Penofin Oil Stain exterior wood finishing products on your wood projects to beautify and protect against fading, discoloration, mold and mildew. Penofin transparent exterior finishes were formulated to enhance and protect the natural beauty of wood and to prevent discoloration from the sun’s ultraviolet rays. Penofin resists stains and retards nail bleed. Penofin complies with all national and local air quality regulations.
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Penofin Blue has a small odor. This product is easy to apply and absorbs well into the wood. The initial appearance looks pretty good, but not great. The instructions stress wiping the stain after applying to reduce sticky finish. Even though the finish looks OK, who really wants to wipe their entire deck after staining? 14 month weathering results were the worst of anything we tested. Severe failure, graying, color loss and mildew growth were all terrible. 
- Easy to apply
- Penetrates well
- Initial application looks good
- Required to wipe stain
- Complete failure well before 14 months
- Extreme darkening
- Mold and mildew growth
- Slight odor
- Not eco-friendly
I applied the blue Penofin stain to my new deck last summer. This spring now the appearance is horrible. All kinds of gray coming through and Discoloration. It is so disconcerting because I worked so hard at it. Also, at $50 a gallon I didn’t receive the quality I thought I was. The original appearance was fantastic but did not last at all. The product will cause spontaneous combustion also. In the hot sun the sponge I was using actually started burning which was quite weird. Very volatile.
An excellent product and like all things that get a professional coating, the prep is 90% of how the finish is going to look,last, it’s consistency…
After 2 years of applying Penofin to my new deck I am having to scrub it all off because it did turn black. But the 2 years I had with it, my deck was beautiful. Yes, scrubbing with a pole brush is a hassle but it’s 100% easier than having to power sand an entire deck of blistered, chipped, peeling water based stains! That took me weeks to do in the hot sun. The finish of Penofin Oil is gorgeous for about a year. Just ok the 2nd year. Severely darkens after the 2 year mark. But hey….it only took me 1 day to strip it all off with a stiff nylon pole brush. Natural bristles don’t work BTW! Super stiff nylon only! So, essentially what it boils down to is this: do I power sand for days at a time on my knees every 3-4 years, or do I pole scrub with cleaners every 2 years for one day? That is indeed the question.