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Part# 09-04210
MFR Model# 2-PBU4


A pink translucent, 1 part air drying resin used for the first 2 or 3 coats to penetrate and seal the fabric weave and assure good adhesion. Also used to attach the finishing tapes and reinforcing patches. Brush on initial coat thinned 3:1 with reducer. Subsequent coats are thinned 3:1 with reducer and applied with a spray gun to avoid brush marks & cut application time.
Available in tinted or untinted and in quart, gallon, or 5 gallon sized.

Important Notice: All mixed paints are special order and are non-returnable.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


I never did like the pink and with the untended. I can leave it clear or I can tint it with the polytone color I want.

Steven W Verified Purchase


October 11, 2023

good stuff

Gary H
January 4, 2021

Good product. Tried and true.

Rich C
November 20, 2020

I had a leaking can of Polybrush delivered and contacted customer support . They had a new can at my door in 4 days no charge . It was the first time in over 40 years of doing business with you that I had a problem ... Thanks , Ed

Edward S
August 17, 2020

great service box got here in great condition fast service

Jack B
January 10, 2020

First of all, I use this on model planes (R/C) using the lite Stits fabric. This is NOT the same stuff sold by F&M. Their Poly-Brush is already thinned, since they sell to modelers. Spruce sells the full-strength stuff that you have to thin (with reducer-I used RR8500-slow drying but the finish is smoooooth!) )on your own. You need to thin it 3 to 1 or else it goes on too thick and it orange peels. But, once you thin it, its just perfect! So, you may actually be getting more product for the money with this than with the pre-mix stuff.

Bruce C
October 31, 2019

I have used this product on a recent cover job and it did what it was supposed to do. Dont forget to thin 3:1 with their reducer. I like the poly-fiber system, just were a paint mask when working with it.

February 27, 2018

The first gallon of poly brush was damaged in shipping and leaked in the carton. When we notified Aircraft Spruce of the problem they sent me a replacement gallon. I appreciate there service for taking care of this issue.

Don L
August 21, 2020

Works good, came fast and was well packaged. Hazardous shipping is brutal though.

January 18, 2019

This stuff is great, makes a tough, attractive and nearly fireproof finished product, but it is toxic as heck so use protective equipment ALL THE TIME.

December 19, 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: In what colors is Poly Brush available? I see it is tinted.

Only available in clear or tinted. The tinted is only sold in a pinkish color.

Q: What is the shelf life of Poly tone, poly brush and the reducers?

Each of these products have a 4 year shelf life in closed containers.

Q: When you mention 3:1 reduced do you mean 3 parts PolyBrush to 1 part reducer ? Also, what is the recommended reducer for this product ? MEK ?

Poly Brush is thinned 3 parts Poly Brush to one part reducer. There are two reducers available. R65-75 for applying it in lower temps, and RR8500 for applying it in higher temp environments. MEK can be used for cleaning surfaces and spray equipment.

Q: Will Polyspray adhere to a standard etch primer on Aluminium please?

Poly-spray is intended for use on fabric. I don't believe it will adhere to metals.

Q: Can West Systems epoxy be used as a primer when applying this product to wood?

This is designed to be applied directly to fabric. We do not have any data supporting it's use with epoxied wood.

Q: How many square feet does 3 gallons of poly brush and 1 gallon of reducer cover if you only apply one coat?

The Poly-Brush states that it will cover approximately 150 sq feet per gallon.

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