Everything You Need To Know About Corkjoint Systems: Uses, Benefits And Tips

Tradespeople in a construction site

Wondering what’s the use of a corkjoint system? Corkjoint systems are an instrumental and revolutionary component in the formation and connecting of concrete surfaces. The purpose of these components often varies from application to application, as per your needs and wants. If you’ve never needed to use and install one of these components, then do not fret because you have come to the right place. Read on to find out all the crucial information you’ll need before using these corkjoint systems.

Waterstop systems

Focusing firstly on the water stop, these elements are crucial to waterproofing concrete slabs and structures. If water is allowed to run through adjacent concrete pours, then water ingress can cause the concrete slabs to crack, degrade and warp over time. There are many different types of water stop corkjoint mechanisms, including PE, TPV, metal, extruded plastic and hydrophilic models. Metal models are recommended because of their durability and strength when bonding with the concrete.

Installing water stops is relatively straightforward. Embed approximately half of the device in the concrete and then tie the device to the surrounding metal using steel wire. This will ensure that the corkjoint doesn’t move while the concrete is being poured! Make sure you are removing any debris during the concrete pour.

Sealing systems

Another crucial concrete proofing mechanism is a sealing system. Most synthetic sealants are solvent-based rubber resin adhesives. For example, the CJ-100 adhesive has a high viscosity, minimal tack time, is easy to apply, is affordable and offers users premium bonding strength and durability. In terms of application, CJ-100 is perfect for bonding rubber, cork and other substances to concrete surfaces.

What do I need to be aware of?

It would be best if you remembered how flammable these substances can be – naturally, keep them away from a heat source or natural flames. In case of fire, extinguish the flame with a dry chemical or foam fire extinguisher. Make sure you use the substance within 12 months of production and store it in a cool, dry place when not being used.

Corkjoint seals and sealants

There are several corkjoint seals available in the market. J-Seal’s PU1-800 is one of the most popular options available, mainly because it is permanently elastic and consists of gun-grade polyurethane. In addition, it is a multipurpose sealant and has a high chemical resistance to oils, fuels and hydrocarbons. It is also resistant to ageing and weathering, so it’s a terrific sealant for the long-term.

J-Seal also offers an N49 Primer, which has been similarly successful. It is best used on porous surfaces, like natural stones, brick, concrete and limestone. It has strong water and sun resistance; however, it does require 2 hours to set following its application. If you are applying the primer in a confined space, then you need to make sure there is adequate ventilation. If this isn’t possible (like in a still air condition), then you must have a ventilation fan or a respirator close by.

Expansion fillerboards

The final corkjoint system commonly used for concrete bonding is expansion fillerboards. Their purpose is to hold different parts together while absorbing temperature-induced expansion (from heat and sunlight) and contraction (from lower temperatures). Naturally, these fillerboards are crucial for concrete slabs and pipeline expansions, which change in shape as per seasonal variation.

At the end of the day, you want the best concrete bonding systems to ensure that you have the concrete is poured and appropriately installed. The last thing you want is for the concrete, pipeline or bricks to become warped or cracked because of water ingress or expansions/contractions in the stone (from seasonal changes).