Part# 09-05625
MFR Model# 8-420W3


This white heavy duty chemical and solvent resistant amine cured primer from Stits is fast drying and corrosion inhibiting. It can be applied and cured to temperatures down to 35F. Mixing ratio is 2 parts base, 1 part catalyst. Catalyst not included. See Accesories. Epoxy Primer available in quart and gallon sized.

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

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.

Reference Chart


Base: Quart 09-05625
Base: Gallon 09-05630
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Good primer

Mike L Verified Purchase


November 16, 2021

Great, only thing we use over fabric or metal. Makes colors more vibrant.

Aerodynamic C
July 27, 2019

Great primer for steel tubing frames, Im painting it on with a 1 brush. Its just right for painting on with out solvent added and has pretty good working time in small batches and even rolls on well (but not foam rollers it melts them). It covers very well but will probably require a second coat in some places.

Jaffe L
May 25, 2019

This is a great paint to shoot on any 4230 tubing super structure. Lee

November 11, 2018


Please note, Pilotshop'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 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: Is the Stits EP-420 primer roll on or spray type?

For best results, we recommend to spray it on, but it can be rolled.

Q: Will fabric cement affect EP-420? Can I glue directly on to the EP-420 coated part? Can EP-420 be applied directly to clean bare metal tubing?

Poly Tak fabric cement will not affect EP-420 epoxy primer. EP-420 can be used on clean bare metal tubing.

Q: Is this Stits EP-420 a gloss, semi-gloss, or satin finish?

Per the vendor its between a semi-gloss and a satin. You would have to scuff it before applying a paint coat on top.

Q: Can you use this and then top coat after it flashes over (wet on wet)?

If you are using poly-tone, then yes you can spray it on when the ep-420 is tacky.