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Part# 09-04500
MFR Model# 2-PS


A high-solids aluminum-pigmented, 1 part, air drying resin used after the Poly-Brush preliminary coating to protect the fabric from UV and prepare for a smooth finish. Thin 4:1. Available in quart, gallon, and 5 gallon sized.

Important Notice: All mixed paints are special order and are non-returnable.


Poly fiber products is a great way to cover an aircraft. Right very easy to work with and forgiving. 10 years ago I built my plane using poly fiber. A recent had an off-field landing and had to repair a wing and the fuselage. I am very glad I used poly fiber product. Repair went perfect. You cant tell where there was damage at all . Poly fiber product is so easy to work with and repair any future damage that may happen. Thanks for a great product!.

James R Verified Purchase


July 24, 2022

It was white

Bob G Verified Purchase


May 24, 2022

Stephen S Verified Purchase


October 29, 2021

Jim E Verified Purchase


October 27, 2021

Haven’t tried yet

Stephen S Verified Purchase


June 19, 2021

Poly Fiber products very easy to use Ranthane finish looks good but is impossible to make a good looking repair. I was foolish to think I would never need to repair. Wind storm changed that thought.

Coy W
November 9, 2020

Best of the best. Provides a great UV protection and a smooth undercoating for any paint!

July 2, 2020

On time as quoted. Good product.

Bill M
June 2, 2020

great product I have been using it for years

Jack B
February 9, 2020

delivered and received in good condition

Gsm A
March 12, 2018


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: What do you use to thin the poly-spray with?

Per the Poly Fiber How To manual, there are two reducers to choose from, R65-75 or RR8500. They are offered in quarts, gallons or 5G pails, and are listed as "Accessories" on this web page.

Q: Is this poly spray also a primer or do I still need to prime the fabric before I paint with either poly tone or aerothane?

Per Vendor, you would need to:

Step 1: Poly-Brush

Step 2: Poly-Spray

Step 3: Poly-Tone or Aerothane

Q: Is it ok to skip this UV protectant before painting with Aerothane? Bought a plane that previous owner said they skipped the UV stage to save money...

Per Poly Fiber, we do not recommend skipping this. It would be at your own risk.

Q: Can Poly Spray be used on aluminum as a primer for Poly Tone?

No you would want to use EP-420 epoxy primer. Poly Tone is not designed to be used on metal. Poly Fibers Aerothane or Mark II base paints are used on metals, over the EP-420 epoxy primer.

Q: What is the surface that can be covered with 1 quart of poly fiber poly-spray part# 09-04400?

Per the poly fiber how to manual, one gallon of poly-spray will cover 200 sq ft, so a quart should over 50 square feet. This is for one coat of material.

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