The problem on site
In modern industrial facilities, logistics hubs, and distribution centres, concrete floors take constant mechanical abuse. One of the most frequent defects reported by site engineers and facility managers is the spalling and chipping of joint edges. Forklifts, reach trucks, and pallet trolleys roll over construction and contraction joints hundreds of times every shift. Over time, the crisp concrete corners begin to crack, crumble, and break away.
This deterioration creates jagged, widened gaps along the floor joints. When left unattended, the damage accelerates rapidly. As the gap widens, the impact on passing wheels increases, leading to deeper concrete failure along the joint run. Forklift drivers begin to slow down to navigate rough crossings, causing delays in material movement. The severe vibration also causes premature wear on forklift wheel bearings, axles, and steering assemblies. In severe cases, high-mast forklifts experience dangerous load instability when crossing degraded joints.
Site teams frequently try to resolve this issue by applying standard elastomeric joint sealants or standard cementitious patching mortars. However, these quick fixes routinely fail under continuous traffic. Flexible sealants dish down under heavy loads, and brittle patch materials break away under point pressure, leaving the underlying concrete edge exposed to further destruction.
Why it happens
To prevent edge breakdown, it is necessary to understand the mechanical forces occurring at the joint interface. The concrete edge forming the joint opening is known in engineering terminology as the joint arris. Under untrafficked conditions, this edge remains intact. However, industrial warehouse traffic introduces specific loading conditions that regular concrete arrises cannot resist on their own.
Industrial handling equipment, particularly electric forklifts, order pickers, and pallet jacks, is equipped with small, hard wheels made of solid polyurethane, nylon, or composite compounds. Unlike pneumatic vehicle tyres that deform and distribute weight over a broad footprint, these small, hard wheels concentrate tremendous weight onto a tiny contact surface area.
When a hard wheel rolls over a joint gap, it transfers its entire wheel load onto the unsupported concrete arris at the edge of the slab. Concrete has high compressive resistance over a wide surface, but its tensile strength at an unreinforced sharp corner is relatively low.
If the joint is filled with a soft, elastic sealant, such as a low-modulus polyurethane or polysulphide formulation, the sealant compresses downward instantly under the tyre. Because the soft sealant offers no vertical structural resistance, the wheel drops slightly into the joint gap and strikes the opposing concrete arris like a hammer. This repetitive impact load causes micro-fracturing along the edge, followed by spalling, crumbling, and complete edge breakdown.
How Space Arc Engineering approaches it
Protecting concrete joints requires an engineering assessment rather than a generic sealing approach. Space Arc Engineering approaches floor joint durability by analysing the operational demands of the warehouse before material selection takes place.
As an authorised project distributor and technical solution provider, Space Arc Engineering evaluates several critical site factors:
- Wheel hardness and loading: We determine the type of traffic using the floor, differentiating between pneumatic rubber tyres, solid rubber, and hard polyurethane or nylon wheels.
- Joint classification: We distinguish between contraction joints designed to accommodate initial shrinkage and construction joints subject to continuous dynamic load transfer.
- Anticipated movement: We assess the balance between the need for edge support and the residual movement expected in the concrete slab.
- Joint geometry: We review the width and depth of the existing joint cuts to ensure adequate aspect ratio for semi-rigid filling.
Once these parameters are defined, Space Arc Engineering matches the correct floor joint filler for warehouse traffic to your project. Rather than treating joints with flexible sealants intended for building facades, we supply semi-rigid materials specifically designed to bridge the gap under heavy point loads. Furthermore, Space Arc Engineering provides contractors and site teams with clear application sequences, including proper joint cutting, edge preparation, dust removal, and pouring procedures to ensure correct installation.
The system we supply
To eliminate joint arris spalling in heavily trafficked slabs, Space Arc Engineering supplies STP ShaliSeal EMS, manufactured by STP Limited.
STP ShaliSeal EMS is a two-component, semi-rigid epoxy joint filler formulated specifically for industrial concrete floor joints subject to heavy, hard-wheeled traffic. As an established distributor for STP Limited, Space Arc Engineering supplies this system directly to industrial projects and warehouse developments across India.
The system provides critical operational benefits:
- Supports the joint edge: STP ShaliSeal EMS cures to a semi-rigid consistency. When placed in the joint, it provides continuous, direct support beneath the concrete arris, preventing the concrete edge from deflecting or shearing off under point loading.
- Made for hard-wheel traffic: Unlike elastomeric sealants that deflect immediately, this semi-rigid epoxy filler possesses the compressive stiffness required to carry heavy wheel loads from polyurethane and nylon forklift wheels without depressing.
- Protects the arris from spalling: By filling the joint flush with the floor surface, the material creates a smooth transition across the joint gap. Forklift wheels roll seamlessly from one slab panel to the next without impacting or hammering the concrete corners.
- Bond and durability: Manufactured by STP Limited, the epoxy resin provides tenacious adhesion to dry, properly prepared concrete sidewalls, preventing debonding under cyclical floor washing and warehouse traffic.
What to check before you order
Before placing an order for a semi-rigid joint filler, project teams must verify several site conditions to ensure proper performance:
- Concrete curing age: Semi-rigid epoxy fillers should not be applied to green concrete that is still experiencing significant drying shrinkage. Ensure that the slab has completed its primary shrinkage cycle before filling contraction joints.
- Absence of backer rods: For heavy-duty edge support, semi-rigid joint fillers must be installed to the full depth of the saw cut (or as specified by project engineering drawings) without soft compressible foam backer rods beneath the high-traffic zone, as soft backing allows the filler to deflect.
- Joint cleanliness: The joint sidewalls must be completely dry, free of standing water, laitance, curing compounds, and loose dust. Proper joint cleaning using dry saw cutting and industrial vacuuming is required prior to pouring.
- Existing edge damage: If the arris is already broken or spalled, the edges must be rebuilt with an appropriate epoxy mortar before the joint is filled. Joint fillers are designed to protect sound edges, not reconstruct missing concrete corners.
- Movement expectations: Semi-rigid epoxy fillers are intended for joints with low movement. If your project involves wide expansion or isolation joints with high thermal movement, alternative jointing strategies must be evaluated.
Talk to our technical team
Space Arc Engineering works with warehouse developers, flooring contractors, and civil engineers to deliver durable, traffic-resistant floor systems across India. If you are experiencing joint spalling or planning a new warehouse floor installation, our team is ready to assist with material selection, technical datasheets, and delivery schedules.
To discuss your project requirements or request material supply, contact Space Arc Engineering directly:
Phone: +91 99991 55255 / +91 72900 89007
Website: www.space-arc.in
You can also review our complete product portfolio and technical supply capabilities by visiting our solutions.