Deck Sealers

Deck sealants, water sealers, or water repellants are often used by those that choose to have a wood with a very natural look as they are clear coatings. Deck sealants will increase the deck's durability, ensure the wood is better preserved and minimize decay.

A deck sealer should provide water repellency and protection from ultraviolet rays. Some also believe that sealers that fight mildew or algae are an exceptionally good idea for decks that are prone to these types of infestation.

Clear or translucent sealers give most wood a glow but do not alter the color dramatically. Clear sealers are great in that any uniformity in application does not stand out the same way as it does with stains that color. Clear sealers can have a base of water or oil. Oil based sealers tend to better penetrate wood thereby offering more protection but require more effort and time in regards to clean up.

The type of deck sealer will depend on the type of wood on your deck as well as whether there is already a coating on it. Sometimes a stripper will be needed to remove any previously applied varnish or paint. Deck sealants can be sprayed, brushed or rolled on but need to be applied only when the deck is completely dry and clean.

Penetrating finishes are often recommended over their film-forming counterparts. Many feel penetrating finishes are superior as they absorb into the wood which offers more thorough protection. Film-forming sealers in contrast work by forming a coating around the wood.

Deck paint is often not advised as paint is less able to deal with the wear and tear of a deck as it does not penetrate, rather is forms a coat over the top. Varnish and polyurethane finishes are also not recommended for these reasons. They are also less effective because they do not provide UV protection that is important. Paint is popular though for deck accessories such as rail posts, spindles and filials.