FGCI Gelcoat Putty Repair Kit

Gelcoat Repair

If you’ve ever worried about a scratch, ding or crack, with our White Gelcoat Repair Putty, there’s no need to fret anymore. Easily repair the issue at home and save tons of money skipping the repair shop!


Gelcoat Putty Repair Kit

FGCI’s Gelcoat Putty Repair Kit is the best fiberglass repair putty on the market. Effortlessly sandible, easy to apply and economical to buy. Forget about those dings, gouges and scratches on your boat, and painlessly repair that gelcoat at home with our gelcoat putty repair kit! This product requires MEK-P (included with the putty) mixed at 1.5% for best results with a gel time of around 10-15 minutes at room temperature.

Catalyst Concentration Chart - Resins and Gelcoat

Gelcoat Repair Instructions

  1. Ensure the surface is clean and dry.
  2. Rough up any gouges or cracks to ensure a good surface adhesion.
  3. Gelcoat repair putty is mixed at 1-1/2% putty to MEK-P by volume, so measure out the amount of catalyst you need from the Catalyst Chart and fold the catalyst into the putty. Always mix small amounts of putty to ensure you have enough working time. Mix for 3 minutes.
  4. Once thoroughly mixed with MEK-P, use a putty knife and a trowel to properly apply the putty into any cracks or gouges. Apply the material larger than the repair and higher than the surrounding surface.
  5. Gel time is roughly 10-15 minutes at 77 degrees. Thin film setup is 1-3 hours, with a full cure being 12-24 hours.
  6. Once cured, sand flat for best results.


  1. Charlie Norris

    “I love fiberglass coatings. They have great products and excellent advice. I'm trying to open a boat repair shop in St . Mary's, GA and my supply WILL come from fiberglass coatings. When I lived in the Fl. Keys for 36 years and worked for a towing and salvage Co for 15 years all our supplies came from Fiberglass coatings. Great service and never were disappointed. Keep up the great job everyone.”
  2. Brian Lewis

    “The staff are very knowledgeable and friendly Have always gotten the right stuff for the right job. Pat,mark,Colby,Ryan your the best. Pat is the walking encyclopedia of FGCI.”
  3. Justin Lammers

    “Been working on a skiff project and using all FGCI products. They came highly recommended by my friends who are boat builders. It is the highest quality resins, glass, and gelcoat for the money. They made it really easy for a newer person to boat building. The customer service is phenomenal and they are always knowledgeable and ready to help with any questions I had.”
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