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105-B Epoxy Resin

Q: What's the ratio of the resin to hardener?

From West System's Instructions for Mixing it reads, "To measure 105 Resin and 205 or 206 Hardener by weight or volume, combine five parts resin with one part hardener. To measure 105 Resin and 207 or 209 Hardener by volume, combine three parts resin with one part hardener (by weight, 3.5 parts resin-1 part hardener)."

Q: 1638 lft of fir porch flooring. how many gallons do i need and any prep work recommended and what stain can i apply? thanks.

West suggests 350-405 sf/gal of 105. You did not indicate width and whether it is 5/4” and tongue and groove. I believe 3 gal will be sufficient for 3 sides and ends, but ymmv. Good surface prep is key, followed by any decent exterior stain, and sufficient drying conditions and time. After curing, exposed surfaces will need uv protection that does not compromise traction in rain and snow.

Q: What pumps should I get for the 105 Epoxy resin and the 207 Hardner?

http://www.westsystem.com/ss/calibrated-pumps-make-accurate-measuring-easy/You have to get the whole set and can't buy them individually. Consequently, if you are using slow hardener and want to change to fast hardener, you have to buy a whole set, but they don't cost that much.

Product ID: 254583366

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Details

Brand
West System
Specific uses for product
Woodworking
Material
Epoxy Resin
Item form
Liquid
Special features
Waterproof

⚡Low-viscosity for easy application

💧Waterproof & moisture vapor resistant

🌡️Wide curing temperature range

Frequently Bought Together

West System 105-B Epoxy Resin

West System 206-B Slow Hardener

West System 205-B Fast Hardener

Description

⚡ Elevate your craft with epoxy that adapts to your vision!

BLUSH FREE CLARITY - Achieve crystal-clear, moisture-resistant finishes even in humid environments.
CUSTOMIZABLE FORMULATION - Easily modified with fillers, additives, and pigments to match your exact needs.
VERSATILE CURING OPTIONS - Choose from 4 hardeners to tailor cure time and finish for any project.
SMOOTH APPLICATION FINISH - Rolls out thin and smooth, reducing sanding and prep time for professional results.
SUPERIOR STRUCTURAL BONDING - Delivers high-strength, durable bonds ideal for demanding marine and industrial uses.

West System 105 Epoxy Resin is a clear, low-viscosity base resin designed for high-strength, waterproof bonding and coating. Compatible with multiple hardeners, it offers flexible curing times and finishes, including a blush-free option for crystal-clear surfaces. Easily customized with additives, it’s the go-to resin for professionals demanding durable, moisture-resistant results in marine, industrial, and creative applications.

Specifications

Color	Clear
Size	No Size
Height	6 inches
Length	6 inches
Weight	10 Pounds
Width	6 inches
Material Type	Aluminum
Number of Items	1
Number of Pieces	1
Season	Year-round
Features	Heat Resistant
Sport	Boating
Included Components	tile-epoxy-adhesives
Batteries Included?	No
Brand	West System
Department	unisex-adult
Manufacturer	West System
Item model number	213637
Product Dimensions	15.24 x 15.24 x 15.24 cm; 2.27 Kilograms

Have a Question? See What Others Asked

What's the ratio of the resin to hardener?

can this be used for sealing a plywood hdroponics grow bed?

1638 lft of fir porch flooring. how many gallons do i need and any prep work recommended and what stain can i apply? thanks.

What pumps should I get for the 105 Epoxy resin and the 207 Hardner?

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