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5.2 proved respirator with an organic vapor cartridge. Provide ventilation and wear a dust mask when sanding epoxy, especially uncured epoxy. Breathing uncured epoxy dust in- creases your risk of sensitization. Although epoxy cures quickly to a sandable solid, it may take over two weeks at room temperature, or post-curing, to cure completely. 4. Avoidingestion.Washthoroughlyafterhandlingepoxy,especiallybeforeeatingorsmok- ing. If epoxy is swallowed, drink large quantities of water—DO NOT induce vomiting. Be- cause hardeners are corrosive, they can cause additional harm if vomited. Call a physician immediately. Refer to First Aid procedures on the Material Safety Data Sheet. 5. KEEP RESINS, HARDENERS, FILLERS AND SOLVENTS OUT OF THE REACH OF CHILDREN. For additional safety information or data, write to: EPOXY SAFETY, Gougeon Brothers, Inc., P.O. Box 908, Bay City, MI 48707 USA or visit www.westsystem.com. 5.1.1 Cleanup Contain large spills with sand, clay or other inert absorbent material. Use a scraper to con- tain small spills and collect as much material as possible. Follow up with absorbent towels. Uncontaminated resin or hardener may be reclaimed for use. DO NOT use saw dust or other fine cellulose materials to absorb hardeners. DO NOT dispose of hardener in trash containing saw dust or other fine cellulose materials—spontaneous combustion can occur. Clean resin or mixed epoxy residue with lacquer thinner, acetone or alcohol. Follow all safety warnings on solvent containers. Clean hardener residue with warm soapy water. Clean 207 Hardener residue with alcohol. Dispose of resin, hardener and empty containers safely. Puncture a corner of the can and drain residue into the appropriate new container of resin or hardener. DO NOT dispose of resin or hardener in a liquid state. Waste resin and hardener can be mixed and cured (in small quantities) to a non-hazardous inert solid. CAUTION! Pots of curing epoxy can get hot enough to ignite surrounding combustible materials and give off hazardous fumes. Place pots of mixed epoxy in a safe and ventilated area, away from workers and combustible materials. Dispose of the solid mass only if cur- ing is complete and the mass has cooled. Follow federal, state or local disposal regulations. Epoxy products This section provides a short description of WEST SYSTEM resin, hardeners and fillers. Re- fer to the current User Manual & Product Guide for complete information on all WEST SYSTEM products. 5.2.1 105 Resin and hardeners Resin 105 Epoxy Resin®—A clear, low-viscosity, epoxy resin that can be cured in a wide tempera- ture range to yield a high-strength, rigid solid which has excellent cohesive properties and is an outstanding bonding adhesive and moisture vapor barrier. WEST SYSTEM 105 Resin is formulated for use with four different WEST SYSTEM hardeners. Use the Hardener Selec- tion Guide (Figure 5-1) to select the hardener most suited for your application. Hardeners 205 Fast Hardener®—Used for general bonding, barrier coating and fabric application. Formulated to cure at lower temperatures and to produce a rapid cure that develops its physical properties quickly at room temperature. 5:1 mix ratio. 206 Slow Hardener®—Used for general bonding, barrier coating and fabric application. Formulated for a longer working and cure time or to provide adequate working time at higher temperatures. 5:1 mix ratio. Using WEST SYSTEM® Epoxy 31 5PDF Image | Vacuum Bagging Techniques 002150
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