Donseal SL445® One component elastomeric self-levelling polyurethane sealant (Formerly known as Flexseal SL445) You might also be interested in Flexseal PU440 One component, non sag, elastomeric polyurethane sealant with high tear and weather resistance
Flexseal PU440 One component, non sag, elastomeric polyurethane sealant with high tear and weather resistance