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CampgroundSigns >
Custom Signs
> Security Signs
> K-3321

Custom Warning Sign: 24" x 18" Custom Warning Sign - Add Your Text K-3321

Warning (red reverse) 24 in. x 18 in. Sign

Warning (red reverse) 24 in. x 18 in. Sign

Ships Today.

Order within 00 hrs 00 mins

*If a proof is required, ship dates are subject to customer approval of a proof.

Part#

K-3321

SPN#

GAKC

Shape

Vertical

Product Description

Warning header highlights your special message.

Custom sign wizard is simple to use. See and then order your sign online. A variety of materials are available.

0 Select Design:

Warning (red reverse) 24 in. x 18 in. Sign

Custom Warning (red reverse) Security Sign

Warning - Security Cameras In Use Sign

Security Cameras In Use No Trespassing Sign

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This Area is Under Surveillance Sign

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Neighborhood Watch Warning Custom Sign

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0 Select Size:

0 Select Material:

Quantity / Price (Per Sign)

18" x 24"

1
Reflective Aluminum Signs
3M Engineer Grade Reflective Alum.

$68.96
3M Hi Intensity Reflective Aluminum

$76.91
Reflective Aluminum Signs - Premium
3M Diamond Grade Reflective Alum.

$86.91
Rigid Signs
Aluminum

$65.91

View all quantity based discounts

Price List

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3M Engineer Grade Reflective Alum.

Configuration:

(click to zoom)

Die p2 18x24

Die p2 18x24

Die p2 18x24

Die p2 18x24

12+ year life expectancy

This is one of our best selling products.

Great water and chemical resistance

168ºF

Mounts with screws or clips.

Jun 29

(Hover for more details)

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2:34
Extra thick, heavy-duty 80 mil aluminum with Diamond Grade reflectivity.
3x as reflective as High-Intensity Grade.
12+ year durability, Diamond Grade signs are manufactured with premium 3M inks and reflective materials designed for municipal outdoor traffic or parking signs.
Rounded corners - for easy handling and a professional appearance.
Signs have prepunched holes to insure a hassle-free installation.

More Material Details

7+ year life expectancy

This is one of our good selling products.

Great water and chemical resistance

168ºF

Mounts with screws or clips.

Jun 29

(Hover for more details)

2:33
Extra thick, heavy-duty 80 mil rustproof aluminum.
Standard Engineer Grade reflective.
10 year durability backed by a 3M warranty.
Rounded corners - for easy handling and a professional appearance.
Signs have prepunched holes to insure a hassle-free installation.

More Material Details

10+ year life expectancy

This is one of our better selling products.

Great water and chemical resistance

168ºF

Mounts with screws or clips.

Jun 29

(Hover for more details)

2:39
Extra thick, heavy-duty 80 mil aluminum and 3M High-Intensity Grade film.
3x as reflective as Engineer Grade.
10+ year durability backed by a 3M warranty.
Rounded corners - for easy handling and a professional appearance.
Signs have prepunched holes to insure a hassle-free installation.

More Material Details

7+ year life expectancy

Great water and chemical resistance

168ºF

Mounts with screws or clips.

Jun 29

(Hover for more details)

2:18
Heavy-duty 80 mil rustproof aluminum.
3M authorized manufacturer. Printed with 3M inks and materials.
For use indoors or outdoors.
Rounded corners - for easy handling and a professional appearance.
Includes large holes for easy mounting.

More Material Details

0 Order Quantity:

Buy quantity and save

Buy 2+
0% OFF
$68.86/Sign
Buy 3+
9% OFF
$62.87/Sign
Buy 4+
9% OFF
$62.77/Sign
Buy 5+
12% OFF
$60.86/Sign

Buy 2+
0% OFF
$76.86/Sign
Buy 3+
9% OFF
$69.86/Sign
Buy 4+
9% OFF
$69.76/Sign
Buy 5+
10% OFF
$68.86/Sign

Buy 2+
0% OFF
$86.86/Sign
Buy 3+
8% OFF
$79.86/Sign
Buy 4+
8% OFF
$79.76/Sign
Buy 5+
9% OFF
$78.86/Sign

Buy 2+
0% OFF
$65.79/Sign
Buy 3+
9% OFF
$59.86/Sign
Buy 4+
9% OFF
$59.76/Sign
Buy 5+
11% OFF
$58.86/Sign

Size: 18" x 24"

Material: 3M Engineer Grade Reflective Alum.

Package:

1 Sign/Sign

Save $0.00

$68.96 ( $68.96 / Sign )

Free Delivery Over $29.95
Guaranteed Best Pricing
3-Year Warranty

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(800) 952-1457 Mon - Fri 8:00am to 7:00pm EST

Real Customers

Real Customers

1,067 reviews

Reseller Ratings

Reseller Ratings

376 reviews

Customer Reviews

4.9

Based on 18 ratings

5 Star 17
4 Star 1
See all reviews
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Vicki L Sep 02, 2025

Size: 24" x 18" Material Type: Engineer Grade Reflective Aluminum Sign, 80 mil Verified Purchase

Good Quality

Looks great and received fast delivery.

FCCM LLC CA Jan 14, 2024

Size: 24" x 18" Material Type: Engineer Grade Reflective Aluminum Sign, 80 mil Verified Purchase

Signs

Signs look great

Terry Mar 25, 2021

Size: 24" x 18" Material Type: Heavy-Duty Aluminum Sign, 80 mil Verified Purchase

Love my signs

I’m glad the sign was reviewed beforehand. Perfect wording. The message is clearer. I’m very pleased with my signs.

Griffin Aug 17, 2020

Size: 24" x 18" Material Type: Heavy-Duty Aluminum Sign, 80 mil Verified Purchase

Awesome sign!

Looks absolutely fantastic! The top-right corner was a little scuffed but that seemed to be a shipping error. Shipped almost immediately, really happy with my purchase.

Thomas Jun 02, 2020

Size: 24" x 18" Material Type: Engineer Grade Reflective Aluminum Sign, 80 mil Verified Purchase

As Expected Nice Quality Timely Delivery

Very Good Quality Sign delivered Timely

See all reviews

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