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105-K Fiberglass Boat Repair Kit

4.6 4.6 out of 5 stars 666 ratings
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  • EACH KIT CONTAINS eight packets of WEST SYSTEM 105 Resin and 205 Fast Hardener, fiberglass fabric, adhesive filler, fairing filler, glue brushes, mixing pots, a reusable mixing stick, an application syringe, three pairs of protective gloves and illustrated instructions for completing a variety of common fiberglass repairs.
  • REPAIR CRACKS & SCRAPES, gelcoat blisters, loose hardware, delaminated decks and panels, damaged keels and holes up to 1″ diameter in solid laminates up to ¼” thick, and smaller holes in thicker laminates.
  • ALL COMPONENTS are contained in a sturdy, resealable package that can be easily stowed aboard your boat.
  • 105-K Fiberglass Boat Repair Kits are designed for small, quick repairs for: Fiberglass Reinforcing fabrics Composite materials

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Product Description

Popular Uses of WEST SYSTEM Epoxy

A structural fillet for bonding with WEST SYSTEM Epoxy

The bow of a strip canoe fiberglassed and clear coated with WEST SYSTEM Epoxy

Rocks cast in WEST SYSTEM 105 Resin/207 Special Clear Hardener

Bonding & Filleting

WEST SYSTEM Epoxy is excellent for structural bonding and fillets. It can be easily thickened with a number of fillers to modify consistency and strength.

There are two types of structural bonding that can be done with epoxy.

TWO-STEP BONDING is the preferred method for most situations because it promotes maximum epoxy penetration into the bonding surface and prevents epoxy-starved joints.

SINGLE-STEP BONDING is appropriate when joints will have minimal loads and excess epoxy absorption into porous surfaces is not a problem. In both cases, epoxy bonds best when it is worked into the surface with a roller or brush.

Coating, Laminating & Clear Finishing

COATING AND LAMINATING are popular uses of WEST SYSTEM Epoxy. Epoxy wets out fiberglass cloth, protecting the substrate while letting its beauty shine through. We recommend WEST SYSTEM 105 Resin with blush-free, water-clear 207 Special Clear Hardener for bright finishes and clear coats.

COATING involves rolling the epoxy onto a surface with a foam roller, applying it with a brush, or spreading the epoxy over the surfaces with a plastic spreader. .

There are two methods for laminating with fiberglass and epoxy.

THE DRY METHOD refers to placing the cloth over a dry surface, wetting the cloth with epoxy and spreading the epoxy over the cloth, smoothing it as you go.

THE WET METHOD involves applying the cloth to an epoxy-coated surface after the wet-out coat becomes tacky, which helps it cling to vertical or overhead surfaces. This method makes it more difficult to position the cloth, so the dry method is the preferred, especially when using with thinner cloth.

Clear Casting & Pouring

CASTING AND POURING are best done with WEST SYSTEM 105 Resin and 207 Special Clear Hardener.

AVOIDING UNCONTROLLED EXOTHERM is important, as this heat reaction can quickly spoil the casting.

Epoxy cures by exothermic (heat) reaction. That heat must be kept under control when when creating a thick casting (greater than ¼”). For thick castings, add epoxy in multiple layers . When the first pour is tacky like the back of masking tape, a second pour can be made. When the epoxy cures enough to become tacky, it means the previous layer has begun to cool down and will not contribute heat to the next layer. Adding another layer at this stage allows you to skip any surface prep.

If the poured epoxy casting cures past the tacky stage, allow the epoxy to finish curing then sand ot dull and clean the surface before applying the next epoxy layer. This will ensure good adhesion between layers.

WEST SYSTEM Epoxy products come in an array of versatile formulations

Versatile, reliable WEST SYSTEM products

WEST SYSTEM offers high-quality epoxy resins, hardeners, fillers, and additives. Developed by our in-house chemists, our formulations are proprietary, structural, and marine grade. These epoxies have set the standard for epoxy quality in the marine industry and beyond since 1969.

Versatile WEST SYSTEM Epoxy meet the highest standards for reliability, consistency, and product support.

Fiberglass boat repaired with WEST SYSTEM Epoxy

A beautiful strip canoe built with WEST SYSTEM Epoxy by David Wohl.

