West System 207-SA Special Clear Hardener

Name: West System 207-SA Special Clear Hardener - Premium Epoxy Hardener
Brand: West System
SKU: US-GR-AM-DG-B0007XLTL4
Price: 104.99 USD
Availability: InStock

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West System 207-SA Special Clear Hardener

Regular Price: US$129.99

Special Price US$104.99

Availability: In stock

Supplier: West System

Category: Automotive Replacement Parts

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Popular Uses of WEST SYSTEM Epoxy


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 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.


	105 Resin/205 Fast Hardener	105 Resin/206 Slow Hardener	105 Resin/207 Special Clear Hardener	105 Resin/209 Extra Slow Hardener
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.

Pair with WEST SYSTEM 105-A Epoxy Resin. POT LIFE AT 72°F (22°C) is 20 to 26 minutes. Cures to a solid state in 10 to 15 hours. Cures to maximum strength in 4 to 7 days. Minimum recommended working temperature is 60°F (16°C). Does not contain VOCs and has relatively high flash point and no solvent odor, making it much friendlier to use than styrenated resins. STRUCTURAL BONDING PROPERTIES are similar to other 105/20X resin and hardener combinations. Easily modified with WEST SYSTEM fillers, pigments, and additives to suit an enormous variety of construction and repair projects, including fiberglass boat repair, strip kayak and canoe construction. THIS WATER-CLEAR EPOXY curing agent was developed for coating and fiberglass cloth application where an exceptionally clear, moisture-resistant, natural wood finish is desired. Mix it with WEST SYSTEM 105 Epoxy Resin at a 3-parts resin to 1-part hardener ratio. BLUSH-FREE 207 SPECIAL CLEAR HARDENER is an excellent choice for clear coating application. Blended with 105 Epoxy Resin, 207 Hardener will not blush or turn cloudy in humid conditions. Thin film applications roll out and tip off smoothly, requiring less sanding in preparation for finish coatings.

Item Weight: 14.4 Ounces. Style: Compact. Color: Clear. Brand: West System. Material: Resin. Best Sellers Rank: See Top 100 in Sports & Outdoors. Country of Origin: USA. : B0007XLTL4. Manufacturer: Gougeon Brothers, Inc. Date First Available: February 26, 2010. Department: Epoxy. Item model number: 207-SA. Product Dimensions: 1.8 x 3.8 x 6.4 inches; 14.4 Ounces. Is Discontinued By Manufacturer: No.