

Hero image 0 of SEAL-ONCE NANO Flat Clear Water-Based Premium Wood Sealer 1 Gallon - Outdoor Use, 0 of 6
SEAL-ONCE NANO Flat Clear Water-Based Premium Wood Sealer 1 Gallon - Outdoor Use
Key item features
- Advanced Protection: Deep-penetrating nanotechnology bonds at the cellular level to protect wood from water intrusion, decay, and long-term weathering.
- Natural Finish: Transparent, flat finish enhances natural wood beauty while yielding a smoother surface for easy staining or finishing.
- Eco-Friendly Formula: Water-based, ultra-low VOC formula is eco-friendly and safe for use around people, pets, and plants.
- Flexible Seal: Flexible, breathable seal allows wood to expand and contract naturally, helping prevent warping, cracking, and cupping.
- Durable Longevity: Provides up to 6-10 years of durable outdoor protection on decks, fences, siding, and exterior wood projects.
- Water-Repellent Barrier: Engineered to create a powerful water-repellent barrier at the cellular level, significantly reducing the risk of rot.
- Easy Application: Quick to dry and easy to apply for long-lasting, natural-looking resilience in large-scale exterior wood applications.
Generated by AI
Specs
- Wood finish typeWood Preserve
- ColorMulticolor
- FinishFlat
- Rec. useWood Floor
- Coverage area350 sq ft
- Dry time12 h
Current price is USD$59.98
Price when purchased online
- Free shipping
How do you want your item?
Try 30 days for just $1! Choose a plan at checkout.
Columbus, 43215
Arrives by Thu, Feb 19
.Order within 12 hr 37 min
Sold by U-C Coatings
Fulfilled by Walmart
4.5 stars out of 5, based on 20 seller reviews(4.5)20 seller reviews
Return policy
About this item
Product details
SEAL-ONCE NANO Flat Clear Water-Based Premium Wood Sealer delivers advanced nanotechnology protection for your outdoor wood projects while letting the natural grain and character of wood shine through. Its deep-penetrating, eco-friendly formula is engineered to create a powerful water-repellent barrier at the cellular level, significantly reducing the risk of rot, warping, or cracking in decks, fences, and siding—even under the toughest weather conditions. With ultra-low VOCs and a water-based base, this sealer is safe for people, pets, and plants, supporting sustainable outdoor living. Quick to dry, easy to apply, and offering up to a decade of protection, SEAL-ONCE NANO Flat Clear is the go-to solution for long-lasting, natural-looking resilience in large-scale exterior wood applications.
- Deep-penetrating nanotechnology bonds at the cellular level to protect wood from water intrusion, decay, and long-term weathering.
- Transparent, flat finish enhances natural wood beauty while yielding a smoother surface for easy staining or finishing.
- Water-based, ultra-low VOC formula is eco-friendly and safe for use around people, pets, and plants.
- Flexible, breathable seal allows wood to expand and contract naturally, helping prevent warping, cracking, and cupping.
- Provides up to 6-10 years of durable outdoor protection on decks, fences, siding, and exterior wood projects.
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it. Â
Specifications
Wood finish type
Wood Preserve
Brand
SEAL-ONCE
Color
Multicolor
Finish
Flat
Warranty
Warranty information
U-C Coatings, LLC makes every effort to maintain uniformity in our products from shipment to shipment. However: (1) wood and material behavior can be different from species to species or compound to compound, and will change due to weather, temperature, and other environmental factors. (2) U-C Coatings, LLC has no control over how and when our products are used. Therefore, U-C Coatings, LLC cannot guarantee product effectiveness. U-C Coatings, LLC warrants our products for a period of thirty (30) days from date of purchase unless otherwise stated on the packaging label. If the product is defective, U-C Coatings, LLC at our sole option shall replace the product or refund the purchase price. U-C Coatings, LLC shall not have liability for any other damages of any kind, whether direct, incidental, consequential, punitive or otherwise for any defect in our products.
