Can these be painted?

It can be painted, you will need to use a paint suitable for vinyl material. The first time I tried I didn’t use the correct paint and it peeled off within a couple months.

Can this be mounted over an existing junction box?

This j block is meant for vinyl siding mount to what's behind the siding. The block is the electrical box

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WHITE UNIVERSAL J-BLOCK UNIBLOCK PW

Product ID: 303018378

Details

Connector Type
Screw
Number Of Contacts
1
Mounting Type
Inside Mount
Material
vinyl
Color
White
Brand
Alcoa Home

⚡Supports up to 250V voltage

📏8.19" x 8.19" surface dimensions

🔧Adjustable J-Channel 1/2" to 1-1/4"

$41.63

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Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Elevate your exterior game with the ultimate universal J-Block!

DURABLE VINYL BUILD - Crafted from high-quality vinyl for long-lasting weather resistance and minimal maintenance.
COMPACT LIGHTWEIGHT - Slim 8.19" square design weighing just 6.7 ounces for easy handling and installation.
POWER READY PERFORMANCE - Rated for 250 volts, ideal for reliable electrical connections in any setup.
PRECISION FIT EVERY TIME - Universal J-Block with adjustable J-Channel ensures seamless installation and perfect alignment.
VERSATILE MOUNTING OPTIONS - Supports both inside and surface mounting to suit diverse project needs.

The WHITE UNIVERSAL J-BLOCK UNIBLOCK PW by Alcoa Home Exteriors is a versatile, durable vinyl connector block measuring 8.19" square. Featuring an adjustable J-Channel (1/2" to 1-1/4"), it supports 250 volts and offers both inside and surface mounting options, making it a reliable choice for professional-grade exterior electrical installations.

Specifications

Connector Type	Screw
Number Of Contacts	1
Mounting Type	Inside Mount,Surface
Material	vinyl
Color	White
Brand	Alcoa Home Exteriors
Voltage	250 Volts
Number Of Poles	1
Product Dimensions	8.19"W x 8.19"H
Centerline Length	8.19 Inches
Manufacturer	Alcoa Home Exteriors
UPC	723605946961
Part Number	UNIBLOCK PW
Item Weight	6.7 ounces
Item model number	UNIBLOCK PW
Size	Pack of 1
Item Package Quantity	1
Measurement System	Imperial
Batteries Included?	No
Batteries Required?	No

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$41.63

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered 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 British Virgin Islands.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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