3M™ Polyurethane Sealant 540

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MULTI-PURPOSE BONDING: Forms long lasting seals dissimilar materials such as plastics, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal and wood for increased design flexibility

FLEXIBLE BONDS: Maintains elasticity for shock absorption and long-term joint movement

PAINTABLE IN MINUTES: Forms a skin in 60-90 minutes that can be painted on once the sealant is fully cured

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Safety Data Sheet (PDF)

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Container Size (Metric)

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Highlights

MULTI-PURPOSE BONDING: Forms long lasting seals dissimilar materials such as plastics, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal and wood for increased design flexibility
FLEXIBLE BONDS: Maintains elasticity for shock absorption and long-term joint movement
PAINTABLE IN MINUTES: Forms a skin in 60-90 minutes that can be painted on once the sealant is fully cured
Weather Resistant: A distinct ability to excel in challenging outdoor industrial, transportation, and construction environments between -40 °F (-40 °C) and 194 °F (90 °C)”
EASY TO USE: Single component, moisture-curing sealant fills gaps and simplifies production

3M™ Polyurethane Adhesive Sealant 540 is a moisture-curing sealant that forms flexible, weather-resistant bonds. This single-component adhesive bonds dissimilar materials including plastics, sheet molding compound, aluminum, steel, coated metal, and wood in temperatures ranging from 40 °F (40 °C) to 194 °F (90 °C). Polyurethane sealants perform well in challenging industrial, transportation, and construction settings by creating durable elastomeric bonds that seal against the elements. High tensile strength, weather-resistance, and low hardness allow 3M™ Polyurethane Adhesive Sealant 540 to excel in applications such as exterior panel bonding, retail storefronts, and transportation manufacturing.

3M™ Polyurethane Sealant 540 is a single-component, moisture-curing, polyurethane sealant used to bond a wide variety of materials, including plastics, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal and wood.

Commonly used in panel bonding and joint sealing applications

Multi-Purpose Sealant
3M™ Polyurethane Sealant 540 is a single-component, moisture-curing, polyurethane sealant used to bond a wide variety of materials, including plastics, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal and wood. It exhibits high tensile strength, low Shore A hardness and low modulus to maintain its functionality in a wide range of extreme service environments. Available in cartridge, sausage pack, pail and drum volumes to meet your application needs.

Recommended Applications

Vertical and horizontal panel bonding and joint sealing
Aluminum curtain walls and storefronts
Transportation manufacturing (bus, rail, truck, trailer)
Replacement of mechanical fasteners in many situations

3M™ Polyurethane Sealant 540 offers an alternative to mechanical fasteners and can replace rivets in some applications.

3M Manual Applicator

Paintable after Skin Forms for Improved Appearance
3M™ Polyurethane Sealant 540 (PDF, 371.52 Kb) offers an alternative to mechanical fasteners and can replace rivets in some applications. It will bond dissimilar substrates and a wide selection of materials. This will perform in temperatures ranging from -40°F/-40°C to 194°F/90°C. Once skin forms (60-90 minutes), the sealant can be painted to improve the final finish.

Polyurethane sealants provide strong, flexible durable elastomeric bonds that seal against the elements.

Choose a 3M Pneumatic Applicator for ergonomic applications

Understanding Polyurethane Sealants
Polyurethane sealants provide strong, flexible durable elastomeric bonds that seal against the elements. These sealants excel in challenging industrial, transportation and construction applications. Polyurethane sealants are available in a wide variety of Shore A hardness, open time and colors to meet many application needs. Choose a 3M Manual or Pneumatic Applicator for dispensing 3M adhesives sealant cartridges and 400ml/600ml sausage packs.

Bringing Better Ideas to the Surface through Science and Innovation
In our 3M Industrial Adhesives and Tapes Division, we apply the science of adhesion to deliver innovative solutions that improve the design and manufacturing processes of companies around the world. In the end, our technologies help customers like you deliver competitive products to the market faster and more efficiently.

Click here for more information on 3M™ Sealants. (PDF, 797.43 Kb)

Typical properties

Details

Adhesive Type	Polyurethane
Application Method	Hand or pressure caulk, Liquid
Application Temperature From (Celsius)	5 ℃
Application Temperature To (Celsius)	35 ℃
Assembly Type	Sealing
Brands	3M™
Container Size (Imperial)	5 fl oz (US), 10.14 fl oz (US), 10.5 fl oz (US), 13.5256 Gal. (US), 50 Gal. (US)
Container Size (Metric)	18.93 ml, 189.3 ml, 310 ml, 400 Liter, 600 Liter
Full Cure Time	>3 mm/24 hr
Hardness	40 Shore A
Industries	Construction, General Industrial, Transportation
Maximum Operating Temperature (Celsius)	90 ℃
Maximum Operating Temperature (Fahrenheit)	194 none
Minimum Operating Temperature (Celsius)	-40 ℃
Minimum Operating Temperature (Fahrenheit)	-40 ℉
Modulus at 100%	58 Pound-Force Per Square Inch
Permeability	Permeable
Physical Form	Medium paste
Product Color	Gray, Black, White
Product Form	Sausage, Cartridge, Gallon, Drum
Product Type	Sealant, Flashing Accessory
Smallest Saleable Unit	Each, Drum
Solids Weight Percent (Approximate)	90 %
Surface Type	Metal
Tack-free Time	1 hr
Tensile Strength (Imperial)	250 psi
Units per Case	1.0, 12.0
Volume (Imperial)	5 fl oz

Resources

3M™ Polyurethane Sealant 540 (Various Colors)

Safety Data Sheets

Document Number: MSDS_0894329_US_EN

(PDF)

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For industrial/occupational use only. Not for consumer sale or use.

3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use. Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice. Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage. For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.