Best ratings
1 . REINZOPLAST Non-Hardening Sealant / 80 ml
„Last used to seal VP 2002 heat exchanger, metal-rubber-metal and is 100% effective.“
2 . TIKAL TIKALFLEX PCW 14 Adhesive / Sealant
„Good product“
3 . SIKA Sikaflex 522 - Adhesive Sealant
„Excellent product, just the job for what I needed it for“
Sealants for Boats
Sealants have several uses on board a boat. Our marine sealants from Sikaflex, Yachticon and Tikal are suitable for sealing through-hulls, cable inlets, bathrooms or windows. The main purpose of boat sealant is one thing: to protect the interior of the boat from water penetration. Our sealants are also ideal for embedding cleats and fittings, filling cracks that can cause leaks, and making sealant joints that are resistant to vibration.
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Seawater resistant
Overpaintable
UV-resistant
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Order by
Ratings
Brand
Price range
€
Availability
For substrate
Examples of use
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Contents
ml
No. of components
Package
Colour
Seawater resistant
Overpaintable
UV-resistant
Made in Germany
SIKA
Sikaflex - 291i Marine Sealant / Filler
from
€8.95
(€127.86 / L)
6 variants
SIKA
Sealant 591 Marine Sealant
from
€9.95
(€142.14 / L)
5 variants
Made in Germany
SIKA
Sikaflex 522 - Adhesive Sealant
from
€14.95
(€49.83 / L)
3 variants
Made in Germany
TIKAL
TIKALFLEX Contact 12 Adhesive / Sealant
from
€6.95
(€99.29 / L)
5 variants
Made in Germany
-9%
TIKAL
TIKALFLEX PCW 14 Adhesive / Sealant
€14.28
only
€12.95
(€43.16 / L)
30
Made in Germany
TIKAL
TIKALFLEX Clear 10 Adhesive / Sealant
only
€12.50
(€43.10 / L)
41
REINZOPLAST Non-Hardening Sealant / 80 ml
only
€17.95
(€224.37 / L)
12
NEO-FERMIT Sealing Paste
only
€4.95
(€33.00 / kg)
31
-14%
POLYMARINE
SEALFLEX PVC Sealant
€58.10
only
€49.95
(€99.90 / L)
Expected to be in stock within 1-2 weeks
-32%
YACHTICON
Captain-Tolleys Sealant / 60 ml
€21.96
only
€14.95
(€249.16 / L)
> 100
Made in Europe
-13%
LOCTITE 577 - Thread Sealant / for Metal Threads
€45.68
only
€39.95
(€799.00 / L)
31
Made in Italy
LOCTITE SI5331 Thread Sealant / for plastic and metal threads
only
€41.95
(€419.50 / L)
11
-12%
YACHTICON
Brush Seam Grip
€16.95
only
€14.95
(€149.50 / L)
Made in Germany
-17%
YACHTCARE
LEAK HERO Sealant / 625 ml
€44.30
only
€36.95
(€59.12 / L)
75
-6%
SIKA
12x Sikaflex - 291i Marine Sealant / Filler
€167.36
from
€157.95
(€13.16 / pcs.)
3 variants
Sealants for every underground material
- What are the properties of a good boat sealant? -
Boat sealants must be weather and UV resistant and should, ideally, be overpaintable. When used indoors, sealants should contain as little solvent as possible, so that the user is exposed fewer harmful emissions. Sealant is used in boat building on a wide variety of materials. In the best case, a good sealant should be suitable for many applications and reliably seal rubber, wood, glass, plastic and metals, as well as concrete, ceramics, polystyrene, filler and existing primers and paints.
Customer ratings & reviews
All reviews (207.836)
Kazım A. on 21.07.2026
Im satisfied form very quick delivery..
David A. on 21.07.2026
Stanley in customer service did a great job
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