Message to Our Customers

Thompson's WaterSeal

Model # TH.041805-20

Internet # 204814320

Store SKU # 1000037543

5 gal. Clear Waterproofing Wood Protector

This item has been discontinued.
The Home Depot no longer carries this specific product.

$64.98 /  each


Model # TH.041805-20

Internet # 204814320

Store SKU # 1000037543

Thompson’s WaterSeal Waterproofing Wood Protector Clear provides complete outdoor wood protection. It waterproofs long after the initial water beading is gone. Use on decks and fences, outdoor furniture, exterior wood.

California residents: see  Proposition 65 information

  • Prevents water damage
  • Helps maintain wood’s natural color
  • Coating resists mildew and UV damage
  • Exceeds industry standard ASTM D-4446 for waterproofing wood
  • Subject to or will include a PaintCare recycling fee in the following states: CA, CT, OR, RI, VT, MN

Info & Guides

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Coverage Area (sq. ft.) 
Product Size (oz.) 
Dries clear 
Dry to the touch (hours) 
Number of coats recommended 
Paint Product Type 
Wood Sealers 
Product Form 
Time before recoating (hours) 
UV Protection 
Warranty / Certifications
Manufacturer Warranty 
Satisfaction Guaranteed 


Rated 3.1 out of 5 by 14 reviewers.
Rated 1.0 out of 5.0 by Not Good! Can't apply with sprayer --- too thick even when diluting with thinner. Turns wood very dark -- hope it lightens up after drying. Tried to mix with their honey gold product to get some tint and it's like trying to mix oil and water yet both are oil based. What a mess! Basically, time consuming and poor results. May 24, 2015
Rated 1.0 out of 5.0 by Misleading application information I used this product several years ago with great results so never questioned using it again. Wrong answer! Evidently they have changed the formula and it is a thick milky substance that will not spray through a garden sprayer. The instructions state that one can be used, but I can attest to the fact that you will have a clogged sprayer that will not work. It also is far from a clear coating. Turned my deck very dark and I resorted to applying with a roller and brush. Spent nearly 4 hours doing a 30 minute job. It does seem to bead water ok but that's the only plus. Contacted Thompsons customer service about possibly thinning it with something but their only answer is to apply a thin coat? October 28, 2014
Rated 1.0 out of 5.0 by Older product was good and applied easily with a tank sprayer .This one is terrible. I have used this product every year for many years with good results.This year it is terrible.Like some of the reviewers said it has gone from a fluid ,clear slightly honey colored easy to apply product to a milky gooey impossible to apply with a tank sprayer mess .If you buy it , get out the paint brushes and prepare to spend hours to do a one hour job. Taking it back and will never buy it again. April 16, 2015
Rated 4.0 out of 5.0 by Mixed Review - But It Does WaterProof! The Good - It works! It really does waterproof. It dries OK if applied on sunny day in 48 hours. It is thick and you need to brush it out thin. Only need a thin layer to waterproof. It dries clear. It is long lasting. 1 yr in windy rainy areas or 2 yrs in more protected areas. The Bad - It does not spray. Needs brushing. It is thick and does not thin with additives. The Ugly - It does darken wood. Warning - Do not confuse the GREEN Wood Only WaterProofing with the All Purpose Concrete/Wood WaterProofing. The All Purpose WaterProofing is Lots Of Trouble. May 28, 2015
Rated 1.0 out of 5.0 by Reformulated, stay away from this product They reformulated and its like motor oil and will not spray with pump spray even tech support conformed. can still has a spray, deceptive advertising. . Did not know this when I started, what a disaster. Used it for 20 years never again this is garbage now. May 26, 2015
Rated 5.0 out of 5.0 by Interesting sidelite I have just built 2 small table for my daughter's patio next to her pool. I knew the tables would get splashed and probably beer spilled on them so I decided I should coat the wood with somet5hing to protect. Thompson's has a good rep so I chose that. This is a coating that will go under a couple coats of Acrylic polyurethane. When I applied the Thompson's the grain and colors of the wood came out better than they do for just stain or varnish. I have never seen colors this vibrant. This product will be in my wood finishing arsenal from now on. June 4, 2014
Rated 5.0 out of 5.0 by Excellent product. I've used Thompsons on my deck for 25 years and have had minimal damage to the pressure-treated wood. Initially I used the red label formula but switched to the green formula about 5 years ago. The green formula is thicker and harder to apply but tends to last longer resulting in fewer applications. The product is a little pricey but in the long run it is way cheaper than replacing a deck. May 25, 2014
Rated 1.0 out of 5.0 by Awful Had the same experience as the reviewer from 10/28/14 (Scof from Vallonia, IN). Product is very viscous and does NOT apply in a thin layer through a garden sprayer. It spots/stains as soon as it hits the wood. I had to come right behind the spray with a roller. I have a 250 sq/ft deck and it took me 3+ hours to apply and I still haven't gotten the spindles. At this point, I'm just hoping my deck isn't ruined and that it will dry without me tracking water sealer everywhere I go for the next year. Terrible product. November 10, 2014
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Store Exclusive. This item is available for purchase in select stores only.