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TWP 1500 Series Stain Review3.97/5(6)

TWP 1500 Series Deck Stain

TWP 1500 Series Deck Stain

TWP 1500 Series was introduced in the Summer of 2010 as the replacement for the TWP 500 Series. TWP 1500 stain is a semi-transparent oil based wood preservative registered by the EPA. The only deck preservative that is currently registered as an exterior wood preservative.

TWP 1500 Series is designed for all exterior unfinished wood. It has excellent UV resistance from graying. It is mostly used for exterior wood decking, wood fencing, log homes, cedar sided homes, etc. TWP 1500 comes in 10 colors that allow the natural grain of the wood to show through.

TWP 1500 Series Deck Stain Scores (1-10)

Appearance After Initial Stain Application: 8.5

- TWP 1500 Series had a beautiful rich look to the wood. Wood grain was highlighted naturally. 1501 Cedartone color was slightly brown for a traditional cedar color.

Preventing UV Graying at 2 Year Mark: 9

- Excellent at preventing uv graying at the two year mark. One of the top stains that we have tested in terms of absorbing the UV radiation that causes oxidation of the wood.

Wear/Tear and Peeling: 9

- Very good at preventing peeling. TWP penetrates deep into the wood. This seems to reduce any chance of wearing or peeling at the surface.

TWP 1500 Series

TWP 1500 Series

Cost Per Square Foot: 8

- TWP 1500 Series cost us $174.99 for a 5 gallon pail delivered. This breaks down to $.35 per foot for 2 coats of stain on our 400 square foot deck. We still had 1.5 gallons left when done. Coverage for the TWP 1500 was close to 200 square feet per gallon.

Preventing Mold/Mildew/Algae: 9

- Of all of the oil based stains we tested, TWP offers the best protection against mold spores that are known to grow in oil based stains. This is most likely due to the oils used in TWP’s stains. They do not use linseed oil but rather a mixture of natural and synthetic oils.

Ease of Application: 8

- For an oil based stain, TWP 1500 series applied well. We did notice that you need to back brush any puddles to ensure an even application. This is normal for most of the stains that we have tested. TWP 1500 Series did dry to the touch in 6 hours and we were able to put furniture back on the deck the following day.

Color Shifting (darkening) after 2 Years: 9

- The 1500 series did not “darken” in color like other oil based stains have been known to. TWP actually lightened up slightly at the 2 year mark. This gave the wood a more natural looking feel.

Difficulty of Reapplication: 8.5

- TWP 1500 Series would be an easy stain to reapply. A normal wood deck cleaner would be used to remove some dirt and grime, prepping for another coat.

Overall Score TWP 1500 Series at 2 Year Period: 8.5

- TWP 1500 Series (and 100 Series) have been known to provide tops in terms of durability and color retention. They have always been one of the best stains and is one of our top choices. Little to no fading on the railings. The deck surface faded to about 75% of the stain’ initial color after 2.5 years.

Product Information:

TWP Help? Search Google: TWP Stain Help
More Info: TWP 1500 Series
Cost: $36.99 per Gallon, $182.99 per 5 Gallon Pail
Stain Type: Semi-Transparent – Oil-Based
Available Colors: 1500 Clear, 1501 Cedartone, 1502 Redwood, 1503 Dark Oak, 1504 Black Walnut, 1511 California Redwood, 1515 Honeytone, 1516 Rustic, 1520 Pecan, 1530 Natural
Application Temperature: 45-95 F
Coats Required: 2 Coats. “Wet on Wet”
Coverage Per Gallon: 150-250 sq. ft
Application Tools: Sprayer, Pad, Brush, Roller
Dry Time: 4-12 Hours
Cleanup: Mineral Spirits
VOC Compliant: 250 Compliant in All 50 States
More Info: Product Data
Manufacturer: Gemini Coatings

Test Deck Stats:

When Tested: June 2010
Deck Wood Type: Western Red Cedar
Deck Square Footage: 400
UV Exposure: Full Sun
How Many Years Tested: 2 Years
Stain Color Used:
1501 Cedartone

*All products tested and results are from our experience. We offer no guarantee of similar results. Take inconsideration that results may differ due to different wood types, exposure to UV radiation, and natural weathering.


