Sika makes the materials that go between a ship’s steel and what the passengers walk on — and the sealants that close every joint around it. This page puts the Sika marine range we supply in the order it is used: a tie coat and primer on the deck, a Sikafloor Marine self-levelling screed, the finish on top, then the teak deck and the Sikaflex sealants and adhesives.
Read it as two systems. The deck build-up is chosen by layer; the sealants are chosen by joint.
A levelled accommodation deck is specified as a stack. Each layer is there because the one above it will not bond or level without it.
Only on aluminium or on steel with a zinc-rich shop primer. A two-component polyurethane with active anti-corrosion pigments, about 0.195 kg/m² at 80 µm dry film; overcoatable after 3 hours at +20 °C and cures even in a cold hull.
Water-based SBR primer, about 75 ml/m² on steel. It goes on white and turns transparent when dry — the sign that the deck is ready for the mortar.
One-component, self-levelling, 3–50 mm. Marine-109 cures to 0.9 kg/l and is walkable in about 3 hours; Marine-119 is the denser, pumpable mortar at 27.5 MPa.
Ceramic or stone tiles, parquet, PVC, rubber, textile or a resin coating. For an IMO-certified vinyl or carpet finish we quote the floor and the screed together.
In build-up order: tie coat, primer, the two marine screeds, then the epoxy primer and coating for a resin finish. Specs are pulled live from our catalogue — the same data that goes into a quotation. Scroll the table sideways to see every product.
Total thickness
Base
Density
Shore hardness
Mixing ratio
Solids content
Compressive strength
Flexural strength
Pack size
Water demand
Tensile strength
Application temperature
Pot life
Fire class
Installation
Colours & designs
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2-component polyurethane primer with active anti-corrosive pigments
1500 kg/m³
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A:B = 92:8 by weight / 8:1 by volume
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—
—
12.5 kg
—
—
5+ °C
120 min
—
Airless spray (min. 180 bar, nozzle 0.38–0.53 mm), brush or roller
—
—
Water-based SBR emulsion
—
—
—
50 %
—
—
10 kg
—
—
5-40 °C
—
—
Long-hair roller; porous substrates in two coats (first diluted 20 % with water)
—
3-50 mm
Polymer-modified cement mortar (lightweight, self-levelling)
900 kg/m³
—
6 l water per 15 kg bag
—
20 MPa
6 MPa
15 kg
6 l / bag
1.3 MPa
10-30 °C
45 min
IMO FTP Code
Prime with Sikafloor Marine Primer C (ZP Primer tie coat on Al/zinc shop primer); pour and spread with steel board or straight edge
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3-50 mm
Polymer-modified cement mortar (self-levelling)
1800 kg/m³
—
4.5 l water per 25 kg bag
—
27.5 MPa
8.2 MPa
25 kg
4.5 l / bag
—
5-30 °C
40 min
IMO FTP Code
Prime (ZP Primer tie coat on Al/zinc shop primer); spread with surface blade or pin rake, de-aerate with spike roller; pumpable
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—
Solvent-free epoxy (filled, low viscosity)
1470 kg/m³
Shore Shore D ~80
A:B = 85:15 by weight
100 %
—
—
30 kg
—
—
10-30 °C
25 min
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Fleece roller or squeegee with back-rolling; mixed with quartz sand for mortars
2
—
Solvent-free epoxy
1480 kg/m³
Shore Shore D 80
A:B = 80:20 by weight
100 %
140 MPa
45 MPa
30 kg
—
—
10-30 °C
25 min
Bfl-s1
Roller coat, notched-trowel self-smoothing layer with spike roller, or broadcast system with seal coat
4
The primer and the tie coat are the same either way. The screed is the decision — weight against strength.
A laid teak deck uses three Sika products, always in this order. See our yacht teak guide for the timber itself.
The marine sealants overlap less than their names suggest. Pick by what the joint has to do.
The multipurpose one: elastic, vibration-resistant joints and interior sealing, 700 % elongation, paintable, solvent-free.
For joints that carry load: 3 MPa tensile, 2 MPa lap shear, gap-filling. Aluminium (anodised too), GRP, ABS and coated metals.
Direct glazing of polycarbonate and acrylic (PC, PMMA) in boats and ships, plus exposed exterior seals.
Silane-terminated polymer: colour-stable, mould-resistant, isocyanate-free and suitable below the waterline.
Neutral-cure silicone that keeps sealing next to a heat source, −40 to +150 °C. Not paintable, not for PC or PMMA.
Made for caulking open-deck timber: weathers, resists seawater and sands quickly once cured.
Rule of thumb: seal with 291i, bond with 292i, glaze with 295 UV, go below the waterline with 591. The Module B row is the certificate number a yard enters in the equipment list.
