Shell-Guard RTU

Shell-Guard RTU

five star

Borate-Glycol Wood Preservative

Shell-Guard RTU is a ready-to-use borate-based formulation that contains the same active ingredient and glycol carriers that have proven so successful in Shell-Guard Concentrate.

Like Shell-Guard Concentrate, Shell-Guard RTU is colorless, odorless, has a very low level of toxicity to people and pets and is just as effective for preventing wood decay and insect damage to interior and exterior wood members. Shell-Guard RTU is labeled for the control of termites, wood boring beetles, carpenter ants and wood decay fungi.

Since it is ready-to-use, you can pour it right out of the container into your sprayer without the fuss of measuring, mixing and stirring.

Besides its convenience, other advantages to Shell-Guard RTU include its stability and relatively quick drying time. Your logs will be ready to stain within one to three days after a Shell-Guard RTU application.

An application of Shell-Guard RTU is permanent as long as the wood remains protected with Lifeline stains.

(Shell-Guard RTU is not available in California or Canada)

Made in U.S.A. Made in U.S.A.

Sizes & Prices

Order Online


5 Gallon 2.5 Gallon 1 Gallon
$273.87 $157.04 $111.95
shellguardrtu5gal200x200 shell guard rtu shell guard rtu


Shelf Life

  • 3 Years

Application Temperature

  • 40° to 90°

Application Methods

  • Low pressure sprayer
  • Brush

Surface Preparation

  • Clean and dry
  • Bare wood
  • Free of mold and mildew


  • Permanent in wood that is kept sealed
Special Instructions
  • One coat application

Drying Time

  • 1-3 days, depending on weather conditions

Coverage Rate

  • 150-250 square feet / gallon


Coverage Rate

150-250 square feet / gallon


five star G Holdingford in MN (03/12/15) - "For the cost and ease of application you’d be nuts not to use RTU. It’s like an additional insurance policy for your log home. You pour the product into a garden sprayer and saturate the logs. That’s it! It took me 3 hours to do my entire house. This is my second log home, I used RTU on my other home and never had any rot or insect issues. Do yourself a favor, don’t skip this extra step!"

five star T Matthews in TN (03/02/15) - "We like using SGRTU because they have it pre-mixed and it has the right amount of active ingredient. We are able to start applying Lifeline stains in two days instead of waiting two weeks if we use the Shell Guard Concentrate!"

four star L Emerick in NH (08/23/2014) - "Shell Guard RTU dries so fast that it cut’s the job time down to a fraction of what using the other guys borates would have taken."

five star M Abele in MA (10/15/2012) - "You folks were very helpful in dealing with the bug problem at our cabin. Thank you for recommending Shell Guard and the advice repairing our logs. All signs of activity are gone now."

five star T Howard in MN (06/04/2010) - "I recently purchased an older log home that had never been finished; needless to say it was in rough shape. I spoke with a representative at Perma-Chink because I had heard they are the log home authority and would know what to do. The customer service and knowledge I received for my home was everything I was hoping for, they also had Tech Tips sent to my email regarding step by step application procedures that gave me confidence I would be able to apply them on my own. One of my main concerns after I had cleaned the Dirt and UV Damage was the amount of Beetle activity to the logs, they informed me it was most likely Powder Post Beetles and to use a product called Shell-Guard RTU, it is a wood preservative with Borate that penetrates into the wood and kills the bugs. I feel like my Log Home is now protected for many years to come."

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