International Watertite filler

  • Epoxy boat putty
  • Extremely water resistant
  • Fast drying and 1:1 ratio

International Watertite is a fast drying two-component epoxy filler suitable for use on polyester, metal and stable wood structures. This epoxy boat filler is extremely water-resistant, making this product very suitable for osmosis repairs. In addition, Watertite boat filler has an easy 1:1 mix ratio (volume) and fills up to 20 mm thick without sagging. 

Apply the shrinkage-free watertite epoxy filler easily with a putty knife to various substrates. After application, Watertite can be repainted very quickly with, among others: Gelshield 200InterprotectYacht primer and Primocon. Check the properties and technical documentation for repainting times.

Benefits of Watertite boat filler

  • Fast drying epoxy filler
  • Extremely water-resistant  (suitable for osmosis repairs)
  • For use above and below the waterline
  • Very strong and good adhesion properties
  • Easy to use (1:1 mixing ratio)


International Watertite is suitable for use above and below the waterline on the following substrates:

  • Aluminum/Zinc-galvanized steel
  • Cast iron
  • Polyester (gelcoat)
  • Lead
  • Steel
  • Wood

Product properties

Contents: 250 ml and 1 Liter
Gloss: matt
Density: 1.14 gm/cc
Volume % solids: 100%
Mixing ratio: 1:1 in volume (as delivered)
Shelf life: 2 years
Application method: filling knife
Recommended number of coats: 1-2
Practical yield: 12.00 (m2/L)
Processing time: 25 minutes
Can be sanded after: 4.5 hours (at 23°C)

  • minimum after: 4.5 hours (at 23°C)
  • maximum after: unlimited
For more information on International Watertite, check the technical documentation or the Safety Sheet A & B.   

We have a number of recommendations for working safely with polymers. At Polyestershoppen you will not only find the polymers themselves, but you can also purchase all the protective equipment you need from us. If you have any doubts or questions, please contact our customer service. We can give you advice on how to work safely with polymers.

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