Thompson's® WaterSeal® Penetrating Timber Oil


Available Colors


Timber Oil provides outdoor wood protection and beauty – all in one. This unique formulation nourishes and beautifies exterior wood, including hardwoods with its triple blend of premium oils. The deep penetrating oils protect the wood from water damage, while the coating resists mildew and UV damage.

Key Features

  • Penetrating Formula Nourishes & Beautifies
  • Premium Iron Oxide Pigments add Beautiful, Natural Color
  • Specially Formulated to Minimize Lap Marks & Color Streaking
  • Creates Maximum Wood Grain Intensity
  • Durable Coating Resists Mildew & UV Damage
  • Prevents Water Damage
  • Use On: All Exterior Woods, Including Hardwoods
Available At

Before You Begin

  • For exterior use only.
  • For wood substrates only.
  • To ensure good penetration, do not apply in direct
    sunlight or on hot days. Both surface and air
    temperatures should be above 50°F and below 95°F.
  • Do not use in below grade application where water
    pressure is a problem or on painted or recently
    stained surfaces.
  • New wood that has not been kiln dried must be allowed to season 15 to 30 days before applying product.

Surface Preparation

WARNING! Removal of old paint by sanding, scraping or other means may generate dust or fumes that contain lead. Exposure to lead dust or fumes may cause brain damage or other adverse health effects, especially in children or pregnant women. Controlling exposure to lead or other hazardous substances requires the use of proper protective equipment, such as a properly fitted respirator (NIOSH approved) and proper containment and cleanup. For more information, call the National Lead Information Center at 1-800-424-LEAD (in US) or contact your local health authority.

  • Surfaces and substrates must be free of all mildew stains, dust, dirt, oil, soot, grease and other contaminants.
  • Surfaces without any previous exterior stain or coating must be thoroughly cleaned prior to application with a deck cleaner (like those in the Thompson's® WaterSeal® deck cleaner line) applied according to label directions and cautions.
  • For surfaces previously coated, remove all existing loose, flaking or peeling stain. Failure to do so will result in continued flaking and peeling. For best results, remove all existing exterior stain or coating with Thompson's® WaterSeal® Maximum Strength Deck Stripper applied according to label directions and cautions.
  • If surface is damp or wet from cleaning or weather, allow the surface to dry thoroughly (a minimum of 48 hours) prior to applying for optimal penetration.


  • Do not mix with other waterproofing products; variations in the final appearance of the surface being treated may result.
  • Do not thin.
  • Shake well - intermix all cans (of the same color) to be used to assure color uniformity. Shake, stir or mix thoroughly before and occasionally during use.
  • A small trial patch should be tried before application over the entire surface. Final color appearance differs from initial application.
  • Apply using an exterior paint pad, brush, roller, dipping or compression driven sprayer.
  • A thin coat should be applied at a rate the wood will absorb. Excess product allowed to sit on surface will result in a tacky finish and extended dry time. If over applied, remove excess before it dries by redistributing to dry areas or wiping off.
  • Use natural breaks (windows, doors) as boundaries to divide large areas into more manageable work areas.
  • Only one coat of Thompson's® WaterSeal® Penetrating Timber Oil is recommended. A second coat may be applied depending on wood porosity and wood moisture content.
  • Use only with adequate ventilation.


  • Drying time will vary depending on temperature and humidity.
  • Under normal conditions, Thompson's® WaterSeal® Penetrating Timber Oil should dry to the touch within 8 hours.
  • Wait 24 hours for heavy foot traffic and outdoor furniture placement.

Clean Up

  • Clean brushes and equipment with mineral spirits following manufacturer’s safety recommendations, then rinse with clean water.

DANGER: Rags, steel wool, other waste soaked with this product, and sanding residue may spontaneously catch fire if improperly discarded. Immediately place rags, steel wool, other waste soaked with this product, and sanding residue in a sealed, water-filled, metal container. Dispose of in accordance with local fire regulations.



CAUTIONS: CONTAINS AROMATIC HYDROCARBONS. Contents are COMBUSTIBLE. Keep away from heat and open flame. VAPOR HARMFUL. Use only with adequate ventilation. To avoid overexposure, open windows and doors or use other means to ensure fresh air entry during application and drying. If you experience eye watering, headaches, or dizziness, increase fresh air, or wear respiratory protection (NIOSH approved) or leave the area. Avoid contact with eyes and skin. Wash hands after using. Keep container closed when not in use. Do not transfer contents to other containers for storage. FIRST AID: In case of eye contact, flush thoroughly with large amounts of water for 15 minutes and get medical attention. For skin contact, wash thoroughly with soap and water. In case of respiratory difficulty, provide fresh air and call physician. If swallowed, call Poison Control Center, hospital emergency room, or physician immediately. DELAYED EFFECTS FROM LONG TERM OVEREXPOSURE. Contains solvents which can cause permanent brain and nervous system damage. Intentional misuse by deliberately concentrating and inhaling the contents can be harmful or fatal. WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. DO NOT TAKE INTERNALLY. KEEP OUT OF THE REACH OF CHILDREN.

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