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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NANO + POLY

Product ID: 23682665

Details

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

🌿Ultra-low VOC, eco-friendly formula

💧Penetrates deep for water resistance

🛡️10-year vertical surface warranty

€ 239.35

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

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Description

🛡️ Seal your style, protect your legacy — waterproof wood done right!

VERSATILE STYLISH - Available in 9 semi-transparent tints to enhance and protect any wood aesthetic.
LONG TERM DURABILITY - Backed by up to 10 years of protection on vertical wood surfaces.
DEEP PENETRATION POWER - Creates a water-resistant shield beneath the surface, not just a topcoat.
EFFORTLESS MAINTENANCE - Fast-drying, UV-stable, and cleans up easily with soap and water.
ECO CONSCIOUS PROTECTION - Water-based, ultra-low VOC formula safe for pets, plants, and people.

Seal-Once Nano+Poly is a premium water-based wood sealer and waterproofer that penetrates deeply to protect decks, fences, and log homes. Featuring a low-VOC, non-toxic formula, it offers long-lasting durability with up to 10 years warranty on vertical surfaces. Fast-drying and UV-stable, it’s easy to apply and maintain, available in multiple tints to elevate your outdoor wood’s natural beauty while safeguarding it against the elements.

Specifications

ASIN	B015C8AC1Q
Best Sellers Rank	#6,781 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #45 in Hardware Sealers
Brand	Seal-Once
Brand Name	Seal-Once
Color	Clear
Compatible Material	Wood
Customer Reviews	4.3 out of 5 stars 1,508 Reviews
Item Dimensions	7 x 7 x 9 inches
Item Form	Liquid
Item Weight	8.7 Pounds
Item dimensions L x W x H	7 x 7 x 9 inches
Manufacturer	U-C Coatings
Material	Wood
Material Type	Wood
Model	SOP 500G
Number of Items	1
Part Number	SO7500
Style	Protection
Style Name	Protection
Surface Recommendation	Floor,Furniture,Siding,Wood
UPC	854734005042
Unit Count	128 Fluid Ounces
Water Resistance Level	Waterproof

Common Questions

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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.

What is Desertcart? Is it safe to order from?+

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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TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

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€ 239.35

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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