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3M 4200 Marine Grade Polyurethane Sealant

Multiple item options available Mfr ID: 4200
Manufactured by: 3M Industrial Adhesives and Tapes
A fast curing, one-part polyurethane that chemically reacts with moisture to deliver strong, flexible bonds to wood, gel coat and fiberglass. It forms watertight, weather-resistant seals on joints and boat hardware above and below the waterline. In addition, its flexibility allows for dissipation of stress caused by shock, vibration, swelling or shrinking.

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Multiple item options available
  • Brand name :  3M
  • Series :  4200
  • Item Name :  Polyurethane Sealant
  • UNSPSC :  31201713

3M marine adhesive/sealant Fast Cure 4200FC white bonds and seals fiberglass, gel coat and wood. Ideal for rub-rails, stern-joints, deck and through-hull fittings and access plates. Medium strength allows for disassembly.

Design & Construction
Cure Type Moisture Cure 
Form Paste 
Color White 
Performance Details
Full Cure Time 24 hr 
Elongation >400% 
Tensile Strength 180 psi 
Environmental Condition
Temperature Rating -40 to 88 deg C 
Chemical Properties
Composition Polyurethane 
Specific Gravity 1.18 
VOC 32g/L 
Supporting Information
Applicable Materials Wood, Fiberglass, Gel Coat, Plastics and Metals 
Application Method Caulk Gun 
Physical Properties
Hardness 40 Shore A 
Odor/Scent Slight 

3M 4200 Marine Grade Polyurethane Sealant Brochure 

3M 4200 Marine Grade Polyurethane Sealant Material Safety Data Sheet (MSDS) 

3M 4200 Marine Grade Polyurethane Sealant Technical Data Sheet 

3M 4200 Marine Grade Polyurethane Sealant Safety Data Sheet (SDS) 

Features :

  • Fast cure formula
  • Allows for disassembly
  • Non-sagging
  • One-component, moisture curing
  • Adheres to a wide variety of substrates
  • Permanently elastic
  • Bonds dissimilar materials

Applications :

  • For Deck Fittings, Portholes, Moldings, Trunk joints, Stern Joints