Product Details

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 Sealant Fast Cure 420 is a one-part, general-purpose polyurethane for flexible bonds to wood, fibreglass, Gelcoat, plastic and metals
Forms a watertight seal on joints and boat hardware above and below the waterline
Ideal for rub-rails, stern-joints, deck and through-hull fittings, and access plates
Medium strength allows for disassembly
Size: 3 oz.

Part Number	4200FC
Accessories List	No Accessories Included
Advanced Features	Moisture Resistant, Paintable, UV Resistant
Application Method	Squeeze
Certifications	No Certifications
Consumer Pack Size	1
Dry Colour	Other
Finish	Flat Finish
Full Cure Time (minute)	1440 min
Glue/Paste/Patching Compound Type	Urethane

Grade Rating	Marine
Maximum Temperature (°C)	88.00 °C
Maximum Temperature (°F)	190.40 °F
Minimum Temperature (°C)	-40.00 °C
Minimum Temperature (°F)	-40.00 °F
Non-toxic When Used as Intended	Yes
Number of Pieces	1
Package Depth (cm)	3.00 cm
Package Depth (in)	1.18 in
Package Height (cm)	17.00 cm
Package Height (in)	6.69 in
Package Weight (kg)	0.14 kg
Package Weight (lb)	0.31 lb
Package Width (cm)	5.00 cm
Package Width (in)	1.97 in
Primary Colour	White
Primary Material	Urethane Polymer
Product Height (cm)	3.00 cm
Product Height (in)	1.18 in
Product Length (cm)	17.00 cm
Product Length (ft)	0.56 ft
Product Volume (L)	0.09 l
Product Volume (gal)	0.02 gal (US)
Product Weight (g)	34.27 g
Product Weight (kg)	0.03 kg
Product Weight (lb)	0.08 lb
Product Width (cm)	5.00 cm
Product Width (in)	1.97 in
Set Time (min)	90 min
Suitable Material(s)	Wood, Fiberglass, Plastic, Metal

Warranty

This product carries a 1 year exchange warranty redeemable at any Canadian Tire store.

Online Ordering

Pick Up is free at most stores (some stores require a minimum order value before tax)
Shipping fee is based on size and weight of products and distance from address to store
Same-Day Delivery costs $9.99 per order
Online Ordering Information

Returns

Most products can be returned or exchanged at any Canadian Tire store within 90 days of purchase
Some products are non-refundable and non-exchangeable
The return policy outlined above may not apply to the product you are currently viewing. For complete details and eligibility, please refer to our Return Policy for exceptions.

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Ratings

Consumer Pack Size

Review Highlights

List of Pros Highlights

List of Cons Highlights

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Questions

1 - 3 of 3 Questions

Q: Can you sand this product?

a year ago

2 Answers

A: Yes you can sand 4200

a year ago

Helpful?

Q: What colour is it ?

3 years ago

2 Answers

A: White

3 years ago

Helpful?

Q: Will this seal a leaky rivet on my boat

6 years ago

1 Answer

A: Generally a loose rivet can mean the seam around is also leaking. 3M Marine Adhesive Sealant Fast Cure 4200 will work on clean scuffed aluminum, but you may need to cover a large area.

6 years ago

Helpful?

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± Was price reflects the last national regular price this product was sold for

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* The Triangle Rewards Program is owned and operated by Canadian Tire Corporation, Limited. The Triangle® credit cards are issued by Canadian Tire Bank. Rewards are in the form of electronic Canadian Tire Money® (CT Money®). To collect bonus CT Money you must pay with a Triangle credit card. You cannot collect paper Canadian Tire Money on bonus offers. Any bonus multiplier is based on the base rate of collecting CT Money (0.4%), and will be added to whatever the Member would otherwise collect, without the bonus. Example: On a $100 (pre-tax) purchase with a 20x bonus multiplier a Member would earn a bonus $8 in CT Money (20 X 0.4% X $100). The 30x for Triangle® Mastercard®, World Mastercard® and World Elite® Mastercard® customers consists of the 10x everyday plus a 20x bonus. Not all items sold are eligible to earn CT Money or to be redeemed for. Conditions apply. Visit triangle.com for full program rules and Partner location information. The offered rate is exclusive of any bonus or promotional offers or redemption transactions. CT Money is collected on the pre-tax amount of the purchase. Bonus CT Money may take up to 5 weeks to be applied to the Member’s Triangle Rewards Account. No rainchecks. Must pay with a Triangle credit card. Gift cards and other items excluded.

®/™ Mastercard, World Mastercard, World Elite and the circles are registered trademarks of Mastercard International Incorporated.

†Our Lowest Prices of the Year are defined as the period between January 1–December 31, 2025. Offer excludes localized promotions including but not limited to Grand Openings.

5 out of 5 stars.

Sticks when wet

Verified Purchaser

2 months ago

I usually use the 5200, which really works well, very sticky but was discontinued had to try the 4500 seems to be holding so far.

Good stuff.

3 months ago

Does what it claims. Attached a plastique bloc to fiberglass no problems.

2 out of 5 stars.

Applicator will pop off low quality tube casing

Silicon was good nozzle and treads on tube were the nozzle screws on are worst yet kept on popping off making a mess of my project and wasting lots of silicone

1 out of 5 stars.

Disappointed

4 months ago

I have used this product before and it worked as expected. This time the tube had to be very old at the adhesive was hard and unusable , will try to return it.

3 out of 5 stars.

One and Done!

Good Product, but....

	Only Show Differences	Currently Viewing 3M™ Marine Adhesive Sealant 4000 UV $19.99	3M Marine Grade Silicone Sealant, Clear, 88-ml $19.99	3M™ Marine Premium Filler, 862 g (30.5 oz.) $89.99	Spray Nine® Marine Boat Bottom Cleaner, 946-ml $18.99
Ratings
Consumer Pack Size	1	1	1	12