Interlux Interprotect Epoxy Barrier Coat Kit - Gray

Interlux Interprotect Epoxy Barrier Coat Kit - Gray

Guard against water intrusion with Interlux 2000E Interprotect, a two-part epoxy coating formulated to protect fiberglass hulls from blistering and damage. Microplate technology forms a dense barrier that prevents water absorption, making it ideal for both new builds and older boats. The gray finish goes on easily and dries into a durable layer that stands up to long-term exposure. Whether you're sealing a freshly built hull or protecting an aging one, this epoxy helps extend hull life and avoid costly repairs. Trusted by pros and DIYers, it's a proven solution for long-term hull protection.

Features:

• Great for preventing and repairing gel coat blistering
• Use on underwater metals, hulls, and keels
• Easy application, fast-drying, no sanding needed
• Offers excellent anti-corrosive protection above and below the waterline

Specifications:

• Finish: Matte
• Number of Coats: 1-5
• Mix Ratio: 3:1 by volume
• Application Methods: Airless spray, brush, spray, roller

Associated Products:

Interlux Reducing Solvent - Spray: Thinner for spray application & clean-up

Interlux Reducing Solvent - Brush: Thinner for brush application & clean-up

Frequently Asked Questions

What does a barrier coat do, and why would I need one?

Interprotect 2000E is a two-part epoxy that forms a dense, water-impermeable layer between your hull and the water. It's primarily used to prevent and remediate osmotic blistering, a condition where water permeates fiberglass gelcoat, trapping moisture in the laminate and causing bubbles or pitting. Blisters are expensive to repair, so applying a proper barrier coat when hauling out or building a new hull is far cheaper preventive maintenance. It's also used as an anti-corrosive primer on underwater metals.

How is the 2000E kit mixed, and is there an induction time?

The kit mixes at 3 parts base (2000E) to 1 part curing agent (2001E) by volume. After mixing, the product must stand for a minimum of 20 minutes (the induction time) before applying. This allows the two components to properly react and lets air bubbles disperse. Only add thinner after the induction period has passed. Mix only what you can use within five hours.

How many coats do I need, and how much product should I buy?

The recommended dry film build is 10 mils total, which takes 4 to 5 coats at 2.6 mils dry per coat. Coverage is 240 square feet per gallon, which is relatively low due to the product's density and the fact that multiple coats are expected. Use the standard formula of length × beam × 0.85 to estimate your hull area, divide by 240, and multiply by the number of coats (typically 5) to calculate gallons needed. The product is available in quarts, gallons, or a case of 2 gallons.

Can I apply Interprotect over existing paint?

It cannot be applied over one-part paints. It's for bare substrates or as a tie coat over compatible Interlux primers such as Interprime 450 VOC (where only one coat is needed). If you're working over an existing hull with one-part antifouling, that paint must be fully removed before applying Interprotect. Check the overcoating chart on the product page for specific minimum and maximum recoat windows when going from Interprotect into your antifouling topcoat.

How long before I can apply antifouling paint over Interprotect?

At 73°F, most Interlux antifouling paints can be applied over the final coat of Interprotect within a window of 5 to 7 hours. If that window is missed, an additional coat of Interprotect is required before the antifouling can be applied. The absolute maximum recoat window, with either another coat of Interprotect or the antifouling topcoat, is 6 months. At colder temperatures the minimum window extends: at 50°F, plan on at least 7 hours before applying antifouling. Full immersion readiness at 73°F is 12 hours from the final coat.

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