ATTENTION CUSTOMERS: The global pandemic has been putting huge strains on the raw material supply chain for critical construction products. The limited supply of raw materials in the global supply chain has caused dramatic increases in costs for key elements and raw materials and is resulting in more delays with extended lead times. Most manufactures have already implemented “force majeure” and placed additional surcharges to secure their raw materials. Conspec will strive to fill everyone’s orders as much as we can in a timely manner, however with the supply chain broken, and only receiving partial inventory from manufactures with increased demands the shortages are out of our control. We apologize for the inconvenience, but Conspec will do the best that we can to fill your orders in a timely manner. Thank you for your patience and we sincerely appreciate your business in these challenging times.
Sale! 3M 540 Polyurthane Sealant 10-oz Tube
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Conspec Family Business BadgeConspec Warranty BadgeOne-part, fast-skinning, moisture-curing, gun-grade polyurethane sealant.

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3M 540 Polyurethane Sealant

3M Polyurethane Sealant 540 is a high performance, fast curing, one component, moisture curing product which forms a permanent elastic bond to a wide variety of materials including plastics, FRP, SMC, aluminum, masonry, steel, coated metal, and wood. This product is ideally suited for a number of construction applications including; expansion joints, control joints, doors and windows, aluminum curtain walls and storefront glass, as well as precast and tilt-up construction. 3M Polyurethane Sealant 540 is Tack-free in 60 minutes per ASTM C679, features a Joint movement capability of ±25%, and once fully cured is suitable for Submerged waterproof, pool and marine applications. Comparable to 3M 5200 Marine sealant but half the price!  Meets ASTM C-920

• Superior Flexible Bond
• 90 Minute Skin Time
• Smoke and Flame Rated
• Paintable after Tack-Free
• Joint Movement capability 25% +/-
• Bonds to; plastics, FRP, SMC, aluminum, steel, coated metal, and wood
• Use 3M 540 for Sealing, caulking, waterproofing
• Use 3M 540 for Aluminum curtain walls and storefronts
• Use 3M 540 for Doors and windows
• 3M 540 is approved for Submerged and Marine applications

(10-oz Tubes) 3M 540 White 00-021200-49054-5  ,and (10-oz Tubes) 3M 540 Gray are in stock ready to ship

(20-oz Chubs) 3M 540 White 00-021200-56561-8 , (20-oz Chubs) 3M 540 Black 00-021200-96272-1 , and (20-oz Chubs) 3M 540 Gray 00-021200-56562-5 may have 1-2 weeks lead time, please call to check availability.





To view the most recent Technical Data Sheet, please click here.

Weight 20 oz
Dimensions 2 x 2 x 13 in
Product Color

Black, Gray, White

Product Size

10-oz Cartridge

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