Answer by  
                                                                                          Rogbog (203)
                                                            
                          
                          
                                                          First, clean the wood gate very well, then use a high quality wood stain.  Spread it on liberally and allow it to dry and set up for an hour or more.  Then apply a polyurethane sealant.  Spread the polyurethane sealant liberally coating the entire wooden gate make sure no spots are missing.