Bostik® 960SR is a fast skinning, moisture-curing sealant based upon Silyl Modified Polymer (SMP Technology); specifically formulated to withstand harsh marine exposures that are encountered in "above deck" applications. 960SR eliminates the damaging effects of UV (non-yellowing, non-chalking, non-cracking) that boat builders and owners have expected with other unconventional urethane and silicone sealants. Unlike conventional silicone sealants, it is sandable and paintable. Unlike conventional urethane sealants, it can be tooled before skin formation using isopropyl alcohol (water or soapy water can also be used). 960SR has better adhesion to porous and non-porous surfaces than silicone; but ,unlike urethanes (where disassembly may occur) it will NOT damage or "pull" gelcoat.