Marine Tex Gluvit Waterproof Epoxy Sealer 2 Lb. Kit

A Waterproof Epoxy Sealer Built for Marine Environments

Marine-Tex Gluvit is a waterproof epoxy sealer formulated to protect and restore boat hulls, decks, and structural components. Unlike rigid epoxy systems that can crack under the constant flexing of a hull, Gluvit cures to a hard yet flexible coating that moves with the substrate. This makes it particularly effective at bridging and sealing hairline cracks, pinholes, and leaky seams that would otherwise allow water intrusion.

Whether you're dealing with weeping rivets on an aluminum fishing boat, deteriorating planking on a classic wooden sailboat, or fiberglass blistering on a cruiser, Gluvit provides a reliable waterproof barrier that stands up to the demands of marine service.

Multi-Surface Protection: Fiberglass, Wood, Aluminum, and Steel

One of Gluvit's greatest strengths is its compatibility with a wide range of hull and deck materials. Each substrate benefits from the epoxy's unique combination of flexibility, adhesion, and penetrating ability.

• Fiberglass — Acts as a barrier coat to minimise water absorption and reduce the risk of osmotic blistering. Fills minor cracks and pinholes in gelcoat surfaces.
• Wood — Penetrates deep into porous or rotted wood to strengthen and seal stringers, decking, and moulding against further deterioration and marine parasites.
• Aluminum — Seals leaky seams and rivets while providing a barrier coat that helps minimise galvanic corrosion, especially in saltwater environments.
• Steel — Provides a tough, waterproof protective layer over steel surfaces exposed to marine conditions.

How to Apply Gluvit Epoxy Sealer

Gluvit is straightforward to apply, making it accessible to both experienced boatyard hands and weekend DIY boaters. The two-part epoxy mixes easily and offers a generous working time of approximately 60 minutes at 22°C (72°F), giving you plenty of time to complete larger repair areas without rushing.

• Remove all contaminants from the repair area using solvent or a strong detergent cleaner.
• Sand the surface with 80–100 grit sandpaper to create a mechanical profile for adhesion, then wipe clean with dry rags.
• Mix the resin and hardener according to the kit instructions.
• Apply Gluvit with a brush or roller at 6–8 mils thickness. Lightly tip with a foam brush to smooth the surface if desired.
• Allow to cure overnight. For UV protection, overcoat with any marine paint or coating compatible with epoxies after full cure.
• Gluvit can be thinned with lacquer thinner for deeper penetration into porous or rotted wood.

Sealing Leaky Aluminum Hulls

Leaky seams in aluminum hulls are notoriously difficult to seal permanently. Conventional sealants often crack or peel as the hull flexes under load and wave action. Gluvit's flexible epoxy formula is specifically suited to this challenge — it bonds firmly to properly prepared aluminum and moves with the hull to maintain a watertight seal over time.

For exceptional corrosion resistance in saltwater, Gluvit can be applied over individual rivets or across an entire hull bottom. The finely ground fillers in the formula also provide superior abrasion resistance, protecting against damage from beaching, grounding, or trailering.

Renewing Soft or Rotted Wood

Dry rot is a common and costly problem on boats with wooden cabins, decks, or structural members. Gluvit's long open time allows it to penetrate deep into porous or rotted wood, consolidating weakened fibres and sealing against further attack by vermin or weathering.

For severely deteriorated areas, drill small holes into the damaged wood and fill with Gluvit. The epoxy will be absorbed into the surrounding material, hardening and strengthening it from within. The resulting waterproof coating also protects stringers, decking, and moulding against ongoing moisture damage.

Specifications

• Kit Weight: 2 lb.
• Coverage: 25–35 sq. ft. at 6–8 mils
• Recommended Application Thickness: 6–8 mils
• Work Time: Approximately 60 minutes at 72°F (22°C)
• Cured Colour: Natural (amber)
• Compatible Substrates: Fiberglass, wood, aluminum, steel
• Application Method: Brush or roller
• Thinner: Lacquer thinner
• Surface Preparation Grit: 80–100 grit sandpaper
• Resin Density: 1.47 g/cm³
• Resin Specific Gravity: 1.47
• Resin Flash Point: > 400.0°F (> 204.4°C) Pensky-Martens Closed Cup
• Hardener Density: 0.98 g/cm³ (estimated)
• Hardener Specific Gravity: 0.98 (estimated)
• Hardener Flash Point: > 250.0°F (> 121.1°C) Setaflash
• Cure Time: Overnight
• MFG Part Number: RM330KC
• Manufacturer: ITW Engineered Polymers

Key Features 

• Flexible waterproof barrier — cures hard yet flexes with hull movements to bridge and seal hairline cracks without checking or cracking
• Finds and fills leaks — penetrates seams, rivets, pinholes, and micro-cracks to create a watertight seal
• Multi-substrate compatibility — works on fiberglass, wood, aluminum, and steel surfaces in a single product
• Galvanic corrosion protection — acts as a barrier coat on aluminum hulls to minimise electrochemical degradation in saltwater
• Wood restoration capability — long open time allows deep penetration into porous or rotted wood to consolidate and strengthen structural members
• Generous working window — approximately one hour of work time lets you tackle larger repair areas without rushing
• Abrasion-resistant finish — finely ground fillers protect hull bottoms from grounding, beaching, and trailering damage
• Simple application — applies easily with a standard brush or roller and can be thinned for penetrating applications
• Overcoatable with marine paints — accepts antifouling, topside, and deck coatings that are compatible with epoxies
• Minimises fiberglass blistering — reduces water absorption through gelcoat to help prevent osmotic blister formation