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S2S Milled Lumber

S2S (Surfaced Two Sides) milled lumber is precision-planed on the top and bottom, providing a smooth, uniform surface that’s ready for further processing or immediate use. Ideal for projects requiring consistent thickness and a clean finish, S2S lumber saves you time and effort in preparation. Choose from a variety of wood species and dimensions, all expertly milled to meet your project needs.

Thermory Clear Pine — Cutek Extreme Clear Finish

Thermory Clear Pine is a premium, knot-free grade of Scandinavian pine that undergoes the same chemical-free thermal modification process as Thermory's character-grade boards — heat and steam sustained above 190°C — but is milled from carefully selected clear stock. The result is a smooth, uniform board with a rich, even caramel-brown tone and virtually no knots or visual interruptions, making it the go-to choice for projects where a refined, architectural appearance is as important as long-term performance. Thermal modification permanently reduces the wood's ability to absorb moisture and eliminates the food source that fungi and insects rely on, delivering Class 1 rot resistance without any chemical preservatives (Thermory).

Each board is finished with Cutek Extreme Clear, a penetrating oil engineered specifically for dimensionally stabilizing exterior wood. Unlike surface coatings that sit on top of the board and eventually peel, crack, or flake, Cutek carries its stabilizing oils deep into the wood fibers where they work continuously to reduce moisture movement — the primary driver of cupping, warping, and end-checking. The clear formulation adds no pigment, allowing the warm caramel tone of the thermally modified pine to show through initially, then transition gracefully to a silver-gray patina over time while the board remains fully protected beneath the surface. Reapplication requires no sanding or stripping — simply clean the surface and re-oil when it begins to look dry (Cutek).

Best suited for high-visibility exterior applications where a clean, contemporary wood aesthetic is desired: modern siding, feature walls, soffits, porch ceilings, and covered outdoor living areas.

Specifications

Spec Detail
Species Scandinavian Pine (thermally modified)
Product Line Thermory Clear Pine
Modification Thermo-D (chemical-free, heat + steam)
Grade Clear / architectural grade (knot-free)
Finish Cutek Extreme Clear (penetrating oil)
Finish Type Oil-based, non-film-forming
Color Warm caramel brown (weathers to silver-gray if not re-oiled with colortone)
Rot Resistance Class 1 (highest durability class per EN 350)
Dimensional Stability Significantly improved vs. untreated pine
Warranty 25-year limited warranty against rot and decay (Thermory)
Applications Modern exterior siding, feature walls, soffits, porch ceilings, covered decks, architectural cladding
Maintenance Clean and re-oil with Cutek Extreme as needed — no sanding or stripping required
Sustainability FSC-certified options available; chemical-free modification process
Origin Sourced and modified in Estonia / Northern Europe

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