Thompson's WaterSeal 5-gal. Waterproofer Plus Clear Wood Protector - 100 VOC-21805 at The Home Depot
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Thompson's WaterSeal

Model # 21805

Internet # 100183456

Store SKU # 453099

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

Thompson's WaterSeal 5-gal. Waterproofer Plus Clear Wood Protector - 100 VOC

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



Model # 21805

Internet # 100183456

Store SKU # 453099

The THOMPSON'S WATERSEAL 5-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.

  • 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

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Assembled Depth (in.)  10.12 in  Assembled Height (in.)  15.13 in 
Assembled Width (in.)  12 in  Color/Finish  Clear 
Coverage Area (sq. ft.)  1250  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.)  640 
Textured  No  Time before recoating (hours) 
UV Protection  Yes 


Rated 3.5 out of 5 by 6 reviewers.
Rated 1 out of 5 by dissappointed I applied the prodruct as instructed. After apprx. 2 months, I noticed that the portion of the wood deck that was exposed to moderate rain was significantly faded and water penetration was evident. I emailed the company for assistance, buth I have not been contacted yet. It is going on 5 months with no response from the company. I am very dissapointed with the product and customer service. October 29, 2012
Rated 5 out of 5 by Great Stuff I think this stuff is the best available to date. I have used it since the late 60's and it holds up well and helps your deck last 3 times longer. I recommend power washing your deck and letting it dry 1st as I once bought honey colored deck stain before cleaning a deck that had turned dark grey. I was sure that cleaning wouldnt help and i was wrong. If you want the color it will be that color that you buy. In my opinion this product stands above all the others I've tried. May 7, 2010
Rated 3 out of 5 by Disappointed Bought 5 gal. from HD, rocked the can, (habit, like I do with paint before I use it)(NO WHERE ON THE CAN DOES IT SAY TO SHAKE OR MIX BEFORE USE) sprayed the fence, finished the can, and was left with OVER an inch of wax in the bottom... called cust serv, was told, that is NORMAL! (good thing I shook it up a little before) who knows how much wasted product I would have been left with then!. June 10, 2013
Rated 3 out of 5 by always worked,tough to spray works great once applied,bought new 5 gal.pail 5-4-13, when filling the pump sprayer,noticed product was not clear, but had small clumps,which clogged spray nozzle,went back to hd.asked clerk if this had been a problem before,he said he had not heard of this. PRODUCT does not say to mix before application,but tried that and it did not help,so had to brush it on,{which took4-5 times longer than spraying},but does protect my deck well.I apply it once every spring,after pressure washing,and letting dry for 48 hrs, as per instructions.Just wish in was easier to spray,with pump type sprayer. May 5, 2013
Rated 5 out of 5 by Sealed the deck Used a paint roller to spread. Went down with no fuss. Seems to be doing what it is supposed to do. Hard to get excited about it... October 15, 2013
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Store Exclusive. This item is available for purchase in select stores only.