Popular: Sikaflex · waterproofing · grout · data sheets
Pipes, ducts and cables passing through basement walls, tank walls, roofs and fire-rated floors are weak points for water and fire. Seal each one for its job: watertight, weathertight, fire-rated, or a simple interior gap.
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.
Sort the penetrations: below ground or in a tank wall (water), through the roof (weather), through a fire-rated wall or floor (fire), or an interior gap (finish only). Each needs a different product below.
Before casting, fix SikaSwell S-2 or a SikaSwell P Profile or PS-2010 strip around the pipe (SikaSwell S-2 p.1; SikaSwell P Profiles p.1; SikaSwell PS-2010 p.1). Keep at least 8 cm of concrete cover (SikaSwell S-2 p.2; SikaSwell P Profiles p.4; SikaSwell PS-2010 p.2). These are for water pressure up to 2 bar (SikaSwell P Profiles p.3; SikaSwell PS-2010 p.2). Tie-wire or sleeve profiles around small pipes, and keep them out of rain for no more than 24 hours before casting (SikaSwell P Profiles p.3).
Joint sealing: Construction joints, Pipe and steel work penetrations through walls and floor slabs, Around all types of penetrations and construction joints, Construction joints in cable ducts, etc. Fixing / Adhering swellable profiles:, SikaSwell® A Profiles, SikaSwell® P Profiles. (TDS p.1)
To seal: Construction joints, Pipe and steel work penetrations through walls and floor slabs, Construction joints in precast concrete, Construction joints in tunnel segments, Construction joints in cable ducts, etc, Around all types of penetrations through concrete. (TDS p.1)
To seal: Construction joints, Pipe and steel work penetrations through concrete walls and floor slabs, Construction joints in precast concrete, Construction joints in cable ducts, etc, Around all types of penetrations through concrete. (TDS p.1)
Stop running water first with Sika-4a mixed with fresh ordinary Portland cement, as preliminary work on wet surfaces (Sika-4a p.1, p.2). Then seal with Sikadur-Combiflex SG-20 P, a bonded tape listed for pipe penetrations (Sikadur-Combiflex SG-20 P p.1), bonded with Sikadur-31 DW (Sikadur-Combiflex SG-20 P p.3). Sikadur-31 DW is for experienced professionals only (Sikadur-31 DW p.1).
Sikadur-Combiflex® SG-20 P is used for sealing: Movement joints, Construction joints, Pipe penetrations, Cracks, Building components where differential settlement is expected Sikadur-Combiflex® SG-20 P is used for the following areas:, Tunnels. (TDS p.1)
Structural adhesive for bonding: Concrete elements, Hard natural stone, Ceramics, fibre cement, Mortar, Bricks, Masonry, Steel, Iron, Aluminium, Wood. (TDS p.1)
The right product here depends on your site. We confirm it before naming it.
Sika MultiSeal BT is a self-adhesive butyl tape with an aluminium facing, for roofs, chimneys, roof lights and ductwork (Sika MultiSeal BT p.1). The surface must be sound, clean and dry. Do not use it on natural stone (Sika MultiSeal BT p.2).
The right product here depends on your site. We confirm it before naming it.
SikaSeal-628 Fire Wrap seals plastic and composite pipes from 32 to 250 mm, for up to 4 hours, indoors and outdoors (SikaSeal-628 Fire Wrap p.1, p.2). SikaSeal-623 Fire is an intumescent sealant for interior penetrations with combustible pipes and cables (SikaSeal-623 Fire p.1). Sikaflex-400 Fire also covers fire-rated penetrations (Sikaflex-400 Fire p.1). Meet the limits in the fire classification reports (SikaSeal-628 Fire Wrap p.2; SikaSeal-623 Fire p.2).
Restores the fire resistance performance of a floor or wall which incorporates service openings containing plastic or composite pipes Internal-fit application (installed in the wall/floor) in combination with Sikacryl®-621 Fire Can be combined with SikaSeal… (TDS p.1)
Restores the fire resistance performance of a floor or wall which incorporates combustible services such as soil and vent pipes or cables. (TDS p.1)
Sikaflex®-400 Fire is designed for fire rated movement and connection joints and penetrations on porous and non-porous substrates. (TDS p.1)
Sikacryl-110 fills interior gaps around penetrations, takes ±7.5 % movement, and can be over-painted (Sikacryl-110 p.1). Sikacryl S also covers gaps around wall and ceiling penetrations (Sikacryl S p.1).
Sikacryl®-110 is designed for interior crack and joint filling with low movement. Sikacryl®-110 is also suitable for duct sealing in HVAC applications. Main applications: Head of wall joints, Wall joints, Interior joints around windows and doors, Around the penetrations, As a gap filling in the c… (TDS p.1)
Sealing joints for: Interior joints on many types of substrate with a limited amount of movement, Connections around window and door frames, Around wall and ceiling penetrations Crack filling:, Internal and external cracks not exposed to permanent water immersion. (TDS p.1)
A starting point for a site proposal. Quantities, prices and the final specification follow a site visit or photos.
| Step | Product | Pack | Source |
|---|---|---|---|
| 2. New concrete: swellable seal around the pipe | SikaSwell S-2 | 600 ml unipacs | TDS p.1 · May 2021, Version 02.01 |
| 2. New concrete: swellable seal around the pipe | SikaSwell P Profiles | — | TDS p.1 · May 2021, Version 01.01 |
| 2. New concrete: swellable seal around the pipe | SikaSwell PS-2010 | 10 m x 10 rolls per box | TDS p.1 · May 2025, Version 01.02 |
| 3. Existing leaking pipe entries | Sikadur-Combiflex SG-20 P | — | TDS p.1 · May 2025, Version 04.01 |
| 3. Existing leaking pipe entries | Sikadur-31 DW (professionals) | — | TDS p.1 · May 2021, Version 03.01 |
| 5. Fire-rated walls and floors | SikaSeal-628 Fire Wrap | — | TDS p.1 · May 2021, Version 02.01 |
| 5. Fire-rated walls and floors | SikaSeal-623 Fire | 300 ml cartridge | TDS p.1 · May 2021, Version 02.01 |
| 5. Fire-rated walls and floors | Sikaflex-400 Fire | — | TDS p.1 · April 2021, Version 02.01 |
| 6. Interior gaps around pipes (no water or fire duty) | Sikacryl-110 | — | TDS p.1 · May 2025, Version 04.01 |
| 6. Interior gaps around pipes (no water or fire duty) | Sikacryl S | 300 ml cartridge: 12 cartridges per box. | TDS p.1 · May 2021, Version 01.01 |
Stop the running water first with Sika-4a mixed with cement (Sika-4a p.1). Then seal the entry with the bonded Sikadur-Combiflex SG-20 P tape system (Sikadur-Combiflex SG-20 P p.1, p.3). This is professional work (Sikadur-31 DW p.1).
SikaSwell is placed before concreting and needs at least 8 cm of concrete cover (SikaSwell S-2 p.2). For existing entries, ask us: it depends on site conditions.
SikaSeal-628 Fire Wrap is made for pipe diameters from 32 to 250 mm. All sizes are 40 mm wide (SikaSeal-628 Fire Wrap p.2).
Sikacryl-110 is for interior use (Sikacryl-110 p.1). On the roof, use a weather-resistant tape such as Sika MultiSeal BT (Sika MultiSeal BT 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.