Do You Need to Seal Cut Ends Of Composite Decking?

Yes, sealing the cut ends of composite decking is recommended to prevent moisture ingress and potential damage. Composite decking is well-known for its superior durability and minimal maintenance. Moisture, weathering, and fading are less likely to attack it. They are made of durable and recycled materials to ensure enhanced lifespan.

If the cut ends of composite decking are covered by fascia or trim boards, you don’t need to use any sealant. Otherwise, it must be sealed to protect it from moisture and other harmful substances.

Why Sealing the Cut Ends of Composite Decking is a Game-Changer!

Composite decking is made of a blend of wood fibers and plastic resins. The cut ends of composite decking have a chance of moisture penetration due to wood fibers.

But if it is covered by fascia or trim boards, you don’t need to seal the cut ends of composite decking.

It hides the side of the perimeter of the wood structure and works as a protective layer. Besides, the deck looks more polished and aesthetic.

However, if it is not covered by any fascia or trim boards, it is best to seal the cut ends of composite decking. Otherwise, it will be more prone to moisture damage.

The composite decking will gradually develop swelling, warping, and splitting issues. You will have to replace it faster than the recommended period.

How To Seal Cut Ends of Composite Decking?

The following 4 steps will help you perfectly seal the cut ends of composite decking:

Step: 01— Remove Dirt and Dust     

The first important task is cleaning the cut ends of the composite decking. It may have dust or debris if exposed to the outdoor environment. 

You can use a soft bristle brush to remove finer debris from the deck surface. 

Alternatively, a compressor air or vacuum cleaner is handy to suck up loose dirt and debris from the composite deck surface. Keep a hand broom to life any stuck dirt. 

Step: 02— Use A Cleaner

If you have not cleaned the composite decking for a long time, it may have accumulated a noticeable amount of algae, dirt, grime, etc., over time. 

Using a composite deck-friendly cleaner effectively removes black stains and other things from the surface. 

I recommend you use Defy Composite Deck Cleaner. It is safe to use on both natural wood-based and composite decks. 

The cleaner will thoroughly clean your composite deck by penetrating the wood pores. Follow the manufacturer’s instructions regarding how much to mix with water. 

Wait for 15-20 minutes after applying the solution. Use a stiff-bristle brush and scrub gently all the areas you want to seal. Finally, wash it with water and dry it properly. 

Step: 03— Apply the sealant 

The next task is applying the sealant. Choose a sunny day when the temperatures are between 45°F and 95°F. 

Avoid thinning the sealant with any water. Shake or stir it appropriately before applying it. 

Protecting the nearby areas requires using cardboard or any plastic pieces. 

Use good quality nylon or polyester hand brushes to apply the sealant. Alternatively, you can use a roller too. 

Apply a thin, even coat to the cut ends of the composite decking boards. 

Make sure to follow the back-brushing technique to distribute the sealing product evenly and force it to penetrate the deck surface and seep into the composite material deeper.

Step: 04— Allow The Sealer To Dry  

Carefully inspect your application pattern. There should not be any drips, runs, or overspray. Work on them before they dry fully. 

After applying the sealer appropriately, let it dry for 4 to 6 hours, depending on the temperature and humidity. 

However, don’t touch the deck for at least 24 hours. They need enough curing time to create long-lasting and hard seals. 

What Sealant To Use To Seal Cut Ends Of Composite Decking? 

Ever wondered what the best composite deck sealer is? A lot of sealant options are available. But not all of them are reliable. 

i) Specialized Composite Deck Sealer 

Natural wood-based and composite-based decks may not work from the same sealant. Using a special composite deck sealer is best to get the best result. 

One of the most popular products is DEFY Composite Deck Sealer. 

This high-quality sealant is made of zinc nano-particles to protect the cut ends of composite decking from water, fungi, and UV radiation.

It will provide long-lasting protection from color fading, darkening, and moisture.

Plus, zinc nano-particles in the sealants will protect the physicochemical and mechanical properties of the composite deck. 

ii) Special End Caps

If you don’t interest in using any chemical-based sealants, you can use special end caps. They are specially designed to fit over the cut ends of the decking. 

Can you cut composite decking? Ensure you know the best way to cut trex decking because the special end caps may not fit perfectly to the composite decking cut ends. 

End caps are mainly made of plastics. They are available in various colors, such as dark brown, coffee, chocolate, black, charcoal, anthracite, etc. 

You don’t need any tool to install these special end caps on the composite decking boards. They can give your decking a stylish finished look.

Bonus Maintenance Tips For Composite Decks 

Does composite decking need maintenance? Of course, composite decks need much less care compared to wood decks.

But it doesn’t mean you will completely ignore it. Careful maintenance will ensure long-lasting durability. 

The following are the essential maintenance tips to ensure an enhanced lifespan for your composite decks:

• Clean food debris immediately to prevent fungal growth from moisture and decaying organic matter. 
• Avoid using metal shovels or sharp items to remove snow. Its sharp blades may the deck scratched or gouged.
• Composite decking absorbs heat and becomes warm. So keep your decking protected from any sources of fire. 
• Make sure to clean oil and grease immediately. They are more likely to cause permanent stains and discoloration if not cleaned quickly.
• Clean your composite deck at least twice a year with a composite deck cleaner.
• Though composite decks are highly resistant to moisture, it is still best to keep them always dry to avoid mold, mildew, and organic decay.

FAQ’s

Summing UP 

On average, well-maintained composite decks with proper sealing around the cut ends will last 25 to 30 years. It can be as high as 50 years in some cases.

I have already answered, “Do you need to seal cut ends of composite decking?” Also, this article covered what sealant to use and how to seal cut ends of composite decks. 

Make sure to clean your composite decks from time to time. Please keep it safe from color fade, darkening, and moisture to ensure long-lasting durability.