Base
Density
Shore hardness
Tensile strength
Elongation at break
Skin time
Service temperature
MED certificate (Module B)
Application temperature
Fire class
Colours & designs
1-component polyurethane
1300 kg/m³
Shore A 40
1.8 MPa
700 %
60 min
-50…90 °C (short term 120 °C for 4 h, 140 °C for 1 h)
MEDB00006XN
10-40 °C
IMO low spread of flame
2
1-component polyurethane
1300 kg/m³
Shore A 40
3 MPa
400 %
40 min
-50…90 °C (short term 120 °C for 4 h, 140 °C for 1 h)
MEDB00006XS
10-40 °C
IMO low spread of flame
—
1-component polyurethane
1300 kg/m³
Shore A 35
2 MPa
500 %
60 min
-50…90 °C
MEDB000069D
10-35 °C
—
2
1-component silane terminated polymer (STP)
1500 kg/m³
Shore A 45
2.2 MPa
500 %
35 min
-50…80 °C
MEDB000019T
5-40 °C
IMO FTP Code Part 5 (tested)
3
1-component neutral-cure silicone
1450 kg/m³
Shore A 25
1.2 MPa
650 %
15 min
-40…150 °C
MEDB000030C
5-40 °C
IMO FTP Code Part 5 low flame spread
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1-component polyurethane
1300 kg/m³
Shore A 40
3 MPa
600 %
90 min
-50…90 °C
MEDB000071N
5-35 °C
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—
1-component polyurethane
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—
—
—
—
—
MEDB00004TW
—
—
—
Most sealant failures are adhesion failures. Aktivator-205 for non-porous faces — metals, plastics, paint; MultiPrimer Marine for metals and marine timber; SikaPrimer-290 DC for teak deck strips. Same across the range: Application temperature 5-40 °C.
Base
Flash-off time
Solvent-based adhesion promoter
min. 10 minutes, max. 2 hours (23 °C / 50 % r.h.)
Solvent-based epoxy solution primer
min. 30 minutes, max. 24 hours (23 °C / 50 % r.h.)
Solvent-based polyurethane solution primer
60 minutes (≥15 °C), 120 minutes (<15 °C), max. 24 hours
Where the Sika products sit relative to the other marine build-ups we supply.
The full category — screeds, polymer coatings, insulating systems, primers and sealants.
Every sealant and adhesive in the catalogue, filterable.
The GTF Freese screed range — the alternative when a lighter or heavier screed class is needed.
When the deck is a fire division, the build-up starts with insulation, not a screed.
FTP Code, Wheelmark and the conformity modules in plain English.
What shipyards, outfitters and yacht builders ask before ordering.
Both are one-component, self-levelling deck screeds based on polymer-modified cement, laid 3–50 mm thick on interior decks. Marine-109 is the lightweight one: it cures to 0.9 kg/l, so it is chosen where every kilogram on the deck counts, but it is not for galleys or sculleries. Marine-119 cures to about 1.8 kg/l and is the stronger, denser mortar — 27.5 MPa compressive strength, pumpable, EMICODE EC1PLUS — and doubles as a repair mortar for holes and depressions.
Only on aluminium decks or steel decks with a zinc-rich shop primer. There SikaCor ZP Primer goes on first as a tie coat, then Sikafloor Marine Primer C, then the screed. On an ordinary shop-primed steel deck Primer C alone is enough — about 75 ml/m², and it turns from white to transparent when the deck is ready for the mortar.
Sikaflex-291i is the multipurpose sealant: elastic, vibration-resistant joints and interior sealing, 700 % elongation at break. Sikaflex-292i is the structural adhesive: it holds joints under high dynamic stress, with 3 MPa tensile strength and 2 MPa lap shear, and is the one for bonding aluminium, GRP and coated metals. Seal a joint with 291i; bond a part with 292i.
Three, in order. SikaPrimer-290 DC primes the timber strips. Sikaflex-298 FC beds the planks onto the sub deck — spread with a 4 mm notched trowel at about 1.2 l/m², and it also deadens sound. Sikaflex-290 DC PRO caulks the seams: it is made for exposed open-deck joints, resists seawater and sands easily once cured.
Seven of them carry MED (Wheelmark) certificates from DNV under Directive 2014/90/EU: Sikaflex-290 DC PRO, -291i, -292i, -295 UV, -298 FC, -591 and SikaFiresil Marine N. Each has its own Module B certificate, listed in the comparison table above; Module D is MEDD000016J for all of them. The certificates are on each product page.
Sikaflex cures with moisture from the air, so it skins first and then cures inwards. Skin times at 23 °C and 50 % relative humidity run from 35 minutes on Sikaflex-591 and 40 minutes on -292i to 60 minutes on -291i and -295 UV and 90 minutes on -290 DC PRO. Full cure takes longer and slows down in cold, dry air and in deep joints, so plan sanding and loading on the datasheet figure for the actual joint size.
Send the product list with quantities, or the deck area and build-up if you want us to calculate it. Sika ships in full boxes, so quantities are rounded up to the box — the quotation shows it per article. We return a quotation with lead time, datasheets and the MED certificates, and deliver across the EU.
Tell us the deck — steel or aluminium, the area in m², the layer thickness you need and what goes on top. We come back with the full build-up: tie coat if needed, primer, screed quantities by the bag, the sealants by the box, lead time and the certificates.
For a teak deck, the deck area and the seam length are enough to start.
