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Weatherables Fast 2k Fence Post Backfill

Weatherables Fast 2k Fence Post Backfill

Q: Could this be used to fill a plaster of Paris mold?

Not that I'm aware of, it doesn't really say on the package but it does sit up very fast and is very durable. Sorry but that's the best I can answer your question.

Q: Could this be used to hold an 8x8 supporting a substantial weight?

I had to replace a 4x4 post for my mailbox and used this 2K Post Back Fill. I already had a deep hole in the cement, so this stuff fills up the gaps beautifully all around and keep the post solidly planted. I'm not sure about 8x8, weight is not the issue here but you would need a "solid" hole like in my case to hold to post, then this foam would then fill up any gaps. Good luck.

Q: Can this be used to form the deck list foundation where the 8x8 post then sits on top held by a bracket anchored in the foundation?

No, Fast 2K can only be used for installing posts that are sunk into the ground. It cannot be used as a foundation material nor can any brackets be anchored into it.

Q: Would this be good to use for posts for a horse fence strong and sturdy?

Yes, also sets up quick and should be good for a horse fence.

Product ID: 759382318

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Details

Material
Glue Sealant
Brand
H.B. Fuller
Item dimensions L x W x H
38 x 216 x 191
Color
no color
Shape
bag

⚡15-min fast assembly

💧waterproof & hydrophobic

🪶lightweight 2.5 lbs bag

Frequently Bought Together

Fast 2K Fence Post Mix and Concrete Alternative and Replacement for Fence Post and Mail Post Installs. 32.8 oz Bag of Expanding Composite Footing Compound

Johnson Level & Tool 175-O Orange Post & Pipe Level, 4" x 5" x 9", Orange, 1 Level

Description

🚀 Upgrade your fence game with pro-speed, pro-strength, and zero hassle!

VERSATILE WINTER READY - Perfect for fences, mailboxes, sports posts, and more—works flawlessly even in cold weather conditions.
EFFORTLESS SETUP IN MINUTES - Skip the mess—assemble and secure your posts in just 15 minutes with no water or mixing required.
PROFESSIONAL GRADE DURABILITY - Uses extended composite tech trusted by electrical pros for superior strength and adhesion to wood, vinyl, and metal.
LIGHT AS A FEATHER STRONG AS STEEL - Replace 80-100 lbs of concrete with a compact 2.5 lb bag that’s easy to carry and handle.
WATERPROOF PROTECTION AGAINST ROT RUST - Hydrophobic formula seals out moisture, extending the life of your fence posts and preventing costly damage.

Weatherables Fast 2k Fence Post Backfill revolutionizes post installation by replacing heavy concrete with a lightweight, waterproof composite bag that sets in 15 minutes without water or mixing. Designed with professional-grade technology, it offers superior adhesion, prevents water damage, and works in all seasons—making fence, mailbox, and pole installations faster, cleaner, and more durable.

Specifications

Item Diameter	3.05 Centimeters
Item Weight	2.5 Pounds
Specification Met	True
UPC	713976908484 669602000322
Number of Items	1
Manufacturer	H.B. Fuller
Part number	254-20-S
Item Weight	1.13 Kilograms
Is Discontinued By Manufacturer	No
Size	1 Pack
Style	Fence Post Mix
Finish	Metal
Cutting Diameter	3.05 Centimeters
Measurement System	Metric
Included Components	Multitool Accessories
Batteries Included	No
Batteries Required?	No
Item Dimensions LxWxH	38 x 216 x 191 mm

Have a Question? See What Others Asked

Could this be used to fill a plaster of Paris mold?

Could this be used to hold an 8x8 supporting a substantial weight?

Can this be used to form the deck list foundation where the 8x8 post then sits on top held by a bracket anchored in the foundation?

Would this be good to use for posts for a horse fence strong and sturdy?

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