Landscape Block Adhesive - Carton - 28 oz Tubes

Name: Landscape Block Adhesive - Carton - 28 oz Tubes
Brand: Mainline Materials - V
SKU: APU28
Price: 280.58 USD
Availability: InStock

$280.58

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SKU APU28

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Building a block wall? Fire pit? Or a mailbox? SRW’s Landscape Block Adhesive (Rapid-Set Polyurethane) effectively provides a tight hold for any landscape block project. The adhesive has a fast setup time, can be used on both dry and damp surfaces and is compatible in areas that reach high temperatures such as fire pits or outdoor kitchens. SRW’s Rapid-Set Polyurethane adhesive can be used on both indoor and outdoor concrete block projects. See below for all of the other materials for which Rapid-Set Polyurethane adhesive is compatible.

This product is VOC compliant.

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Contains a carton of 12 tubes of 28 oz each.

Product Info

Model: APU 28
Brand: SRW
Size: Carton of 12 tubes of 28 oz each.
Safety Data Sheet: Download PDF
Installation Guidelines: Download PDF

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All items ship for free (standard ground, see map)
Call: (800) 604-5537 for pricing and shipping questions.

This material ships from either California, Minnesota, New Jersey or Georgia. Orders typically ship same day (if placed before 12 PM EST)

Note: The day that the order ships does not count as a transit day. We are unable to expedite fabric shipments faster than what is displayed on the map below.

Product Benefits:

Fastest set-up time on the market
Designed for construction and landscape projects
Suitable for dry or damp surfaces
High temperature compatible
Interior/exterior applications
Premium, long-lasting strength
12 month shelf life

Product Applications:

Retaining walls
Pavers
Concrete
Pool Copings
Foam/Vinyl/PVC
Bricks
Firepits
Metals
Wood
Natural stone

Note: The following is general advice for building a retaining wall. Mainline Materials does not guarantee the accuracy of the following information or whether is is appropriate for your specific installation site. Please contact a licensed contractor or engineer for site specific installation advice, direction and installation services.

Learn How To Build A Retaining Wall

Retaining walls work to keep landscape soil from eroding while providing an aesthetic look that offers a beautiful appearance to your yard. Retaining walls are used to keep the soil at two different elevations for areas that have slopes or hills. While a retaining wall serves a great purpose for controlling soil, it can create a raised garden bed for flowers or vegetables using your imagination. It can be made from numerous materials for an incredible appearance including wood, bricks, or masonry which is poured concrete blocks that can be stained, veneered, or carved to look like stone.

As a DIY project, creating a retaining wall can involve a good amount of labor and heavy lifting, it's advised you have at least one other person to help you out. This article will teach you how to build a retaining wall using concrete blocks.

What you Should Know Before Starting

Depending on the wall's height and your location, you might need a building permit so be sure and check with your local authorities for the building codes and contact your homeowners association (HOA) for any restrictions.

If you are going to do this yourself, your best option is to use blocks that are interlocking and heavy enough to stay in place without using adhesives. Interlocking blocks fit together and add a higher level of security to the wall. You can research online to find some great images of retaining walls or visit your local store for inspiration.

Keep in mind, the soil behind the wall will get wet, causing a lot of pressure applied to the wall so you will need good drainage. You will have to backfill the wall with good draining gravel or sand and install a drainage pipe. One note, soil holds water while sand drains very easily. You need a good mixture of soil behind the retaining wall. You need a good mixture of soil behind the retaining wall.

You can use a paver calculator or have your store do the calculations for you. The calculator will tell you the number of stones you need for your retaining wall project.

You should purchase 10% more materials than what you have estimated you need. This will give you room for errors and provide extra material for cutting blocks and for replacing blocks for future use. Plan ahead. Build your wall after a long period of time without rain when the soil is dry. Also, before digging, call 811 to stay safe and to locate underground utility lines to avoid.

Constructing a Retaining Wall

Your Location

To get the right width and length of the wall, use a tape measure. Mark the space with garden stakes and a mason's line. Tie the string to the stakes at the desired height of the wall and make sure the string is level.