James Macdonald built the Eat a Peach Tribute Guitar using marquetry skills and WEST SYSTEM Epoxy.

Detail work on this Victorian home was repaired with WEST SYSTEM Epoxy.

Fiberglass Boat Repairs & Construction

This vintage 15' Larson Thunderhawk was repaired with WEST SYSTEM Epoxy.

Damage from collisions, groundings, the forces of nature, and aging make it common for fiberglass boats to need repairs.

Effectively repairing a fiberglass boat requires a superior structural adhesive, that adheres to polyester resin, fiberglass, wood, metal and other materials.

Unlike polyester resin which can shrink from 5% to 8%, creating stress concentrations at the repair joint, epoxy doesn’t shrink. It's also a more effective moisture barrier. Epoxy forms a tenacious mechanical bond with cured polyester and other materials in secondary bonding. Since epoxy is more durable than polyester, the epoxy repair may be even stronger than the original structure.

Ease of use, ready availability, safety, and easy access to how-to information makes WEST SYSTEM Epoxy excellent for fiberglass boat repair.

Wooden Boat Construction & Repairs

This strip canoe was built with WEST SYSTEM Epoxy.

Wood is the primary building material for many of today’s most durable and most beautiful boats, whether canoes, kayaks, dories, sailboats or power boats. Many of the wood/epoxy construction techniques that have made modern wooden boats so successful can also be applied to the repair of older wooden boats with excellent results.

Gougeon Brothers, Inc., the company that has been formulating and manufacturing WEST SYSTEM Epoxies since 1969. They pioneered the use of epoxy to enhance wood's natural structural properties.

Ease of use, ready availability, safety and easy access to instructional materials makes WEST SYSTEM Epoxy a great choice for wooden boat construction and repairs.

Furniture & Crafts

The Eat a Peach Tribute Guitar using marquetry skills and WEST SYSTEM Epoxy.

Whether you're creating a river table, casting jewelry and works of art, making high-end knives, repairing sporting equipment, creating sculptures for public spaces, designing cosplay props, or building or repairing musical instruments, WEST SYSTEM Epoxy is versatile and reliable.

Woodworkers and creators of all kinds depend on WEST SYSTEM Epoxy.

Home Repairs & Improvements

The detail work on this Victorian home was repaired with WEST SYSTEM Epoxy.

Homeowners rely on WEST SYSTEM Epoxy because it's versatile, reliable, readily available, consistent, and offers excellent instructional materials.

WEST SYSTEM customers have used it to create spiral staircases, grand entry columns, and cherry wood basins. They've used it to build fences, trellises, and planter boxes, and neighborhood mini-libraries that can withstand decades outdoors. And to repair everything from porches and wooden window sashes to fiberglass tub and shower surfaces.

Ease of use, ready availability, safety, and easy access to how-to information makes WEST SYSTEM Epoxy an ideal adhesive and coating for lasting home repairs.

WEST SYSTEM Product Selection Guide

WEST SYSTEM 105 Resin can be paired with one of 4 hardeners and modified with fillers & additives.

How to choose the right WEST SYSTEM Epoxy products for your project:

1. Start with 105 Epoxy Resin, the basic ingredient of all WEST SYSTEM Epoxy compounds. Use 300 Mini Pumps for convenient and accurate metering.

2. Mix with one of four WEST SYSTEM hardeners. Select a hardener for its intended use and for the cure speed best suited for your job in the temperature range in which you are working.

3. Add one of six WEST SYSTEM fillers to thicken the mixture as needed. Select a filler for its handling characteristics or cured physical properties. Or, add WEST SYSTEM additives to provide specific coating properties. WEST SYSTEM pigments can be used to change the epoxy's color.

