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The Best Stain to Protect T1-11 Siding

There are many types of siding available on the market, but one of the most popular is T1-11. This type of wood siding is made from plywood and is often used on homes because it is affordable and easy to install.

However, it is important to protect T1-11 from the elements, as it can become damaged over time. The best way to do this is by staining and sealing the wood with a good quality sealant.

What is T1-11 Siding?

A close-up of T1-11 plywood siding installed horizontally.


T1-11 is a wood product made to mimic the look of vertical board and batten siding that comes in two varieties: plywood and oriented strand board (OSB). The latter is less expensive because it consists of lower-quality wood flakes or strands glued together. 

However, both types will wear down over time if not properly protected with a high-quality all-weather stain or paint.

It is available in a smooth or rough finish. If you want a more natural look, there is a rough finish. Sheets come in sizes of 48 inches x 96 inches or 48 inches x 120 inches. Thicknesses are ⅜ of an inch, ⅝ of an inch and ¾ of an inch.

Many homeowners looking to replace their current siding or contractors seeking a cost-effective option for their active project find that T1-11 is an affordable choice that does not sacrifice durability.

Common T1-11 Siding Applications


A small blue garden shed with white doors and window frames. Two benches and a chair sit in front.


T1-11 is a type of siding made of plywood that is often used on sheds. There are several advantages of using T1-11 on sheds.

  • It is easy to install. T1-11 comes in 4×8 inch sheets that are easy to handle and cut to size. It can be fastened to the shed with nails or screws.

  • It is durable if painted or sealed.

  • Finally, T1-11 is an economical choice for shed siding. It is less expensive than other types of siding, such as cedar shakes or vinyl siding.

Chicken Coops

A small green chicken coop with two brown hens sitting on the steps.


Not only are T1-11 chicken coops eco-friendly, but they’re also budget-friendly, making them the top pick for anyone who wants backyard chickens. Even though T1-11 lumber is made using softwood (fir, spruce, hemlock or pine), as long as you seal or treat it with paint stain sealer or preservative, it’ll be just as durable as pressure-treated lumber without the risk of toxicity.

In addition, T1-11 is relatively inexpensive and easy to install, which makes it a great option for DIY projects. When properly sealed and painted, it can provide years of beauty and function.


A barn on a hill covered in snow with red T1-11 plywood siding.


When it comes to protecting your barn from the elements, T1-11 is hard to beat. This durable siding material is often used on commercial buildings and warehouses and can withstand even the most severe weather conditions.

  • Easy to install, making it a popular choice for DIY projects.

  • T1-11 is structural, which reduces the layers of siding needed on your barn.

  • It is an attractive product that provides the look of board and batten siding without all the work.


A wooden sauna with three levels of wooden benches and warm lighting.


Using T1-11 siding on the exterior of your sauna gives it a rustic, farmhouse appeal and compliments the wooden interior, which is usually a tongue-and-groove product. The siding can be installed horizontally to keep the same visual aesthetic as you step from outside into the sauna. This can help save money, as the inside of a sauna is typically redwood or cedar, and installing either of those as exterior siding would increase the cost of your project substantially.

The Best Stain Option to Protect T1-11 Siding

A person applying ZAR® Deck & Siding Solid Color Coating on a white wall constructed with T1-11 plywood siding.


T1-11 is an incredibly versatile wood siding product, but it is plywood — it must be sealed to protect it from the elements. ZAR® makes the finest wood sealers in the industry, offering both clear and solid color options to match any aesthetic.

ZAR Deck & Siding Clear Waterproof Wood Sealer

A gallon bucket of ZAR® Deck & Siding Clear Waterproof Wood Sealer with imagery of a wooden deck.


Unlike other wood sealers that add a coat of color, ZAR Deck & Siding Clear Waterproof Wood Sealer protects your investment by waterproofing it without changing the original shade. It is ideal for recently installed or high-quality wood. 

It enhances wood’s natural tones while protecting it against harsh weather extremes, mildew and UV damage. It can even be applied in temperature extremes, ranging from 40° to 90°F.

ZAR Deck & Siding Semi-Transparent Stain

A gallon bucket of ZAR® Deck & Siding Semi-Transparent Stain in the shade Barnboard.


ZAR Semi-Transparent Stain is perfect for anyone looking to add both color and protection to their wood surfaces. Our unique blend of oils and pigments creates rich, beautiful color with a subtle sheen. Simple application and excellent adhesion, abrasion resistance and long-lasting durability make it perfect for new or old unpainted wood surfaces — even premium lumber! It’s perfect for decks, siding docks, fences, log homes, railings, posts, sheds and more.

Take T1-11 Siding to the Next Level with Solid Color Coating

ZAR Deck & Siding Solid Color Coating

A gallon bucket of (NEW) ZAR® Deck & Siding Solid Color Coating in the shade Purely White/Tint Base.


ZAR Deck & Siding Solid Color Coating is a paint-stain hybrid that penetrates surfaces better than typical stain and has unparalleled durability, adhesion, weather resistance and color retention.

Not only does our weather protection look stunning, it will also withstand the test of time. With fade and wear resistance, it is perfect for new or old projects, such as decks, railings, posts, sheds, siding and more. Plus, it offers UV protection, and mold and mildew resistance are standard. 

The best part? One coat coverage! After a single coat, your wood surface will look flawless and have a high-quality defense against the elements. 

Rely on ZAR for the Best in Stain and Color Coating Options for Your Exterior Projects

If you’re looking for the best in stain and color coating options for your exterior projects, rely on ZAR. Our products are designed to protect your wood from the elements, and we have various options to choose from depending on your needs. We also offer solid color coatings that will give your exterior projects a beautiful, durable finish. 

Contact us today to learn more about our products, or visit our website to see our full line of offerings.