Fillet Wood Flour Putty, System Three wood flour putty

System Three EZ Fillet Wood Flour Putty

EZ Fillet is a wood flour two-part putty designed for stitch-and-glue wooden boat construction. Can be measured by volume or weight. The resin (part A) is red in color while the hardener (part B) is a deep, dark green. When completely and properly mixed, a rich brown wood tone results. After mixing, putty thickens to form an easy to spread compound, which stays put and will not run or sag.

EZ Fillet can be used by itself to create smooth cosmetic fillets or as a structural fillet when combined with fiberglass cloth and may be applied by spatula or caulking tube. A convenient pastry bag technique can be used by snipping off the corner of a plastic food storage bag and filling it with mixed EZ Fillet. Adjust size of the hole to deliver the right amount of EZ Fillet. Designed for both cosmetic and structural fillets in stitch- and-glue wooden boat construction.

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Tech Spec Product Info User Generated Content


  • Mix Ratio by Volume: 100:50
  • Mix Ratio By Weight: 100:44
  • Total Solids: 100 percent
  • Mixed Viscosity: 70,000 cps
  • Mixed Color: Red-Brown
  • Coverage at 1.5 mm: 25 square ft/Gal
  • Pot Life at 77 degrees F: 60 Minutes
  • Tack Free time at 77 degrees F: 6 Hours


Use protective gloves when working with this product. Use soap and water or white vinegar to get it off of your hands. Use Denatured Alcohol to clean off your tools.

BRAND: System Three
Type: Fillers
Usage: Woodrot
4.0 4

Good product but expensive


The idea of a self mixing adhesive is great and it worked as advertised - getting into tight spaces and sticking to surfaces to creating a great bond. My only issue is the packaging and price. Looking at the normal size tube in the product description, you would expect it the tube be full but - it isn't. It is only half full. I know the product description states just over 6 oz but that doesn't translate in the photo. Its sort of like seeing a big cereal box at the grocery store only to open it and see it is only half full.The half full tube combined with the high price of this product - $20 on average makes - it pretty expensive at over $3 per working ounce.After my two tubes quickly ran out, I had to go back to making my own.


Chapel Hill, NC


EZ to Mix EZ to Use


Easy to mix and use. Fills gaps small or large. Sets up up strong and weatherproof.

Jack of All Trades - Master of None

Northeast, USA

excellent product


Mix the two components and off you go; no trying to judge the 'slump', or fooling with silica (potentially hazardous) or chopped fiberglas (ditto). S3 has done all of that for you, and wood flour is fine under biaxial tape for structural fillets. A beautiful smooth cosmetic fillet will result if you wait an hour or so, and then wipe it down with lacquer thinner on a fingertip. I've gotten all the s3 epoxy products on my skin daily for the last 5 years and had no allergic or other problems.

stephen, boatbuilder

sawyer, mi


System Three EZ Wood flour putty


Easy to work with, but color was light brown, not the dark brown described in the literature.Otherwise it did a good job repairing a damaged wood railing.


New Jersey


System Three EZ Fillet Wood Flour Putty



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