Thompson’s WaterSeal Heavy Duty Deck Cleaner – 1 Gallon

Thompson’s WaterSeal Heavy Duty Deck Cleaner is specially formulated to tackle tough outdoor cleaning and restoration jobs. It effectively removes weathered clear and tinted waterproofers and old semi-transparent stains from decks, fences, outdoor furniture, and other exterior wood surfaces. Beyond stripping old finishes, it works to restore the natural color and beauty to severely weathered and discolored wood without the use of harsh bleach.

This powerful cleaner also removes tough stains from dirt, mildew, algae, and fungus, rejuvenating your outdoor spaces. Unlike many competitive products, Thompson’s WaterSeal Heavy Duty Deck Cleaner is self-neutralizing, which means you save a step as no separate neutralizing solution is required before applying a new waterproofer or stain. It’s also suitable for cleaning composite decking. Prepare your exterior surfaces for a fresh new look with this effective, ready-to-use solution.

Key Features:

• Removes Old Finishes: Effectively strips weathered clear/tinted waterproofers and semi-transparent stains.
• Restores Natural Wood Color: Brings back the wood’s original beauty from severely weathered or discolored states without bleaching.
• Cleans Tough Stains: Removes stains from dirt, mildew, algae, and fungus.
• Self-Neutralizing: No need for a separate neutralizing step before refinishing.
• Ready To Use: No mixing required.
• Versatile Application: Suitable for decks, fences, outdoor furniture, exterior wood, and composite decking.

Approximate Coverage: 100 ft²/gal – 250 ft²/gal. Actual coverage will vary due to the porosity and condition of the surface material.

Product Application & Use:

Before You Begin (Important Precautions):

• Corrosive: This product is corrosive. Handle with extreme care.
• Test Patch: Always conduct a trial patch on an inconspicuous area before applying to the entire surface to ensure desired results.
• Surface Condition: Can be applied to dry or damp wood.
• Protect Surroundings: Avoid spraying on windy days. Close all nearby windows and doors. Remove or cover all deck furniture, decorative items, plants, and shrubs. Saturate the ground around plants/shrubs with fresh water before application and cover them. Uncover plants promptly after use and rinse the area again.
• Protect Yourself: Wear a long-sleeved shirt, long pants, chemical-resistant eye protection (safety glasses/goggles), and rubber gloves when handling and during application. Avoid prolonged contact with clothing, carpet, or fabric.
• Ventilation: Use only with adequate ventilation. Ensure fresh air entry. Avoid breathing mist. If experiencing irritation, increase fresh air, wear NIOSH-approved respiratory protection, or leave the area.
• Redwood Notice: May slightly darken redwood. To brighten wood after using this cleaner, Thompson’s® WaterSeal® Deck Cleaner & Brightener can be used.
• Work in Sections: Treat small areas at a time (what you can work on within 10-15 minutes). Work backwards on horizontal surfaces; work bottom-up on vertical surfaces.
• Slippery When Wet: Exercise caution when working on wet surfaces.

Application Directions:

1. Preparation: Add contents of the container to a plastic bucket or plastic pump-up sprayer. Do NOT use a metal container.
2. Apply: For ease of application, apply with a pump-up sprayer (coarse spray setting) or use a synthetic bristle brush or roller. Do not apply to an area larger than you can work on within 10-15 minutes.
3. Dwell Time: Wait 10-15 minutes after application. Do not let the product completely dry on the surface. If it starts to dry, re-wet the surface with a garden hose. Keep your brush wet.
4. Scrub: Scrub the surface with a synthetic, stiff-bristle brush (do NOT use wire or natural bristle) to remove any stain or finish that does not come up immediately.
5. Stubborn Areas: If stubborn areas remain, repeat the application and scrubbing in those areas.
6. Rinse Thoroughly: Rinse the surface completely with a garden hose or pressure washer (on a low setting, taking care not to damage wood), removing all residue. After rinsing the surface, saturate the ground around plants and shrubs with fresh water again.

Dry Time (Before Applying Waterproofer/Stain): Allow the wood to dry thoroughly for 2-3 days (48-72 hours), depending on weather conditions, before applying a Thompson’s® WaterSeal® oil-based waterproofer or stain, or other wood sealers/waterproofers.

Specifications:

• Brand: Thompson’s WaterSeal
• Product Type: Heavy Duty Deck Cleaner / Wood Stripper
• Form: Ready-To-Use Liquid
• Package Size: 1 Gallon
• For Use In Location: Exterior
• Key Chemical Component: Contains Sodium Metasilicate
• Recommended Uses: Cleaning & stripping weathered clear/tinted waterproofers and semi-transparent stains from exterior wood (decks, fences, furniture) and composite decking. Restoring natural wood color. Removing dirt, mildew, algae, fungus.
• Application Method: Plastic pump-up sprayer, synthetic bristle brush, or roller.
• Coverage: Approx. 100-250 sq ft per gallon.
• Dwell Time on Surface: 10-15 minutes.
• Wood Dry Time (Before Refinishing): 2-3 days (48-72 hours).
• Cleanup (Tools): Water (Assumed for tools used with the cleaner – Verify on label).
• VOC Level: Information Not Provided – Refer to product label/SDS
• Weight (Approx.): 8-10 lbs (Estimate for 1 Gallon liquid)

CAUTIONS / FIRST AID: DANGER! CAUSES EYE, SKIN AND RESPIRATORY TRACT BURNS. HARMFUL OR FATAL IF SWALLOWED. Contains Sodium Metasilicate.

• Do not allow contact with eyes and skin. Wear safety glasses/goggles and rubber gloves when handling and during application.
• If material contacts skin, immediately wash with soap and water.
• Use only with adequate ventilation. Avoid breathing mist. If you experience eye watering, headaches, or dizziness, increase fresh air, wear NIOSH-approved respiratory protection, or leave the area.
• Keep container closed when not in use. Do not transfer contents to other containers for storage.
• FIRST AID: In case of eye contact, immediately flush eyes with water for at least 15 minutes. 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, do not induce vomiting. Call Poison Control Center, hospital emergency room, or physician immediately.
• DO NOT TAKE INTERNALLY. KEEP OUT OF THE REACH OF CHILDREN. (Always refer to the product label for complete and current safety information and first aid procedures.)