West System Epoxy A Pack; 105 Epoxy Resin 1Kg+ 206 Hardener Slow 0.2Kg

Surface Preparation: The area to be coated or bonded must be clean, dry, and abraded, free from previous surface coatings, oil, grease, etc.. Seek advice from your distributor when bonding aluminium, stainless steel and copper alloys.

Working Conditions: Best results are obtained undercover at temperatures in excess of 15°C and at low relative humidity. For application of WEST SYSTEM epoxy at low temperatures, please seek advice from your distributor.

Mixing: 5 parts by weight or volume of 105 Resin to 1 part by weight or volume of either 205 or 206 Hardener or use WEST SYSTEM 301-5 Mini Pumps for accurate dispensing of the two components.

Pot Life and Cure Time: A 100g batch of 105 Resin/205 Hardener will gel in 15 to 20 minutes at 18°C and achieve a workable cure in 5 to 7 hours. The cured system must not be subjected to high loads for 48 hours. A 100g batch of 105 Resin/206 Hardener will gel in 25 to 30 minutes at 18°C, and this system should not be used below this temperature. NOTE: To increase the working time available, pour the mixed resin and hardener into a WEST SYSTEM 802 Roller Tray to dissipate the heat of reaction.

Basic Application Techniques:

1. Coating: (a) Interior surfaces – apply the mixed epoxy to the prepared surfaces. Cure overnight, dry sand (first 80 grit, then 120 grit), remove sanding dust and apply second coat of epoxy. (b) Exterior surfaces – as above but apply a third coat when previous coating is touch dry. If more than 12 hours elapses before third coating is applied, the second coating must be sanded to achieve ultimate intercoat bond strength. NOTE: When coating at low temperatures an amine “blush” sometimes occurs. This must be removed before further applications of epoxy are applied. Wash the surface with WEST SYSTEM 855 Cleaning Solution, followed by clean water, using an abrasive pad. Dry the surface with clean paper towels. Sand remaining glossy areas with 80 grit paper. See Technical Manual for further information.

2. Bonding: (a) Pre-wet the surfaces, with the resin/hardener mix. (b) As soon as the ‘wetting’ coat has been applied, prepare an epoxy/filler mix to a paste-like consistency (first mix resin/hardener and then slowly add selected filler) and apply to one of the mating surfaces – for general bonding add 3-5% of 406 filler; for bonding/gap filling add 7-10% of 403 filler. Bring the two components together, temporarily fix into position and retain until cure. Use only enough pressure to maintain good contact, thereby avoiding excessive squeeze-out of epoxy. Remove excess epoxy before cure.

3. Filleting: (a) Pre-wet the two surfaces with the resin/hardener mix. (b) Prepare a thickened epoxy mix – first mix resin/hardener and then slowly add selected filler to achieve a putty-like consistency – and apply to the joint and shape with the rounded end of a mixing stick or a similar tool. Remove excess epoxy before cure.

4. Overcoating: Most good quality yacht paints will adhere to the epoxy coated surface. Allow 48 hours after application of final coat of epoxy before thoroughly wet sanding (120 to 180 grit) the surface. Clear away sanding dust and dry the surface with clean paper towels. When the surface is dry apply chosen coating following the manufacturer’s instructions. NOTE: If applying anti-fouling it may be necessary to apply a primer to the epoxy surface – follow the coating manufacturer’s advice. If applying varnish, we recommend using a two part polyurethane containing a UV inhibitor. Prepare the surface as outlined above.

Coverage:

Coating: 1kg of mixed WEST SYSTEM epoxy covers between 6.5 and 8.5m² dependent upon the type of surface being coated. Bonding or Laminating Timber: 1kg of mixed epoxy and filler will cover 2.0 to 4.0m² . For Use with Glass Cloth: 1kg of mixed epoxy will cover 2.0 to 5.0m² depending on the type and weight of glass cloth used. Store above 10°C. Crystals can form in epoxy if stored below 10°C. To reverse, gently warm the resin in the container and refer to the WEST SYSTEM User Manual.