WEST SYSTEM 205 Fast Hardener WEST SYSTEM 206 Slow Hardener WEST SYSTEM 207 Special Clear Hardener WEST SYSTEM 209 Extra Slow Hardener
105 Resin/205 Fast Hardener 105 Resin/206 Slow Hardener 105 Resin/207 Special Clear Hardener 105 Resin/209 Extra Slow Hardener
Customer Reviews
4.8 out of 5 stars
197
4.8 out of 5 stars
269
4.8 out of 5 stars
21
4.1 out of 5 stars
6
Mix ratio, resin:hardener 5:1 w/105 Resin 5:1 w/105 Resin 3:1 w/105 Resin 3:1 w/105 Resin
Pot life @72°F 12 minutes 21.5 minutes 22 minutes 62 minutes
Working time, thin film @72°F 60 to 70 minutes 90 to 110 minutes 110 to 120 minutes 3 to 4 hours (180 to 240 minutes)
Cures to a solid, thin film @72°F 6 to 8 hours 10 to 15 hours 10 to 15 hours 20 to 24 hours
Cures to working strength @72°F 1 to 4 days 1 to 4 days 1 to 4 days 4 to 9 days
Minimum working temp 40°F (4°C) 60°F (16°C) 60°F (16°C) 70°F (4°C)
Hardness (Shore D) ASTM D-2240 83 83 84.4 82
Compression yield (ASTM D-685 11,400 psi 11,500 psi 11,000 psi 12,000 psi
Tensile strength ASTM D-638 7,900 psi 7,300 psi 6,750 psi 7,300 psi
Flexural strength ASTM D-790 14,100 psi 11,800psi 11,300 psi 12,500 psi
The staff of Gougeon Brothers, Inc., formulator and manufacturer of WEST SYSTEM Epoxies.

An ISO 9001:2015 certified company

Founded in 1969, Gougeon Brothers, Inc. (GBI) formulates and manufactures WEST SYSTEM products. In 2020, NSF International recertified GBI's ISO 9001:2015 status, which ensures consistency in epoxy formulation, production, packaging, and instructional materials.

Product information

Technical Details

Additional Information

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105-K

105-K Fiberglass Boat Repair Kit


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Important information

Safety Information

DANGER HARMFUL IF SWALLOWED. HARMFUL IF ABSORBED THROUGH THE SKIN. MAY CAUSE CHEMICAL BURNS TO EYES AND SKIN. May cause allergic reaction. Avoid skin and eye contact. Do not ingest. Wear protective gloves and eye protection. FIRST AID SKIN – wash with soap and water. EYES – flush with water for a least 15 minutes. Consult physician. INGESTION – Do not induce vomiting. Consult physician. KEEP OUT OF REACH OF CHILDREN

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Customer reviews

4.6 out of 5 stars
4.6 out of 5
666 global ratings

Customers say

Customers like the quality, ease of use, and durability of the gun cleaning kit. They mention that the directions are well written and easy to follow. They appreciate the individual epoxy packets, which make mixing small quantities of epoxy very easy. Customers also appreciate the durability of product, saying that it holds up pretty well. Opinions are mixed on the value of the product.

AI-generated from the text of customer reviews

56 customers mention53 positive3 negative

Customers are satisfied with the quality of the gun cleaning kit. They mention that it works great, has easy-to-follow directions, and is perfect for small repairs. The satchet packs are excellent for scaling the amount of epoxy resin, and the repair is holding up.

"Maybe not the best option, but it was easy to repair a small spot on my kevlar canoe." Read more

"...It also worked great, and fixed the hole in my Sunfish. Only reason I rate it 4 instead of 5 stars is that it had way more stuff than I needed...." Read more

"...kit to fill holes in a fiberglass boat from a wakeboard tower, worked pretty well, I reinforced the underside with marine plywood and fiberglass,..." Read more

"...allows amateurs like me to try it at an inexpensive price while making it foolproof. I'm now comfortable trying more complicated projects." Read more

34 customers mention31 positive3 negative

Customers find the gun cleaning kit easy to use. They mention the directions are well written and easy to follow. Some say the product is great for repairs and easy for amateurs to use and mix.

"...time I’ve bought this product and extremely happy with it … easy to use and mix .. only mix one pouch at a time though…" Read more

"This fiberglass kit was very complete, and came with easily understood instructions. It also worked great, and fixed the hole in my Sunfish...." Read more

"...Application was really easy, and the keel looks great! However, on the transom repair, I thought I could work the fiberglass into uneven areas...." Read more

"...Surprisingly easy to work with if you follow the instructions." Read more

5 customers mention5 positive0 negative

Customers find the individual epoxy packets and brushes in the gun cleaning kit convenient and easy to use. They also appreciate the pre-measured amounts of epoxy and hardener.

