It is used on porous substrates such as concrete, brick work and timber. (TDS p.1)
- Temperature stated in TDS
- +5 °C min. / +40 °C max (TDS p.1)
Step-by-step solution
Floor joints in car parks, warehouses and roads
Saw-cut, expansion and connection joints in floors that carry people, cars, forklifts or trucks. The sealant must take both traffic and movement, and the joint must be sized for it.
- 6 steps
- 6 products
- 4 answers
You need this when…
- Joint sealant torn out or missing in a car park
- Forklift wheels breaking the joint edges
- Water and dirt getting into slab joints
- Weeds and cracks along road or pavement joints
The work, step by step
General guidance based on the manufacturer data sheets. Site conditions differ: confirm the system with MCT before you start. Where we do not name a product, ask us and we will confirm the right one.
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Step 1: Clean out and repair the edges
Remove old sealant, laitance and loose particles. Repair damaged joint edges with Sika repair products. After saw-cutting, flush away all slurry and let the joint dry (Sikaflex PRO-3 p.4).
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Step 2: Size the joint
Sikaflex PRO-3: 10–40 mm wide at a 1:0.8 width-to-depth ratio. For example, at 6 m spacing, the minimum is 10 × 10 mm inside and 20 × 17 mm outside (Sikaflex PRO-3 p.2, p.3). Sika Polysulphide PG: 6–50 mm wide, a 2:1 ratio for moving joints, and at least 20 mm deep for trafficked joints (Sika Polysulphide PG p.2).
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Step 3: Backer rod and primer
Insert a closed-cell polyethylene backer rod (Sikaflex PRO-3 p.3). For polysulphide, lay bond-breaker tape over the backer and prime the two joint sides. Wait 30 minutes to 3 hours before sealing (Sika Polysulphide PG p.3). In wet conditions, use Sika Primer PS (Sika Polysulphide PG p.2).
Sika Primer PS Sika -
Step 4: Car parks, warehouses and factory floors
Sikaflex PRO-3 is for floors, pedestrian and traffic areas, car-park decks and warehouse and production floors, with ±35 % movement (Sikaflex PRO-3 p.1). Sikaflex Floor is for connection joints, crack-control joints in industrial floors and joints between precast elements, 10–30 mm wide at 1:0.8 (Sikaflex Floor p.1, p.2).
Sikaflex PRO-3 Sika Horizontal and vertical interior and exterior sealing joint applications: Food industry, Cleanrooms, Sewage treatment plants, Tunnels Sealing horizontal and vertical joints for:, Floors, Pedestrian and traffic areas. (TDS p.1)
- Temperature stated in TDS
- −40 °C to +70 °C (TDS p.2)
- Pack
- 600 ml cylindrical foil pack
Sikaflex Floor Sika Request a quotation Sikaflex® Floor is designed for connection joints in floors, joints for crack control in industrial floors and floor joints between pre-cast concrete elements. (TDS p.1)
- Temperature stated in TDS
- 40 °C to +70 °C (TDS p.2)
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Step 5: Roads, runways, bridge decks and pavements
Sika Polysulphide PG is a pourable sealant for horizontal joints only: floors, PQC, bridge decks, runways, car parks, roads and culverts (Sika Polysulphide PG p.1, p.2). Pot life is about 2 hours at 25 °C, and curing takes 1 week (Sika Polysulphide PG p.2). Sikasil-728 SL is self-levelling, for pavements, bridges, parking and driveways, on slopes up to 3 %, in joints 6–25 mm wide (Sikasil-728 SL p.1, p.2). Use a backer rod 25 % larger than the joint (Sikasil-728 SL p.3).
