109 Basecoat - is used to promote a better bonding surface for painting when using a shore 20A or higher/harder silicone. 109 Basecoat is brushed or poured into an open mold to form a surface "skin" prior to filling the mold with harder silicone. Can also be used as a soft skin encapsulator for Gel-filled silicone appliances. Must be used with 109 "Basecoat Part A" NOT normal FuseFX Part "A".