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3M 4200 Marine Fast Cure Adhesive Sealant

Product Description

The 3M™ Marine Adhesive and Sealant Fast Cure helps to bond and seal fibreglass, gelcoat and wood. It's ideal for rub-rails, stern-joints, deck and through-hull fittings, as well as access plates.

3M™ Marine Adhesive and Sealant Fast Cure is a fast curing, one part polyurethane that chemically reacts with moisture to deliver strong, flexible bonds to wood, gelcoat and fibreglass. 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. The adhesive and sealant offers a medium strength which allows for disassembly.

Suggested applications
  • Bonding and sealing fibreglass, gelcoat and wood

Adhesive Type


Application Method

Hand or pressure caulk



Full Cure Time

24 hr


40 Shore A



Modulus at 100%

150 Pound-Force Per Square Inch

Product Colour


Product Form


Solids Weight Percent (Approximate)

90 %

Surface Type

Metal, Painted Surface

Tack-free Time

90 Minutes

Tensile Strength (Imperial)

300 psi


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