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Warnings
Warning Text
proposition 65 reasons:titanium dioxide, other chemicals
Similar items you might like
Based on what customers bought
SEAL-ONCE NANO+POLY Premium Transparent Polyurethane Outdoor Wood Sealer, 1 Gallon $63.98
Sponsored$6398current price $63.98SEAL-ONCE NANO+POLY Premium Transparent Polyurethane Outdoor Wood Sealer, 1 Gallon
184.3 out of 5 Stars. 18 reviewsShipping, arrives in 3+ daysSEAL-ONCE MARINE Clear Wood Sealer, Waterproofing Deck and Wood Stain, 1 Gallon - Outdoor Use $69.98
8 optionsAvailable in additional 8 options$6998current price $69.98More options from $66.98SEAL-ONCE MARINE Clear Wood Sealer, Waterproofing Deck and Wood Stain, 1 Gallon - Outdoor Use
554.5 out of 5 Stars. 55 reviewsSave withShipping, arrives in 2 daysSEAL-ONCE NANO Flat Clear Water-Based Premium Wood Sealer 5 gal - Outdoor Use $289.00
Sponsored$28900current price $289.00SEAL-ONCE NANO Flat Clear Water-Based Premium Wood Sealer 5 gal - Outdoor Use
Shipping, arrives in 3+ daysZINSSER 288339 Wood Sealer $46.83
$4683current price $46.83ZINSSER 288339 Wood Sealer
Shipping, arrives in 3+ daysReady Seal 130 1-Gallon Can Mahogany Exterior Wood Stain and Sealer $52.01
$5201current price $52.01Ready Seal 130 1-Gallon Can Mahogany Exterior Wood Stain and Sealer
Shipping, arrives in 3+ daysDEFY Crystal Clear Composite Deck Waterproofing Sealer, 1 Gallon $42.95 Was $53.77
Now$4295current price Now $42.95, Was $53.77$53.77You save $10.82You save$10.82DEFY Crystal Clear Composite Deck Waterproofing Sealer, 1 Gallon
124.3 out of 5 Stars. 12 reviewsShipping, arrives in 2 daysTeak Sealer, 1 Quart, Goldtone $51.69
$5169current price $51.69Teak Sealer, 1 Quart, Goldtone
Shipping, arrives in 3+ daysThompson's WaterSeal Clear Wood Sealer, 5 Gallon $92.87
2 optionsAvailable in additional 2 options$9287current price $92.87Options from $92.87 – $176.45Thompson's WaterSeal Clear Wood Sealer, 5 Gallon
3384.4 out of 5 Stars. 338 reviewsSave withPickup tomorrowDelivery tomorrowShipping, arrives tomorrowSemco Teak Wood HoneyTone Finish Sealant Protector Sealer (QUART) $42.00
$4200current price $42.00Semco Teak Wood HoneyTone Finish Sealant Protector Sealer (QUART)
Shipping, arrives in 3+ daysDEFY Extreme Wood Stain and Sealer in One - 1 Gallon Semi-Transparent Waterproof Coating for All Wood Types - Light Walnut $52.95
$5295current price $52.95DEFY Extreme Wood Stain and Sealer in One - 1 Gallon Semi-Transparent Waterproof Coating for All Wood Types - Light Walnut
64.7 out of 5 Stars. 6 reviewsShipping, arrives in 3+ daysThompson's WaterSeal Transparent Wood Sealer, Chestnut Brown, 1 Gallon $25.94
3 optionsAvailable in additional 3 options$2594current price $25.94Options from $25.94 – $49.29Thompson's WaterSeal Transparent Wood Sealer, Chestnut Brown, 1 Gallon
2454.5 out of 5 Stars. 245 reviewsSave withPickup tomorrowDelivery tomorrowShipping, arrives tomorrowBest seller Minwax 134074444 Pre-Stain Wood Conditioner, Clear, 1/2 Pint, (1 Piece, 1 Pack) $7.88
Best seller
2 optionsAvailable in additional 2 options$788current price $7.88Options from $7.88 – $15.76Minwax 134074444 Pre-Stain Wood Conditioner, Clear, 1/2 Pint, (1 Piece, 1 Pack)
4014.7 out of 5 Stars. 401 reviewsSave withPickup tomorrowDelivery tomorrowShipping, arrives tomorrowSeal-once 1 gal Marine with Nano Guard Clear Water-Based Premium Wood Sealer, Pack of 4 $153.03
$15303current price $153.03Seal-once 1 gal Marine with Nano Guard Clear Water-Based Premium Wood Sealer, Pack of 4
11 out of 5 Stars. 1 reviewsShipping, arrives in 3+ daysPlastik Valspar Multicolor Cedar Naturaltone One-Coat Transparent Stain & Sealer $41.74