Sika Polysulphide PG Sika It is used in horizontal joints in many types of buildings and civil engineering constructions such as: Expansion joints in floors, PQC joints, Precast concrete elements, Bridge deck joints, Reservoirs, Vacuum dewatered floor joints/groove sealing, crack repairing, Horizontal trafficable joints, … (TDS p.1)
- Temperature stated in TDS
- -20 °C min. / +80 °C max (TDS p.2)
Sikasil-728 SL Sika Request a quotation Sikasil®-728 SL is designed to seal horizontal saw cut and expansion joints in concrete pavements on highways, airports, bridges, walkways, parking garages and driveways. (TDS p.1)
- Temperature stated in TDS
- +5 °C min. / +40 °C max (TDS p.2)
- Pack
- 858 ml (29 fl. oz.) cartridge, 12 cartridges per box
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Step 6: Fuel stations and containment bunds
Sikaflex Tank N is for floor joints in petrol stations, handling areas and bunds. It is for professional applicators only (Sikaflex Tank N p.1).
Sikaflex Tank N Sika Professionals only Sikaflex® Tank N shall be used by professional applicators only. (TDS p.1)
- Temperature stated in TDS
- −40 °C to +70 °C (TDS p.2)
Proposal brief
Floor joints in car parks, warehouses and roads: scope and system
A starting point for a site proposal. Quantities, prices and the final specification follow a site visit or photos.
Scope of work
- Cleaning out x running metres of floor joints
- Edge repair where damaged
- Backer rod, priming and sealing with a traffic-grade sealant
- Traffic management while the sealant cures
System build-up
| Step | Product | Pack | Source |
|---|---|---|---|
| 3. Backer rod and primer | Sika Primer PS | — | TDS p.1 · March 2026, Version 01.01 |
| 4. Car parks, warehouses and factory floors | Sikaflex PRO-3 | 600 ml cylindrical foil pack | TDS p.1 · May 2021, Version 03.01 |
| 4. Car parks, warehouses and factory floors | Sikaflex Floor | — | TDS p.1 · May 2021, Version 01.01 |
| 5. Roads, runways, bridge decks and pavements | Sika Polysulphide PG | — | TDS p.1 · May 2025, Version 03.01 |
| 5. Roads, runways, bridge decks and pavements | Sikasil-728 SL | 858 ml (29 fl. oz.) cartridge, 12 cartridges per box | TDS p.1 · December 2022, Version 01.01 |
| 6. Fuel stations and containment bunds | Sikaflex Tank N (professionals) | — | TDS p.1 · September 2023, Version 01.02 |
What we need from you
- Joint length (running metres), width and depth
- Traffic type: cars, forklifts, trucks, aircraft
- Indoor or outdoor; any fuel, oil or chemical spills?
- Photos of typical joints
- Allowed closure time for each area
Site conditions
- Dry joints with sound edges (Sika Polysulphide PG p.2)
- Area closed to traffic while curing. Polysulphide curing time is 1 week (Sika Polysulphide PG p.2)
Not included
- Major joint-edge reconstruction (nosings) is quoted separately
- Slab replacement or levelling
- Fuel-station certification paperwork
Questions customers ask
Which sealant for a basement car park?
Sikaflex PRO-3 is listed for car-park decks and traffic areas, with ±35 % movement (Sikaflex PRO-3 p.1).
How deep should the sealant be?
For Sikaflex PRO-3, the depth is 0.8 times the width, for example 20 mm wide by 17 mm deep outside at 6 m spacing (Sikaflex PRO-3 p.2, p.3). For polysulphide in trafficked joints, at least 20 mm deep (Sika Polysulphide PG p.2).
When can traffic go back on?
Polysulphide PG has a curing time of 1 week (Sika Polysulphide PG p.2). For PU sealants, ask us: it depends on site conditions and joint depth.
Can it be used on a sloped ramp?
Sikasil-728 SL is self-levelling and limited to slopes of 3 % (Sikasil-728 SL p.1, p.3). On steeper ramps, use a non-sag gun-grade sealant such as Sikaflex PRO-3 (Sikaflex PRO-3 p.1).
Steps and product facts are taken from the manufacturer data sheets (page cited). Products are named only where the data sheet confirms the use; quantities follow a site visit or photos. General guidance: check the data sheet or ask us before you start.