Readers ask: Concrete Expansion Joints Sealant?

Do concrete expansion joints need to be sealed?

Expansion joints must be sealed with a flexible sealant, like QUIKRETE® Self-Leveling Polyurethane Sealant or QUIKRETE® Non-Sag Polyurethane Sealant…or an expansion joint strip, to prevent water from penetrating the joint and deteriorating the sub-base.

What do you fill concrete expansion joints with?

Foam backer rods act to fill in space between concrete joints so you don’t need to use a ton of self-leveling sealant. Here’s a BIG TIP: the diameter of the backer rod should be 1/8 inch larger than the width of your concrete expansion joint. This will ensure a water tight seal.

What is the best concrete joint filler?

Akonaflex™ Expansion Joint Filler is a superior-grade, one-component, urethane sealant and filler to be used in concrete joints as well as a wide variety of substrates.

Can you fill concrete expansion joints?

Just remember that expansion joints should always be sealed and filled with a flexible joint sealer and never be epoxied or coated over. Contraction joints can be filled in the same manner after a coating or sealer is applied.

How do you fill large gaps between concrete slabs?

Dig a 4-inch wide trench along the sides of the slabs from the crack or gap closest to the house all the way down to the street or sidewalk. This trench should be a deep as the slabs are thick. Fill the trenches on either side of the driveway with small, rounded pea gravel (the size of marbles or peas).

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How do I fill the gap between my garage and driveway?

The best way to repair your expansion gap is to use purpose-designed foam backer rods and self-leveling caulk. Both materials are available in most home improvement stores. Cut your foam backer rods to the proper length for your expansion gap and press them into the gap.

How do I fill the gap between my house and concrete patio?

Fill the Gap Between a Concrete Patio and House

  1. Asphalt saturated fiberboard, designed for expansion joints.
  2. Closed cell backer rod, a spline roller, and a pair of scissors.
  3. Concrete crack sealant and caulk gun for application.
  4. Not perfect, but it will do.
  5. All dry and with some windswept debris for character!

When should you use expansion joints in concrete?

Expansion joints are put in place before the concrete is poured. Expansion joints are used to allow the slab to move and not put stress on whatever it abuts. These joint are placed where a slab meets a building, where a slab meets another slab, and where a pool deck meets the coping.

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