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Marine Adhesives Strength and Usage Comparison Chart


Figuring out which marine caulk is appropriate for your application can be daunting. Some are suitable for building or structural use, while others do no more than provide a waterproof seal. Whether you are bedding deck hardware, caulking teak decks, or repairing leaks, this chart will help you make the right choice.

Product Tensile Strength Uses Sandable/
Paintable
Tack Cure Rate
3M 5200
Polyurethane
700 psi
Use on wood, fiberglass, hardware, motors on fiberglass transoms, seams, joints, between struts and planking, stern joints, etc. Primer may be needed for metal applications. For above and below the waterline.
Yes
48 hrs
5-7 days
3M 5200 Fast Cure
Polyurethane
600 psi
Ideal for applications where a fast long term seal is needed.
Yes
2 hrs
1 day
TotalBond
Hybrid Polymer
490 psi
Advanced hybrid polymer adhesive to bond, caulk, or seal above or below the waterline. Use on metals, synthetics, wood and building construction. Permanently flexible.
Yes
45 mins
12-18 hrs
Sika 295 UV
Polyurethane
290 psi
Direct glazing adhesive for polycarbonate acrylic use with Sika Primer 209 as a sealant for glass, ceramics, metals, plastics, fiberglass, and many types of paint.
Yes
50 mins
1 day
TotalSeal
Elastomeric
350 psi
All purpose adhesive sealant that has excellent elasticity and great adhesion to fiberglass, metal, wood, glass and Starboard. Designed for bedding hardware, windshields and more. For above and below the waterline.
Yes
10 mins
1 day
3M 4200 Fast Cure
Polyurethane
300 psi
A one-part general purpose PU with good adhesion to wood, fiberglass, gelcoat, plastics, and metals. For above and below the waterline.
Yes
2 hrs
1 day
Teakdecking Systems
270 psi
Used for caulking teak boat decks. One-part paste-like oxime cure system which forms a tough yet flexible solid rubber compound.
Yes
1 hr
1 day
Sika 221
Polyurethane
260 psi
Bonds well to a wide variety of substrates and is suitable for making permanent elastic seals of high adhesive strength.
Yes
60 mins
2+ days
3M 4000 UV
Polyether
253 psi
General purpose cosmetic sealant with UV resistance. Great adhesion to metal and will not yellow.
No
1 hr
1 day
Sikaflex 1A
Polyurethane Elastomeric
175 psi
A high-performance, moisture-cured polyurethane-based elastomeric sealant.
Paintable
3-6 hrs
4-7 days
Sika 291
Polyurethane
221 psi
All purpose adhesive sealant that may be used for light bonding. Fast curing.
Yes
60 mins
4 days
Sika 291 LOT
Polyurethane
200 psi
All purpose adhesive sealant. Bonds to hull and structural members. Can be used as a bedding compound. Long open time.
Yes
3-5 hrs
7 days
Boatlife Life Caulk
Polysulfide
170 psi
Use on wood, fiberglass, metal, glass, and itself. Ideal for eak decks, bed decking and hull hardware. Can be applied underwater for emergency repairs.
Yes
24 hrs
7 days

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