If the wall is curved, use paint to mark the shape and the location of the wall. For the sake of safety, make sure you wear protective eyewear, boots, working clothes, and gloves when installing the wall.

Dig The Trench Then Level The Ground

For a successful retaining wall, you must have a level base. To dig a solid foundation, dig a trench for the first track of your interlocking blocks. Make sure the ground will stay even throughout the process.

Start digging the ground with a trench shovel. The trench should have a depth around half the height of the first track of blocks because they will be located on a base of gravel around 2 to 3 inches. Depending on the size of the blocks, the depth will be approximately 4 to 6 inches. For the record, the trench should be two times the width of one block.

Once you have finished digging the trench, compact it with a hand tamper or vibrating plate compactor. Place a standard level on a 2 x 4-inch area in the trench to ensure the bottom is smooth and level.

Note – The trench should account for any slopes. You might have to create steps up or down to ensure the top of the wall will be level. The wall should never be parallel to a slope.

Lay The Base

Due to soil erosion, the retaining wall should be built on a solid foundation made from gravel.

Choose gravel that has stones that are between 1/2 to 3/4 inches. Fill the trench with a 2 to 3-inch layer of gravel and rake it to guarantee the stones are evenly distributed. Tamp the base with your tamper to make sure it's compacted evenly.

Lay The First Track Of Blocks

Start laying the retaining blocks in the sturdy base you just created. Center the first track of blocks in the middle of the trench. Position your fist block and use a standard level to ensure it's even. If repositioning a block is needed, use some more gravel and a tool like a rubber mallet to get it in place.

Continue to lay the first track of blocks while checking that all the blocks are level. Lift lower blocks with more gravel and tap down higher blocks with the rubber mallet.

After you have finished the first track, fill the spaces between the wall and landscape with gravel. This should increase the wall's stability and durability against soil erosion.

If the retaining blocks have flanges, use a hammer and masonry chisel to knock off the flanges on the first track blocks to ensure they are all level.

Retaining Wall Construction

Cut The End Blocks

As the blocks should be staggered, you have to cut the end block of each even-numbered track in half. In other words, the second and fourth tracks should have half-end blocks while the first and third tracks should have full-end blocks.

Draw a line with a straight edge down the middle of the block. Some wall blocks have V-shaped notches on the backside. These notches will let you easily cleave the block in half using a hammer and chisel. Also, you can cut blocks in half using a circular saw with a masonry blade.

Always wear ear protection and eyewear and a dust respirator mask when performing this step.

Lay Additional Tracks

Once you have installed an even first track, you have created the successful groundwork for the other tracks. This is how you lay down the next levels of interlocking wall blocks:

Using a broom, brush off the first track of blocks to remove any debris. Start the second track of blocks with half of the end blocks you cut in the above step. Lay the rest of the second track blocks interlocking them if applicable and finish the track with the other half of your cut blocks from the previous step.

Check that the blocks are level as you go along and adjust if you have to. Typically, retaining wall blocks do not need adhesives to lay each track. If you want to lay more than 2 tracks just cut a block in half for the even-numbered tracks. The instructions should help your blocks stagger the right way. Again, brush off the blocks to remove any debris before starting the next track.

Fully Constructed Retaining Wall

Installing A Drain Pipe Is Optional

If you live in a region that's prone to heavy rain, you should install the drain pipe behind the wall. This step might be easier to do if you only have one or two tracks installed.

Use a perforated corrugated pipe that will extend behind the entire length of the wall and will drain the water where it can exit.

Cover the pipe with a drain sleeve to keep sediments from clogging the drain. To cover the pipe, pour the gravel behind of the wall. Once done, you can continue to laying tracks as you wish.

Backfill The Wall

Once you have completed the tracks of blocks, you can fill in the area behind the wall.

Backfill the wall with gravel or sand but if you use sand, cover the back with a landscape fabric to keep the sand from landing between the blocks. If you are backfilling with gravel, you can pour the gravel after each track you lay. Shovel the backfill material in small sections and pack it down to make sure there are no empty spaces.

Backfill up to just below the height of the wall. Fill the rest of the space with sod or topsoil for growing grass or plants. Make sure you fill with a good draining soil mix.