do you need to sand the wood first to make it smooth before applying the sealer?

Sanding exterior wood "smooth" is a very bad idea. Exterior wood needs to be sanded to open up the pores of the wood for deeper penetration. Sand with 80 grit sandpaper, nothing finer. Most times, cleaning with Seal-Once All Wood Cleaner would be a better choice. It would also depend on the type of wood and the project.......... siding or deck, exterior furniture? Call us.

What is the difference in the Nano+Poly and the Marine?

I believe that the marina stain is has a special formula for freshwater and saltwater

Should i use wood putty/filler before sealing or after sealing by seal-once nano+poly?

Use a top-quality name-brand stainable/paintable outdoor (or interior-exterior) wood filler of genuine wood fibers that will provide expansion and contraction with the surrounding wood. Fill no more than 1/8th to 1/4” per layered application until flush with the surrounding surface--allow ample time for each layer to cure. Sand top layer flush. If choosing to stain, do so next to match if surrounding hue. After the final stain coat dries, apply 1-3 liberal coats of wood hardener, allowing it to dry between each application. If panting, skip stain and then paint over the top coat of dried wood hardener. It should last for the life of the wood in most cases.

Can this be applied with a sprayer? thanks

Yes, but you must immediately back brush. Brush the area that you just sprayed. Apply the second coat while the first coat is still wet. Within 5-15 minutes.

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Seal-Once Nano+Poly Wood Sealer and Waterproofer, Clear, 1 Gallon | With Polyurethane, Water-based, Low-VOC, Waterproofer & Stain, For Decks, Fences & Log Homes

Seal-Once Nano+Poly Wood Sealer and Waterproofer, Clear, 1 Gallon | With Polyurethane, Water-based, Low-VOC, Waterproofer & Stain, For Decks, Fences & Log Homes

Product ID: 23682665

Details

Brand
Seal-Once
Item Weight
8.73 Pounds
Item dimensions L x W x H
7 x 7 x 9
Material
Wood
Style
Protection

🌿Ultra-low VOC, eco-friendly formula

💧Waterproof barrier up to 10 years

🛠️Deep penetrating polyurethane seal

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Description

💧 Seal your wood’s future with style and sustainability!

VERSATILE STYLISH - Available in 9 semi-transparent tints to enhance and preserve your wood’s natural beauty.
ECO CONSCIOUS SAFE - Ultra-low VOC and non-toxic formula keeps your home, pets, and plants safe.
DEEP PENETRATION TECHNOLOGY - Unlike surface-only sealers, it penetrates wood fibers for superior durability.
LONG LASTING WATERPROOF SHIELD - Protects wood surfaces for up to a decade with a flexible, breathable barrier.
EFFORTLESS APPLICATION MAINTENANCE - Water-based, fast-drying, and cleans up easily with soap and water—no harsh chemicals.

Seal-Once Nano+Poly Wood Sealer is a premium water-based polyurethane formula designed for long-lasting waterproof protection on decks, fences, and log homes. Featuring ultra-low VOCs and deep wood penetration, it offers a flexible, breathable barrier that preserves wood naturally while being safe for your family and the environment. Available in multiple tints, it combines durability with aesthetic versatility, backed by up to 10 years of warranty on vertical surfaces.

Specifications

ASIN	B015C8AC1Q
Best Sellers Rank	#6,969 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #49 in Hardware Sealers
Brand Name	Seal-Once
Color	Clear
Compatible Material	Wood
Customer Reviews	4.3 4.3 out of 5 stars (1,515)
Item Dimensions	7 x 7 x 9 inches
Item Form	Liquid
Item Weight	8.73 Pounds
Manufacturer	U-C Coatings
Material Type	Wood
Model	SOP 500G
Number of Items	1
Part Number	SO7500
Style Name	Protection
Surface Recommendation	Floor,Furniture,Siding,Wood
UPC	854734005042
Unit Count	128 Fluid Ounces
Water Resistance Level	Waterproof

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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190420CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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