{Waterproofing|Water-proofing} {Sealant|Sealer}. You {can|are able to} apply {a waterproof|a water resistant|a water-proof|a water-resistant} {sealant|sealer} to {protect|safeguard} a wood fence. ...
{Waterproofing|Water-proofing} Paints. You {can|are able to} {waterproof|water-proof} fences by {painting|coating} them with {waterproof|water-proof|water-resistant} or moisture-resistant paint. ...
Wax Polish. You {can|are able to} {waterproof|water-proof} {a wood|a wooden} fence by {polishing|buffing} it with wax polish.