Arjay 2121 Polyester Brushable Radius Compound – 5 Gallon

Polyester Brushable Radius Compound


Perfect for creating void free parts with very little shrinkage between your gelcoat and skin laminate with little to no finish work. Incredible impact and crack resistance.


20 in stock

Brushable Radius Compound


In recent years boat builders increasingly have designed sharp radii and style lines into their models. The challenge on the floor becomes laminating those tight radii and not leaving air voids. Plus, this has to be done without creating other problems like gel coat cracks and “print” caused by heat and excessive resin shrinkage. Arjay’s Radius Compounds rise to these challenges by providing a tough, resilient, low shrink substrate between the gel coat and skin laminate that will allow you to produce void free parts that require little to no finish work.

Arjay 2121 Polyester Brushable Radius Compound Benefits:

  1. Lower exotherm and shrinkage for better finishes
  2. Reduces air voids and dry fibers in laminates
  3. Eliminates surface cracks and blemishes
  4. Maintains resiliency to resist cracks
  5. High impact resistance
  6. Requires MEK-P Catalyst (is not included). We recommend buying our 1 Quart MEK-P and then following the mixing directions.

PLEASE NOTE: This information is provided in good faith and correct to the best of our knowledge. No warranty, guarantee, or representation is made as to the sufficiency of the information for the safe use of the product, nor to relieve the end user of any Federal, State, or Local regulatory responsibility.


  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.”