FGCI General Purpose Polyester Putty

General Purpose Putty Filler Kit


If you plan on using our General Purpose Resin, you want to make sure you are using the same quality of putty and filler. This works seamlessly with our other ortho based products to produce a consistent final product.

Includes MEKP catalyst!

*For Drum Quantities – please contact us via our Contact Us page. 


Economical General Purpose Putty Filler


Our Economical General Purpose Putty Filler is a standard within the marine industry for small to medium sized boat manufacturers as an all around workhorse. 


With FGCI, you can rest assured that your batch will be within specs every time, with the same color, viscosity, strength and application characteristics as you would expect from a high quality product. After all, we haven’t been in business for over 60 years without ensuring our quality standards are the highest, and accompanied with the best customer service! 


FGCI’s GP Polyester Putty Offers:

  1. High AFFORDABILITY for above and below waterline!
  2. Compatibility with our General Purpose Resin!
  3. Easily sanding for a smooth finished surface
  4. Great water resistance!
  5. Great Flexural Strength for material stability!
  6. Great Tensile Strength, close to competitor’s Isophthalic putties!
Catalyst Concentration Chart - Resins and Gelcoat

Surface must be clean and dry. Roughen with coarse sandpaper for best adhesion.

Remove any paint, rust, or scale.

Add 2% MEK-P by weight and mix thoroughly.

Smooth on putty working well into pores. Where holes go all the way through, extend putty beyond damaged area for greater strength.


  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.”