Polyurethane Sealant 540 White 10.5 fl oz Cartridge Case of 12, One-Component Moisture-Curing Elastic Seal for Construction Automotive Industrial Caulking and Waterproofing

Polyurethane Sealant 540, 12-pack 10.5 fl oz cartridges
✔️ One-component moisture cure, paintable, 90 min skin time

This case of 12 white Polyurethane Sealant 540 cartridges (10.5 fl oz each) provides a moisture-curing, permanently elastic seal used for construction, transportation and industrial caulking, waterproofing and damping applications.

✅ One-component moisture curing, paintable formula
✅ 10.5 fl oz cartridge, case of 12, hand or pressure caulk
✅ Bonds to plastics, FRP, SMC, aluminum, steel, coated metal, wood
✅ Skin time 60-90 min, tack free ~1 hour, cure rate >3 mm/24 hr
✅ Elongation up to 600%, hardness 40 Shore A, tensile 250 psi
✅ Modulus at 100% 58 psi, VOC 53.7 g/L, medium paste consistency
✅ Smoke and flame rated; suitable for sealed ball bearing areas and linear slide units

💡 How do I choose a polyurethane sealant for sealing linear slide units and sealed ball bearing housings? A good choice cures to a flexible, paintable gasket that bonds to metals and plastics and tolerates movement.
Here’s a quick checklist to compare options:
- Check adhesion to metal and plastic substrates for sealed ball bearing protection and ceramic-finished parts
- Match skin time and cure rate to production needs when assembling linear slide units
- Look for high elongation and appropriate Shore A hardness for damping and movement control
- Verify VOC, smoke/flame ratings and paintability for transportation or enclosed environments