How to Spray Thompson's Water Seal on Landscape Rock

Written by jennifer williams Google
  • Share
  • Tweet
  • Share
  • Email

Thompson's Block Paving Seal, made by Thompson's Water Seal, is a spray-on product perfect for sealing garden landscape rock. Landscape rock is used for a variety of aesthetic purposes in the garden. It is important to keep the landscape rock free of fungal growth, mould and mildew that grow when water is allowed to saturate the rock. Thompson's Block Paving Seal by Thompson's Water Seal is a simple spray-on product that prevents unsightly growth and discolouration of landscape rock.

Skill level:

Things you need

  • Bucket
  • Water
  • Germicidal cleaner or bleach
  • Wire brush
  • Thompson's Block Paving Seal
  • Sprayer
  • Landscape rock

Show MoreHide


  1. 1

    Purchase Thompson's Block Paving Seal, which is designed for use on landscape rock and other porous surfaces.

  2. 2

    Add germicidal cleanser or bleach to an empty cleaning bucket and dilute it with the appropriate amount of water according to the instructions on the product's container. Clean the landscape rock with the cleaner and a wire brush to ensure all dirt and any foreign growth is removed from the rock's surface.

  3. 3

    Allow the landscape rock to dry completely after cleaning.

  4. 4

    Pour the Thompson's Block Paving Seal into a sprayer without diluting. Make sure the nozzle is set to provide a fine, thin spray rather than a stream of sealant.

  5. 5

    Spray the Thompson's Block Paving Seal over the landscape rock using consistent, slow passes of the spray until the rock is covered with a thin, even amount of sealant. Follow the contour of the rock so that the entire surface of each rock is sealed.

  6. 6

    Wait at least 48 hours for the sealant to dry and repeat with a second coat of sealant, applying the second coat in the same way as the first, with slow, even passes of spray.

  7. 7

    Let the sealant dry for another 48 hours before exposing the rock to any use.

Tips and warnings

  • Use a pressure washer on landscape rock to clean it before applying the sealant.
  • For especially porous or thirsty rock, it may be necessary to use more than two coats. Sprinkle water on the rock after the second coat has dried for 48 hours to determine if a third coat is needed. If the water beads and the rock beneath does not darken with absorbed water, the rock is properly sealed. If the water soaks into the rock, a third coat is needed.

Don't Miss

  • All types
  • Articles
  • Slideshows
  • Videos
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the site, you consent to the use of cookies. For more information, please see our Cookie policy.