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Randolph Universal Retarder

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Overview

This retarder is excellent for use with nitrate dope, butyrate dope, or Randacryl. Recommended for use when blush occurs. Flammable.
Available in quart, gallon, and 5 gallon sized.
   
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Reviews

Makes finishing model airplanes in a humid environment much more enjoyable. Blushing can be frustrating, and this fixes that. Great product.

Shawn W Verified Purchase

RANDOLPH Y-9910 UNIVERSAL RETARDER QUART

October 3, 2023

Randolph retarder works just great

John S Verified Purchase

RANDOLPH Y-9910 UNIVERSAL RETARDER QUART

August 15, 2023

worked very well with the paint.

George E Verified Purchase

RANDOLPH Y-9910 UNIVERSAL RETARDER QUART

August 9, 2023

The Randolph dope retarder additive works great like all of the other Randolph products, plus shipping is fast with Aircraft Spruce.

Richard C Verified Purchase

RANDOLPH Y-9910 UNIVERSAL RETARDER QUART

March 8, 2022

Good 👍🏻

Lawrence W Verified Purchase

RANDOLPH Y-9910 UNIVERSAL RETARDER QUART

September 25, 2021

Using Randolph products to paint a 1/4 scale RC Clipped Wing Cub and Im very satisfied with the products.

David Z Verified Purchase

RANDOLPH Y-9910 UNIVERSAL RETARDER GALLON

September 3, 2021

Retarder is used to prevent dope blushing on humid days, but it is also great to slow drying down on hot days. I used 25% with the color dope and found my wet edge lasted long enough to completely paint a fuselage and my wet edge remained as I progressed from one side to the other with no overspray showing anywhere! Just added a new trick to my book of painting tricks! JJ Sinclair

Jj G
November 14, 2020

Works to eliminate blushing in high humidity conditions. Also increases gloss and leveling.

Leigh J
September 25, 2020

I was having blushing in the color coats and clear coats. I added an ounce of retarder to the clear and the blushing is gone. South Louisiana is very humid in the summer.

Perry R
August 28, 2020

great

Corky L
June 12, 2020

Q&A

Please note, Pilotshop.com'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. Pilotshop.com 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: Can Randolph Universal Retarder be used with Ranthane finish coatings? At what rate?

No, The universal retarder is for nitrate and butyrate dopes, and Ranthane is a polyurethane base paint.