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Seacast™ is a synthetic material made from a mix of proprietary ingredients and recycled fiberglass fibers. Seacast™ uses chopped reinforcement recycled fiberglass that provides superior tensile strength in comparison to ceramic spheres. The materials found in Seacast™ are based on the same ones found in the rest of the boat and the hull.

Seacast™ acts and responds like wood but is a superior material. It is made of 35% FRP composite, which contributes to its super strong impact resistance. Seacast™ is lighter then marine plywood but won’t change the balance of your boat and does not absorb water.

When Seascast™ is used in Transom repairs it is completely drillable and tappable like wood but will not crack, creep, rot or freeze at any temperature. In seventeen years we have never had a cracked or broken transom, even with the more powerful motors hung on some transoms.



Structural Composites, Inc has completed flexural testing on the three laminate panels that were provided to them. The results are summarized below.

Panel ID      Catalyst      Flex Strength      Flex Modulus      Max Load
M panel          BPO             17641 psi           845039 psi        6443 lb  Current Seacast™ formula
L panel          MEKP           17290 psi           903762 psi        6053 lb  Old Seacast™ formula
Wood              none            10204 psi           1005342 psi      3598 lb  Marine Plywood



For The Do-it Yourself Boater Purchase Seacast™ Today For The Low Cost of $232.95 plus s+h, & tax for MI res. for a 5 Gallon Seacast™ Kit. The Kit Includes:

  • 5 Gallons of Seacast™
  • Two 2.75 oz Tubes
  • One 1 oz Tube of BPO Catalyst
  • 7lbs of reground fiberglass.

If you would like to become a reseller or own a marine repair service please contact Jeff at (989) 754-3341 for wholesale pricing.

"We add class to our fiberglass"

Call (989) 754-3341 for details