West System 105 Epoxy Resin

Name: West System 105 Epoxy Resin
Brand: West System
SKU: SWES-105-A
Price: 51.47 USD
Availability: InStock
Rating: 5.0 (3 reviews)

West System 105 Epoxy Resin

SKU:SWES-105-A

$51.47 USD

$51.47 USD ~~$59.19 USD~~

Sale Sold out

Shipping calculated at checkout.

105 in stock

Size: 105-A -- 1 Quart

105-A -- 1 Quart 105-B -- 0.98 Gallon 105-C -- 4.35 Gallon

Quantity

Earn 51 Boat Points Learn More
Ships Today if ordered before 4pm Learn More
Free Shipping on orders over $99 Learn More

West System 105 Epoxy Resin, a trusted product in the marine industry since the 1980s, is renowned for its exceptional bonding and adhesive properties. With unparalleled strength, it is a top choice for its versatility in adhering to various surfaces such as metal, wood, and fiberglass. As a premier adhesive manufacturer, West System has been dedicated to supporting boaters since its establishment in 1969. In addition to their variety of epoxy compounds, their products are also known for their reliability and effective results.

Specifications

Resin Type: Bisphenol-A epoxy
Mix Ratio:
5:1 by volume with 205 Fast or 206 Slow Hardeners
3:1 by volume with 207 Special Clear or 209 Extra Slow Hardeners
Color: Clear to pale amber
Viscosity: 600 cps at 72°F (room temperature)
Cure Time: Depends on hardener used (see individual hardener specs)
Pot Life (100g batch at 72°F):
With 205 Fast: ~10–15 minutes
With 206 Slow: ~20–25 minutes
Coverage: Approximately 12 square feet per mixed pint at 1/8" thickness

Shelf Life: 1+ year (unopened, stored between 60°F–90°F)

Includes

West System Epoxy Resin

* West System Hardener & West System Pump Set sold separately

Features

Versatile application – Ideal for bonding, laminating, coating, sealing, fairing, and molding
Moisture and chemical resistance – Forms a waterproof barrier for long-term durability in marine environments
Low viscosity – Easily wets out fiberglass cloth, carbon fiber, and wood
Blush-free finish with 207/209 hardeners – For clear coating and brightwork
Adjustable working time – Choose from multiple hardeners to fit temperature and project size
Compatible fillers – Blend with West System fillers for tailored performance (fairing, structural, gap-filling)
Strong mechanical properties – Excellent adhesion, tensile strength, and impact resistance
Trusted by professionals – Used in both commercial and DIY boat construction worldwide

View full details

Which West System Hardener Should I Use?

Choose based on temperature, working time, and project type:

Best for cool temperatures or quick repairs.
Ideal for general use in moderate to warm temps.
For clear finishes and brightwork.
Best for hot climates and large laminations.

What filler should I use with West System epoxy?

It depends on your application:

High-strength bonding
Structural bonding
Fairing (easy sanding)
Ultra-lightweight fairing

Can I use chopped strand mat with epoxy resin?

Most CSM is designed for polyester or vinyl ester resin because the binder in standard mat doesn’t dissolve in epoxy. However, epoxy-compatible chopped strand mat is available and should be used if you’re working with epoxy systems.

How much epoxy resin do I need for 1708 biaxial fiberglass?

To wet out a full 50" wide yard of the 1708 biaxial fiberglass you'll need about 30oz of epoxy resin. This is a thick layup with stitched core and mat, which yields a strong result.