Last year I pulled the below deck access covers, and put new sealant around them. Within this time, the sealant has yellowed and become VERY brittle, definitely not 'sealing' anything anymore.<br /><br />I have since pulled the cover off, and need to re-seal them. They are just the round screw on access covers.<br /><br />MY question is this: What kind of sealant should i use? It needs to stay flexible if possible. <br /><br />White or clear is preferred. <br /><br />Also, what should I use when re-mounting my engine? 5200?<br /><br />Thanks<br />Shawn