How to Seal Tongue & Groove Pine

Written by lisa wampler
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If you recently installed a tongue and groove pine flooring or you want to place a new seal on an existing pine floor, you do not have to call a professional floor finisher to complete the task for you. You can rent a walk-behind sander from a home improvement retailer and complete the task on your own. Before you know it, you will have a perfectly sealed tongue and groove pine floor. It is important to seal a pine floor to protect it from damage since pine is softer than most woods used for flooring.

Skill level:
Moderately Easy

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Things you need

  • Blue painter's tape
  • Plastic sheeting
  • Walk-behind sander
  • Clean rags
  • Naphtha
  • Power sprayer
  • Rollers (optional)

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Instructions

  1. 1

    Remove all of the furniture and carpet from the room that could prevent you from successfully completing your task. Remove any floor register vents and cover them with blue painter's tape. If you have any wall register vents, cover them with tape to prevent pine dust from getting into your ductwork.

  2. 2

    Place plastic over the doorways that connect to the room and secure them closed with blue painter's tape. If the doorways have a door, you can forgo this step and simply close the door while you work.

  3. 3

    Sand the old finish off the tongue and groove pine floor with a walk-behind sander. If the flooring is new with no sealer on it, sand the floor lightly with a walk-behind sander to scuff the floor. This gives the sealer something to grip.

  4. 4

    Wipe the dust off the flooring with clean rags and naphtha.

  5. 5

    Stain the floors if you do not want to retain the natural pine look. Use clean rags and wood stain or you can use a low-pressure sprayer like a Wagner power sprayer to spray the floor and then wipe the excess stain off with rags. Allow the stain adequate time to dry before moving on.

  6. 6

    Spray or roll polyurethane onto the pine flooring in three thin coats allowing adequate drying time between coats. You can use a power sprayer with a polyurethane nozzle attachment, or you can roll the polyurethane on with rollers.

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