$4174current price $41.74Plastik Valspar Multicolor Cedar Naturaltone One-Coat Transparent Stain & Sealer
1284.1 out of 5 Stars. 128 reviewsShipping, arrives in 3+ daysTinted Waterproofer $35.99
4 optionsAvailable in additional 4 options$3599current price $35.99Tinted Waterproofer
15 out of 5 Stars. 1 reviewsShipping, arrives in 3+ daysReady Seal Goof Proof Semi-Transparent Pecan Oil-Based Wood Stain and Sealer 1 gal.4 $52.01
$5201current price $52.01Ready Seal Goof Proof Semi-Transparent Pecan Oil-Based Wood Stain and Sealer 1 gal.4
Shipping, arrives in 3+ daysReady Seal Goof Proof Semi-Transparent Wood Stain and Sealer - 1 Gal, Mission Brown $52.01
$5201current price $52.01Ready Seal Goof Proof Semi-Transparent Wood Stain and Sealer - 1 Gal, Mission Brown
Shipping, arrives in 3+ days
Popular items in this category
Best selling items that customers love
SEAL-ONCE CLEAR WATERPROOFER Exterior Wood, 5 Gallon - Outdoor Use $20.99
3 optionsAvailable in additional 3 optionsSponsored$2099current price $20.99Options from $20.99 – $129.98SEAL-ONCE CLEAR WATERPROOFER Exterior Wood, 5 Gallon - Outdoor Use
11 out of 5 Stars. 1 reviewsShipping, arrives in 3+ daysSeal Once 3111 premixed Nano Guard Premium Wood Sealer Natural gallon $66.49
$6649current price $66.49Seal Once 3111 premixed Nano Guard Premium Wood Sealer Natural gallon
Shipping, arrives tomorrowReady Seal 510 Exterior Stain and Sealer for Wood, 5-Gallon, Golden Pine $203.41
$20341current price $203.41Ready Seal 510 Exterior Stain and Sealer for Wood, 5-Gallon, Golden Pine
Shipping, arrives in 3+ daysReady Seal 500 Clear, 5-Gallon Exterior Wood Stain and Sealer, 5 Gallon $203.41
$20341current price $203.41Ready Seal 500 Clear, 5-Gallon Exterior Wood Stain and Sealer, 5 Gallon
Shipping, arrives in 3+ daysReady Seal 816078001104 110 1g Stain & Sealer for Wood - Golden Pine $47.49
$4749current price $47.49Ready Seal 816078001104 110 1g Stain & Sealer for Wood - Golden Pine
15 out of 5 Stars. 1 reviewsShipping, arrives in 3+ daysReady Seal 120 1-Gallon Can Redwood Exterior Wood Stain and Sealer $47.49 Was $58.22
Now$4749current price Now $47.49, Was $58.22$58.22You save $10.73You save$10.73Ready Seal 120 1-Gallon Can Redwood Exterior Wood Stain and Sealer
74.4 out of 5 Stars. 7 reviewsShipping, arrives in 3+ days5 gal Ready Seal 520 Redwood Exterior Stain and Sealer For Wood $171.00
$17100current price $171.005 gal Ready Seal 520 Redwood Exterior Stain and Sealer For Wood
55 out of 5 Stars. 5 reviewsShipping, arrives in 2 daysPenofin Transparent Matte Redwood Oil-Based Alkyd Stain and Sealer 1 gal $48.70
$4870current price $48.70Penofin Transparent Matte Redwood Oil-Based Alkyd Stain and Sealer 1 gal
15 out of 5 Stars. 1 reviewsShipping, arrives in 3+ daysReady Seal 130 1-Gallon Can Mahogany Exterior Wood Stain and Sealer $43.99
$4399current price $43.99Ready Seal 130 1-Gallon Can Mahogany Exterior Wood Stain and Sealer
65 out of 5 Stars. 6 reviewsShipping, arrives in 3+ daysSandstone, Varathane One Step Wood Stain Spar Water-Based Urethane-388143, Quart $29.48 $29.48/qt
$2948current price $29.48$29.48/qtSandstone, Varathane One Step Wood Stain Spar Water-Based Urethane-388143, Quart
414.9 out of 5 Stars. 41 reviewsSave withShipping, arrives in 2 days2 Pack, Sandstone, Varathane One Step Wood Stain Spar Water-Based Urethane-388143, Quart $17.94 $17.94/qt
$1794current price $17.94$17.94/qt2 Pack, Sandstone, Varathane One Step Wood Stain Spar Water-Based Urethane-388143, Quart
414.9 out of 5 Stars. 41 reviewsSave withShipping, arrives tomorrow5 gal Ready Seal 530 Mahogany Exterior Stain and Sealer For Wood $183.32
