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Wood Finishes / Treatments

Lifetime Wood Treatment is a non-toxic product that can be used for virtually any outdoor project, including siding, trim, fencing, and decks. This one-and-done weathering treatment effortlessly creates a beautiful silver patina look, similar to that of old barnwood. While Lifetime is perfect for exterior projects, many of our customers use it for interior applications as well to achieve a unique, weathered look. Either apply yourself by mixing the powder with water or simply let us apply it for you.

New Product

Ecowood Treatment and Ecostain is a non toxic wood stain, treatment and comes in four pre-mixed colored tints. Our stain comes in red, black, brown, weathered, as well as original un-tinted version.

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Lifetime Wood Treatment

Marks Lumber will pre-dip your lumber, siding, or timbers on a per-order basis. Save time and money by letting us apply the treatment for you! We do Lifetime orders in batches, approximately one time per month depending on the weather. We do not stock Lifetime material.


  • 1 gallon packet covers approximately 200 square feet.
  • 5 gallon packet covers approximately 750-1000 square feet.

New: Ecowood Treatment and Ecostain

We are very excited to announce the availability of Eco Wood Treatment to the public. A new, easy-to-use treatment that naturally beautifies any wood project.

  • Tried & Proven Formula
  • Easy to Use
  • No Maintenance
  • Non Toxic
  • For All Outdoor Wood

Ecowood Brochure

Siding Articles

4 Ways to Help Maintain Your Wood Siding

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How to Install Shiplap Siding

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At Marks Lumber, we take pride in the quality of our products and in ensuring our customers have the right tools to succeed in their projects. Knowing how to properly...

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Everything You Need to Know About 105 Siding

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What is Board and Batten Siding?

Aug 24, 2022

Board and Batten siding is a classic siding that can be found on old barns and houses all throughout Montana and the entire U.S. It is a style that has...

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Project Planning: Replacing Your Wood Siding

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5 Reasons to Choose Shiplap Siding

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Paneling Products for Your Next Winter Project

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Looking for a project to keep you busy this winter? Accent walls are the perfect winter project that can quickly transform an entire room. Natural wood paneling is a...

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Tongue and Groove Paneling Terminology, Decoded

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If you haven’t had much (or any) building experience, wood product terminology can be pretty confusing. Though it may not seem necessary for the average person to understand the...

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Why Rocky Mountain Douglas Fir Makes Excellent Wood Products

Sep 29, 2021

At Marks Lumber, we manufacture high-quality, circle-sawn lumber, timbers, siding, and flooring – all from locally-grown Douglas fir timber. Rocky Mountain Douglas fir is a wonderful choice for many...

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Wood: The Way of the Future

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Wood products are no longer a thing of the past. In fact, many say this renewable resource is the future of the building products industry. This is not only due...

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What Contractors Can Expect From Working With Marks Lumber

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At Marks Lumber, we've been partnering with both residential and commercial building contractors for decades. When homeowners and investors are looking for sustainable circle sawn materials, many of their...

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Three Unique Ways to Use Board and Batten Siding

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Board and batten siding is one of the most popular wood siding options out there. It is highly versatile and works well for various types of homes, shops, barns, and...

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How to Use A Rustic Grade Siding

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Rustic siding options are an economical way to side cabins and outbuildings. They can be a great option to consider when looking for a no-fuss protective barrier for your...

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When's the Right Time to Replace Your Siding?

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Why Choose Wood Siding- The Contractor Edition

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Wood siding is a tried and true favorite for upscale homes, resorts, and commercial buildings alike. A crowd-favorite in the Rocky Mountain region and beyond, the homey and cozy qualities...

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Save On a Shiplap Siding Package from Marks Lumber

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Marks Lumber is now offering 5% off your shiplap siding package with the purchase of 500 square feet of 1x8x8 or 1x8x10 shiplap through February 28th, 2021! Shiplap is a...

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Why Choose Shiplap Siding

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