Application Method: Surfaces Must Be Clean, Dry, And Free From Grease, Oil, And Dust To Ensure Lasting Adhesion. The Surface Treatment Depends On The Specific Nature Of The Substrates, And Suggestions For Surface Preparation Can Be Found In The Current Edition Of The Appropriate Sika® Pre-Treatments Table. Sikaflex®-591 Can Be Worked With Manual, Pneumatic, Or Electric Extrusion Guns. The Product Can Be Used Between 5 °C And 40 °C, But ariations In Reactiity And Application Properties Should Be Considered As They Can Affect The Final Result. The Optimal Temperature For Substrates And Sealant Is Between 15 °C And 25 °C. In Case Of Contact With Polyurethane, Make Sure That Such Products Are Cured Or Wait At Least 24 Hours Before Sealing. Tooling And Finishing Should Be Done Within The Skin Formation Time Of The Sealant. The Use Of Sika® Tooling Agent N Is Recommended. Other Finishing Agents Should Be Tested For Suitability And Compatibility Before Use. Sikaflex®-591 That Has Not Cured Can Be Remoed From Tools And Equipment With Sika® Remoer-208 Or Another Suitable Solent. Once Cured, The Material Can Only Be Mechanically Remoed. It Is Recommended To I mmediately Wash Hands And Exposed Skin Areas With Hand Cleaning Wipes Such As Sika® Cleaner-350H Or A Suitable Industrial Hand Cleaner And Water. Do Not Use Solents On The Skin.