Rot Doctor

[Miscellaneous Q&A Index]

Subject: CPES on top of an oil based stain?

Date: Monday, November 27, 2017

Would you happen to know if CPES* epoxy can be applied on top of an oil based stain? I was thinking of maybe doing this on the horizontal pieces on the top of my fence as a water repellent.


The answer is yes, it can, as long as you realize that like all epoxies CPES* will gradually turn a very light gray due to UV light exposure. The epoxy that goes into the wood is unaffected, although we would recommend that the application be repeated about every five years.


* This product is unavailable, we are selling comparable product the S-1™ Clear Penetrating Epoxy Sealer that will perform these same tasks. Feel free to contact us if you need assistance with which products to use or have additional questions.

[Miscellaneous Q&A Index]

Have questions?

Contact us by phone 206-364-2155 or e-mail (send us your pictures) at and we will gladly answer questions about our products or how to apply them. With 20+ years of experience and many more in the boating and construction industries, not much surprises us. We are here to help our customers solve their issues. Let us help you to not have any surprises in your repair project.

Our business hours are 6:30 AM to 5:30 PM Pacific Time, Monday–Friday.
Tech support is available over weekends and holidays 8:30 AM to 5:30 PM Pacific Time.

The Rot Doctor, Inc.
P.O. Box 30612, Seattle, WA 98113
Voice: 206.364.2155    Fax: 206.364.4744    E-mail:
The Rot Doctor, Inc. ©1997–2021. All rights reserved.