International Watertite A+B, 1Lt

International Watertite is a high-strength epoxy filler developed specifically for marine repair and fairing work. It is suitable for GRP/fibreglass, steel, aluminium, lead and rigid wood, when the surface has been correctly prepared and primed according to the International coating system.

Its 1:1 mixing ratio by volume makes the two components easy to measure and mix. Once combined, Watertite creates a smooth, durable filler with excellent water resistance and no shrinkage after curing.

Watertite can fill areas up to 20 mm deep in a single application without sagging, making it suitable for repairing dents, imperfections and damaged areas as well as for fairing surfaces before painting. It can also be incorporated into appropriate osmosis repair systems.

After curing, the surface can be sanded smooth and overcoated with compatible International primers and coating systems.

Key Features

• Two-component epoxy filler
• Suitable for marine repair and fairing
• For use above and below the waterline
• Suitable for GRP, metals and rigid wood
• Excellent strength and adhesion
• Highly water resistant
• Non-shrinking formulation
• Fills up to 20 mm in one application
• Simple 1:1 mixing ratio
• Fast drying and easy to sand
• 100% volume solids
• Size: 1L

Technical Details

• Product: International Watertite
• Type: Two-component epoxy filler
• Colour: Light Blue
• Finish: Matt
• Pack Size: 1L
• Mixing Ratio: 1:1 by volume
• Volume Solids: 100%
• Specific Gravity: 1.14
• VOC: 0 g/L as supplied
• Maximum Thickness per Application: 20 mm
• Application: Spreader / palette knife
• Thinning: Do not thin
• Cleaner: International Epoxy Thinner No. 7
• Sandable at 25°C: Approx. 4.5 hours
• Pot Life at 25°C: Approx. 25 minutes
• Minimum Application Temperature: 7°C

Important: Mix both components thoroughly until an even colour is achieved. The surface must be clean, dry and correctly prepared before application. When carrying out osmosis repairs, follow the complete International osmosis treatment system and recommended primer sequence.

Why Choose International Watertite?

Watertite combines high adhesion, excellent water resistance and fast curing in an easy-to-use epoxy filler. Its ability to build up to 20 mm without sagging makes it particularly useful for hull repairs, surface fairing and preparation before painting, both above and below the waterline.