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359 Responses to “TWP 1500 Series Stain Review”

  1. Natalie says:

    Hello, we're going through the painful process of stripping / sanding a solid Behr stain applied by the previous owner and replacing a few rotten boards in our deck, we suspect the original ones were PTW or cedar, we're replacing with cedar. We're planning to stain with TWP1503 after using the RAD brightener. We're in Northern IL, so we get hot summer days and snow and lots of cold in the winter. My questions:
    1. Should we stain this fall or wait until the spring? There are some boards that, while not truly rotten, seem like they could use a little "drying" time, e.g. the upper surface in some boards looks a little "slimy", especially where the stain was particularly thick and the sun didn't hit very hard.
    2. Any suggestions on how to remove the "mill glaze" in the newer boards?
    3. Are there any downsides to just priming and painting the vertical surfaces with a good primer and exterior paint? We don't have much of an issue having them be a different color.
    Thanks again for all the info!!!

    • 1. You could let it weather until Spring and ten clean and brighten for the final prep.
      2. Weathering and the cleaner will remove the mill glaze.
      3. Bad idea on this as it will peel.

  2. William says:

    I live in upstate new York. I applied Twp 1500 in the summer of 2013 to my house which is sided in pine board an batten siding. The south side of the house which is completely exposed to the sun and weather has shown some spots that look like it might need another application just where there are knots in the wood and a few full length boards look very dry. Where the knot are they are sort of whitening out/ slash looking very dry. I was wondering what the process is to reapply twp 1500? Do you have to clean and brighten the wood or should just hit the knots with twp 1500 and wipe off the excess?

    • Knots are of higher density of wood and it is normal for a penetrating stain to be lighter in color around them. You could try touching up a pot and wiping off the excess. I would suspect though that ti will just lighten up again in a day.

  3. Britt says:

    We are having a 12 x 16 deck built using Cedar. We are in Northern Ohio and the beginning of winter starting soon. We are wondering whether we should seal the deck now or wait until Spring. Warmer sunny days are a rarity now rather than the norm. Will it hurt any if we do decide to wait until Spring to do this? I hate the thought of trapping moisture into the wood right now by sealing it.

  4. Chris says:

    Used TWP 1500 on my new deck 2 years ago. I built the deck with pine and after 3 months of the recommended drying process I stained it. 2/3 of the deck is covered and the uncovered part is already fading and the stain is thinning. All of the AZ sun exposed areas are fading even faster and the wood is drying out. This week I had some stain left over so I decided to restain the stairs and some of the heavily sun exposed areas. Before I stained them I used a steel brush and then a broom on the wood to knock off any dirty and loose particles. The stairs really soaked up the stain and turned darker than the original first staining. My wife and I really like the darker color and it looks like it will last much longer than the first staining. I think 4 to 6 months of new wood cure time would be better for green wood. The sap in the wood also keeps the stain from penetrating into the wood and time is the only cure for that to leach out. Restaing the deck after 2 years is disappointing but hopefully it will last longer this time and I wont regret painting it in the first place.

  5. Dean says:

    We have cedar siding that we've been staining with Sikkens ever since it was new, 24 years ago. Would we be better off sticking with Sikkens or switching to TWP 1501(cedartone)? We're in western Mass, next to Vt. The Sikkens has a beautiful luster and performs well on the north and east sides, but not as well on the south and west because of sun and weather. Thanks! And thanks for operating this excellent site.

    • For you to switch you would have to strip or remove all of the Sikkens and I am not sure you want to do that? TWP also does not have a shine/lustre so it may not have the same look you want? It is a penetrating oil based stain that has a matte or no shine.

  6. Ronald Cooey says:

    I live California in the Sacramento area. Spent weeks filling all the nail holes and sanding the entire deck.used twp 1500 clear it looked great. We had a very mild winter very little rain. I now have black mold everywhere that is not under patio cover.now I will have redo eveything.

    • Couple of questions. Are you sure it is mold? It could be rust stains that look like mold. This could be due to how you sanded. If is is mold, is it \”in\” the stain or laying on top of the stain? TWP prevents mold growth in the stain but no stain or sealer on the market can stop mold from laying on top of the stain.

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*This is first and foremost a help site from our experience as wood restoration contractors. All stain and prepping manufacturer directions were followed with our reviews and ratings. We offer no guarantee of similar results. Take inconsideration that wood and deck stain results may differ due to prepping procedures, different wood types, exposure to UV radiation, natural weathering, etc.

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