The Solution is Premium Protection


A Premium Wood Framing and Subfloor Sealer


Watson Seal® LumberKote™ CS is the FIRST Non-Toxic, V.O.C. Free, Crawl Space Framing & Subfloor Polymer Sealer specifically designed to PROTECT your structural Framing and Subfloor System from moisture related damage. The sealer forms a tough, durable micro-film once dry that protects your crawl space framing and subfloor from excessive moisture absorption and stabilizes the existing moisture content levels in the wood to acceptable levels as well as reducing splits, warping and twist.

Watson Seal® LumberKote™ CS works on all types of lumber including Engineered Joists, OSB, Plywood, Spruce, Pine, Oak and Fir. 


LumberKote™ CS dries to a satin finish and is  a semi-transparent orange. This allows installers, home owners and potential home buyers to easily recognize this home's floor framing system is Watson Seal® PROTECTED. "It's GREEN, but it's ORANGE"

Resists and Inhibits Mold and Fungus


LumberKote™ CS Micro-Film resists mold and fungus associated with excessive moisture and the extreme conditions of the crawl space environment and takes away important elements mold and fungus need to thrive.

The Watson Seal® Process

Watson Seal® LumberKote™ CS


Professional Installation - 30 Year Warranty

Watson Seal™ LumberKote™ CS is  professionally installed by our Authorized Dealers. Our Authorized Dealers are experienced, "Customer First" local companies, fully licensed and insured. Our Dealers are Watson Seal™ Trained and Certified  by our experts to deliver the ultimate customer experience and service.

With our "Perfect Install Guarantee" comes an industry leading 30 Year, Fully Transferable Manufacturer's Warranty with up to $5,000 in water/moisture damaged lumber replacement.


LumberKote™ CS is FEMA Flood Grade Rated, staving off flood waters and protecting the lumber from rapid water uptake and biologicals for an unprecedented 18 days. In addition to our 30 Year Manufacturer's Warranty, Watson Seal issues a multiple-event Lifetime Flood Warranty.

Our sealer's history and independent certified testing has qualified and awarded Watson Seal® a $1,000,000 Mold Rider direct from our Insurance Underwriter. In other words, the "risk" of mold and fungus to grow and feed on the lumber once Watson Seal® protected has been assessed and deemed insurable. Does your home owner's insurance cover mold and fungus in the crawl space without a qualifying event? Does encapsulation warranty against mold and fungus?

Why WS?

Dry Lumber is Strong Lumber


A New Option

Until now, the only option to protect the floor framing system has been crawl space encapsulation. While both sealing and encapsulation achieve the same result, the products, process and cost are completely different.

Watson Seal® LumberKote™ CS is a Patent-Pending, "one-and-done" process that protects the entire floor framing system day and night, 365 days a year without the need for dehumidifiers, additional electrical, or drainage and is backed by a transferable, 30 Year Damage and Limited Lifetime Flooding Manufacturer’s Warranty. The sealer's polymer base, has a 21+ year history that's been real-world tested by over 180,000 consumers with 0 call backs or warranty claims.

If you are considering encapsulation, request a quote and talk to a Watson Seal® rep before you decide. To request a Free Inspection & Quote, please fill out the Request a Quote Form here and a WS Authorized Dealer will contact you in a timely manner, within 1 business day M-F to schedule. 

Request a free quote

A Green Company



Watson Seal® is a proud member of the USGBC (US Green Building Council) and we follow the American Society for Testing and Materials (ASTM) guidelines. While our sealer is Non-Toxic, VOC Free and safe for the entire family, pets and the environment -the quality, durability and benefits of Watson Seal® remain uncompromised.

Watson Seal® sealers meet or exceed ASTM Guidelines, are USGBC LEED rated for points during construction, meet all indoor air quality guidelines and is a 'must' for flood and hurricane prone coastal and flood damaged structure remodels. Chemically verified by Independent Labs for non-toxicity and component registration.  

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