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West-System 'A' Pack Standard 1.2kg
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West-System 'A' Pack Standard 1.2kg



105 Resin is the base material of the WEST SYSTEM product range. The resin is a clear, light amber, low viscosity epoxy resin. WEST SYSTEM 105 Resin is designed specifically for use with WEST SYSTEM hardeners. WEST SYSTEM fillers or additives may be added to the epoxy resin and hardener mix to modify the epoxy to suit a range of applications.

WEST SYSTEM 105 epoxy is available in 4 pack sizes: A, B, C or E (1kg, 5kg, 25kg or 225kg respectively). When purchasing resin, hardener and pump sets, please ensure that all items are labelled with the same pack size letter.

Our User Manual can be downloaded for free. We would advise anyone embarking on a project (however large or small) to carefully read all of the relevant sections. The guide shows clearly how to select the appropriate materials, prepare for the work and get the most out of WEST SYSTEM products.
Epoxy Hardeners

There are four WEST SYSTEM hardeners, three to provide working times for almost every kind of project and one for coating where an extra special finish is required. It is essential that the resin and hardener are mixed in the correct ratio. These ratios ensure that a complete chemical reaction occurs which results in optimal performance. The easiest way to achieve the correct ratio, time and time again, is through use of the correct dispensing pumps.

205 Standard Hardener

205 Hardener is used in a majority of situations to produce a rapid cure and results in an epoxy which develops its physical properties quickly. When mixed with 105 resin, the cured system yields a high-strength, rigid solid which has excellent cohesive properties and provides an outstanding moisture vapour barrier with excellent bonding and coating properties.

105/205 Pot Life At 25°C 10 to 15 minutes
Cure To Solid State At 21°C 5 to 7 hours
Cure To Maximum Strength At 21°C. 5 to 7 days
Minimum Recommended Temperature 5°C
Pumps Required (5:1 ratio) 301, 306, 309

205 Hardener must be mixed in the correct ratio of 5 parts by weight of 105 Resin to 1 part by weight of 205 Hard

For more information about the product please follow the link to West-Systems website or phone us.