west system 207-sa special clear hardener .66 pt west system use with 105 resin in coating applications where extremely clear finish is desired, especially when working in humid conditions. provides excellent adhesion for bonding applications. contains uv-stabilization additive but still requires long-term uv protection with quality marine paint or varnish. provides 20-26 minutes of pot life at 70°f and will cure to a solid state in 10-15 hours. further hardening occurs over 4-7 days. use with #300 pumps.