"...The way that it is packaged, the pre-measured amounts of epoxy and hardener, the included tools and instructions add up to a "no way to fail"..." Read more

"Used this kit to repair a small crack in SMC hull. Plenty of epoxy and filler leftover. So far my repair is holding up...." Read more

"...It was nice to have gloves, individual epoxy packets, and brushes. Product was easy to use although epoxy is a little messy. Did the job well...." Read more

"...I really like the extras that come with it and the convenient small batch packages of resin/ hardner, perfect for small jobs, without making a mess." Read more

3 customers mention3 positive0 negative

Customers are satisfied with the durability of the gun cleaning kit. They mention that it holds up pretty well on their fiberglass boat, and the epoxy is as stable as stated in the instructions.

"...Repaired both sides of the boat and still had plenty left over. Seems to hold good and is very solid...." Read more

"...After curing, the epoxy is as stable as stated in the instruction...." Read more

"Holds up pretty well on my fiberglass boat...." Read more

3 customers mention3 positive0 negative

Customers find the gun cleaning kit a great way to fill holes. They say it works well and fixes holes in their boats. Some customers even laminate the entire boat with the filler.

"...It also worked great, and fixed the hole in my Sunfish. Only reason I rate it 4 instead of 5 stars is that it had way more stuff than I needed...." Read more

"...The filler was so good to work with that I started laminating the entire boat with it to fill small cracks and scratches and plan on giving it a..." Read more

"Great way to fill holes..." Read more

3 customers mention3 positive0 negative

Customers like the pre-measured packets in the gun cleaning kit. They say the packets are handy for on-the-go repairs and the epoxy is measured perfectly, so you don't waste any.

"...You need to thicken it as the kit describes, the pre measured packets are nice, all the accessories are good...." Read more

"...The packets are handy for your "on the go " tool box to do small repairs that require epoxy...." Read more

"...Best part is that the epoxy is measured perfectly, so you dont waste any." Read more

11 customers mention7 positive4 negative

Customers are mixed about the value of the gun cleaning kit. Some mention it's good value, economical, and goes a long way, while others say it'd be better to find a cheaper one.

"...I had no idea how to fix this. but came across this product which was cheap. I am overwhelmed with how amazingly stong the canoe is now...." Read more

"...The cost seems a little high but so far I think it's worth the cost to do a great job." Read more

"...A bit pricy, but when it saves you a trip back to a job it is well worth it...." Read more

"...The epoxy goes a long way, and so the kit is more economical than it might initially appear.Overall I would recommend this kit." Read more

This is a great kit for a small fiberglass repair
5 Stars
This is a great kit for a small fiberglass repair
The kit had everything I needed to repair the nose of my WaveRunner.
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Top reviews from the United States

Reviewed in the United States on September 18, 2023
Reviewed in the United States on September 30, 2023
Reviewed in the United States on September 25, 2023
Reviewed in the United States on July 6, 2021
7 people found this helpful
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Reviewed in the United States on January 1, 2024
Reviewed in the United States on August 4, 2023
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5.0 out of 5 stars This is a great kit for a small fiberglass repair
Reviewed in the United States on August 4, 2023
The kit had everything I needed to repair the nose of my WaveRunner.
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Reviewed in the United States on April 3, 2021
7 people found this helpful
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Top reviews from other countries

Mike D
5.0 out of 5 stars Was not sure what to expect
Reviewed in Canada on January 19, 2022
Dilleswara Rao
5.0 out of 5 stars Excellent
Reviewed in India on January 17, 2022
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Dilleswara Rao
5.0 out of 5 stars Excellent
Reviewed in India on January 17, 2022
Excellent working
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Amy
5.0 out of 5 stars Very Strong!
Reviewed in Canada on November 30, 2021
One person found this helpful
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Amazon Customer
4.0 out of 5 stars long wait, easy to use, cheap quality brushes
Reviewed in Canada on August 30, 2018
2 people found this helpful
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Mike Tsai Chung Huang
5.0 out of 5 stars Good
Reviewed in Canada on June 27, 2019