Thank you for your question. Nashua 324A is definitely moisture resistant but would not be considered waterproof. It is designed for sealing rigid sheet metal, fiberglass duct board, and flexible duct connections used in residential, multi-family, and light commercial construction.

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NashuaCold Weather Premium Foil Tape [UL 181 A & B Listed/Linered] (324A): 2-1/2 in. x 60 yds. (Silver)

NashuaCold Weather Premium Foil Tape [UL 181 A & B Listed/Linered] (324A): 2-1/2 in. x 60 yds. (Silver)

Q: What is the date stamp on the current rolls of this tape?

My roll of Nashua foil tape is so old it does not have a date on it. I bought it in 1993, and I just used the last of it yesterday (11/26/2019) on a duct, and it worked perfectly. I will be buying more.

Q: Is it flame resistant

Nashua 324A is UL181A & UL181B-FX listed; however it does not meet any flammability requirements such as FAR 25.853.

Q: How hot can this get?

really hot. I use it to block out the air for my air conditioner. I t gets 120 her in Arizona.

Product ID: 77234160

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Details

Brand
Nashua
Colour
Silver
Material
Aluminium
Number of items
1
Special feature
Printed

🔥Wide temp range -20°F to 325°F

❄️Cold-weather adhesive -10°F+

🛠️UL 181 A & B certified HVAC seal

Frequently Bought Together

Nashua 324A/SI2560 324A Cold Weather Premium Foil Tape, 4.8 mil Thick, 60 yd. Length x 2-1/2" Width, Silver

Red Devil 0841DX F-Seal 181 Fiber Reinforced Water Based Duct Sealant, 1 Gallon, Gray, Made in USA

JOUNJIP 12" Duct Folding Channel Tool - 3/8" or 1" Uniform Bends In Sheet Metal

Description

❄️🔥 Seal the deal in any climate—because your HVAC deserves premium protection!

CERTIFIED HVAC EXCELLENCE - Meets UL 181 A & B standards for duct sealing—trusted by pros.
ECO FRIENDLY ENERGY SMART - Contributes to LEED credits with low VOC and energy optimization.
VERSATILE APPLICATION RANGE - Perfect for fiberglass, flexible ducts, dryer vents, and sheet metal.
DURABLE ALUMINUM FOIL BACKING - Premium 4.8 mil thickness ensures long-lasting, tear-resistant seals.
UNRIVALED COLD WEATHER PERFORMANCE - Sticks strong even in freezing temps for year-round reliability.

Nashua 324A Cold Weather Premium Foil Tape is a UL 181 A & B listed aluminum foil tape designed for HVAC professionals. Featuring a robust cold-weather acrylic adhesive, it performs reliably from -20°F to 325°F. Its 4.8 mil thick aluminum carrier provides durable, flexible seals on fiberglass duct board, flexible air ducts, and rigid sheet metal. This tape supports LEED energy and low-emission credits, making it an eco-conscious choice for permanent HVAC sealing solutions.

Specifications

Manufacturer	Nashua
Part Number	324A/SI2560
Product Dimensions	14.3 x 14.3 x 5.99 cm; 907.18 g
Item model number	324A/SI2560
Size	2-1/2 in. x 60 yds. *sale (60mm x 55m)
Colour	Silver
Material	Aluminium
Thickness	4.8 Mils
Installation method	Self-Adhesive
Item Package Quantity	1
Temperature Range	-20-325 Degrees Fahrenheit
Measurement System	Metric, Imperial
Accessory connection type	PSA
Certification	UL181A & UL181B-FX Listed, EA Credit 1 (Optimize Energy Performance) and EQ
Special Features	Printed
Batteries included?	No
Batteries Required?	No
Item Weight	907 g

Have a Question? See What Others Asked

What is the date stamp on the current rolls of this tape?

Is it flame resistant

Is it water proof?

How hot can this get?

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