{HEAD ~ The present invention} is based on {TAIL ~ the discovery} that concentration levels of copper acetylacetonate considered ineffective by the prior art will effectively retard thermally induced hardening of fluorosilicone gels prepared by a hydrosilylation reaction using curable compositions containing an N,N,N,N tetraalkyl alkylenediamine as a catalyst inhibitor 
is based on
{ HEAD ~ The present invention } is based on { TAIL ~ the discovery } that concentration levels of copper acetylacetonate considered ineffective by the prior art will effectively retard thermally induced hardening of fluorosilicone gels prepared by a hydrosilylation reaction using curable compositions containing an N , N , N , N tetraalkyl alkylenediamine as a catalyst inhibitor
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