Thompson's WaterSeal 1-gal. Waterproofer Plus Clear Wood Protector - 100 VOC-21801 at The Home Depot
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Thompson's WaterSeal

Model # 21801

Internet # 100131644

Store SKU # 453097

1-gal. Waterproofer Plus Clear Wood Protector - 100 VOC

Thompson's WaterSeal 1-gal. Waterproofer Plus Clear Wood Protector - 100 VOC

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



Model # 21801

Internet # 100131644

Store SKU # 453097

The THOMPSON'S WATERSEAL 1-Gallon Waterproofer Plus Clear Wood Protector features a low-volatile organic compound (VOC) formula that protects outdoor wood and helps to ensure that the wood's natural color lasts. The protector prevents water, mildew and sun damage and is ideal for use on decks, fences, outdoor furniture and other exterior wood. Product exceeds industry standard ASTM D-4446 for waterproofing wood.

California residents: seeProposition 65 information

  • Coats exterior wood to guard against water damage
  • Dries clear to maintain the wood's natural color
  • UV and mildew resistant for durability
  • Dries to the touch in just 48 hours to provide quick protection
  • Requires only 1 coat to protect wood efficiently
  • Subject to or will include a recycling fee in the following states: CA, OR, CT
  • Click here to learn more about waterproofing

Info & Guides

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Assembled Depth (in.)  4.12 in  Assembled Height (in.)  10.25 in 
Assembled Width (in.)  6.63 in  Color/Finish  No Color 
Coverage Area (sq. ft.)  250  Dries clear  Yes 
Dry to the touch (hours)  48  Interior/Exterior  Exterior 
Manufacturer Warranty  Satisfaction Guaranteed  Maximum hydrostatic pressure (lb.)  0.00 
Number of coats recommended  Paint Product Type  Wood Sealers 
Product Form  Liquid  Product Size (oz.)  128 
Textured  No  Time before recoating (hours) 
UV Protection  Yes 


Rated 3 out of 5 by 12 reviewers.
Rated 5 out of 5 by Works great I had a new wood fence put in about 60 days ago then I used this product to spray on the fence. The fence looks amazing. It leaves a clear, glossy protectant. It rained 36 hours after I put it on and everything is still okay. I wore a mask and gloves will applying due to overspray. July 2, 2012
Rated 3 out of 5 by Not as good as it used to be... 4 years ago I would have given this 5 stars. However, they changed the formula and now it has the consistancy of motor oil! This means it is very difficult to use with a regular garden pump sprayer and I had to wipe up a lot of puddles. I wasted quite a bit as the sealant went on too thick in a lot of areas as sealant came out in streams rather than a spray fashion. The product still works great, but I will be switching to another brand for next year that has a lower viscosity so it is easier to apply and not as wasteful. August 30, 2012
Rated 4 out of 5 by Jury's still out... After scrubbing our 2 year old cedar fence with cleaner and allowing it to dry we opted to try this sealer. It's very oily and only after mixing it up (which is not mentioned anywhere on the can) did the product seam to spray better and go farther. However by spraying it on, it really seemed to saturate the fence. Not sure if this is good or bad since it only mentions applying a light coat. My fence is several shades darker and seems to have a constant wet cedar look. I am hoping it will lighten up after it completely dries. I had to wipe up some areas the sealer beaded up today. Seeing as it's only supposed to last a year or two, if I hate it I won't have to wait too long before I get to do this all over again! August 15, 2013
Rated 5 out of 5 by The bomb This has kept my deck in good condition for over a year November 1, 2009
Rated 1 out of 5 by Way too thick Researched reviews from various sources and most loved this product. My neighbor said he used it in a sprayer several years ago and the application was quite simple. Apparently something changed. Purchased two-one gallon cans and each was quite thick/milky in appearance. Changed the various spray patterns in my older and brand new pump sprayer. It was so thick it would not 'fan out' and was impossible to spray my fence. I will be taking the five gallon can back for a refund and finish the rest of the project with something else. May 23, 2014
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Store Exclusive. This item is available for purchase in select stores only.