$18332current price $183.325 gal Ready Seal 530 Mahogany Exterior Stain and Sealer For Wood
64.2 out of 5 Stars. 6 reviewsShipping, arrives in 2 daysMinwax 630500444 Water Based Helmsman Indoor/Outdoor Spar Urethane, Gloss, Clear, 1 Quart, (1 Piece, 1 Pack) $22.88 $22.88/qt
$2288current price $22.88$22.88/qtMinwax 630500444 Water Based Helmsman Indoor/Outdoor Spar Urethane, Gloss, Clear, 1 Quart, (1 Piece, 1 Pack)
543.9 out of 5 Stars. 54 reviewsSave withShipping, arrives in 2 days5 gal Ready Seal 505 Natural (Light Oak) Exterior Stain and Sealer For Wood $189.99
$18999current price $189.995 gal Ready Seal 505 Natural (Light Oak) Exterior Stain and Sealer For Wood
144.6 out of 5 Stars. 14 reviewsShipping, arrives in 2 days5 gal Ready Seal 370045 Natural Cedar Exterior Stain and Sealer For Wood $182.19
$18219current price $182.195 gal Ready Seal 370045 Natural Cedar Exterior Stain and Sealer For Wood
454.8 out of 5 Stars. 45 reviewsShipping, arrives in 2 daysDefy Marine Seal Wood Dock Stain & Sealer, Natural Pine, 2.5 Gal. $124.60
$12460current price $124.60Defy Marine Seal Wood Dock Stain & Sealer, Natural Pine, 2.5 Gal.
Shipping, arrives in 2 daysReady Seal Exterior Wood Stain and Sealer, Pecan, 1 Gallon, Model# 115 $42.57 Was $48.26
Now$4257current price Now $42.57, Was $48.26$48.26You save $5.69You save$5.69Ready Seal Exterior Wood Stain and Sealer, Pecan, 1 Gallon, Model# 115
154.5 out of 5 Stars. 15 reviewsShipping, arrives in 2 days4-Pack of 1 qt Minwax 65700 Clear Sanding Sealer Water-Based $85.36
$8536current price $85.364-Pack of 1 qt Minwax 65700 Clear Sanding Sealer Water-Based
Shipping, arrives in 3+ daysMinwax Water Based Helmsman Indoor/Outdoor Spar Urethane, Gloss, Clear, 1 Gallon $51.78 Was $71.99
Now$5178current price Now $51.78, Was $71.99$71.99You save $20.21You save$20.21Minwax Water Based Helmsman Indoor/Outdoor Spar Urethane, Gloss, Clear, 1 Gallon
523.8 out of 5 Stars. 52 reviewsSave withShipping, arrives in 2 days2-in-1 Wood Sealer & Stain,5gallon All Weather Resistant for Indoor Outdoor Repairs, Paintable Stainable Finish, Strong Adhesion Wood Care, Natural Cedar $219.99
6 optionsAvailable in additional 6 options$21999current price $219.992-in-1 Wood Sealer & Stain,5gallon All Weather Resistant for Indoor Outdoor Repairs, Paintable Stainable Finish, Strong Adhesion Wood Care, Natural Cedar
Shipping, arrives in 3+ days
Customer ratings & reviews
How item rating is calculated
Customer images
Sort by |
Showing 1-3 of 9 reviews
Mar 21, 2025
Bear
Item details
Sold and shipped byMax WarehouseSize: 1 gal
5 out of 5 stars review
Verified Purchase
Great product, fast shipping.
Incentivized Review
Helpful?12Q5B01KL3GR971807697
reply from uccoatings Team
Thank you for your feedback, we’re happy to hear that this product worked well for your application!
May 22, 2025
Cyndi
Item details
Sold and shipped byMax WarehouseSize: 1 gal
5 out of 5 stars review
Verified Purchase
Works Great
I put it on some new wood outdoor furniture I bought. It worked well and was easy to use.
Incentivized Review
Helpful?12Q5B01KL3GR971807697
reply from uccoatings Team
Thank you for your feedback, we’re happy to hear that this product worked well for your application!
May 1, 2021
thecakelady3
Item details
Size: 1 gal
5 out of 5 stars review
Verified Purchase
We'll see
I haven't had time to evaluate the products longevity, but it applied as expected and repels moisture.
Helpful?12Q5B01KL3GR971807697
reply from uccoatings Team
Thank you for your feedback, we’re happy to hear that this product worked well for your application!

