Explore top fiberglass materials and supplies that cover raw fabrics, resins, and vacuum-bagging essentials. This guide highlights reliable items for hand layups, structural repairs, and marine applications, with product details to help you compare performance, handling, and compatibility across common resin systems.
Summary of Selected Products
| Product | Brand | Highlights |
|---|---|---|
| Fiberglass Chopped Strand Mat 1.5 Oz. 3 Yards | Fiberglass Supply Depot | Barrier layer for gelcoat, bond layer between biaxle and woven |
| Premium Polyester Resin w/Hardener | Fiberglass Supply Depot | No-run, no-sag, Iso resin blend; flexible and waterproof |
| 1708 Fiberglass 45/45 DBM Biaxial 50″ Wide | Fiberglass Supply Depot | Structural repair staple; supports transoms and stringers |
| Fibre Glast Breather Bleeder Cloth, 1 Yard | Fibre Glast | Even vacuum pressure; absorbs excess resin |
| Fibre Glast High-Temp No-Leak Vacuum Seal Tape | Fibre Glast | Leakproof seal for vac bag layups; high-temperature tolerance |
Fiberglass Chopped Strand Mat 1.5 Oz. 3 Yards
Use as a barrier between gelcoat and woven, or as a bond layer between biaxle and woven. This 1.5 oz mat provides uniform strength and stiffness in all directions, enhancing laminate consistency in hand layups and larger parts. It pairs well with epoxy, polyester, or vinyl ester resins and supports controlled resin uptake to minimize print-through and warping.
Premium Polyester Resin w/Hardener for Laminating Fiberglass
Iso blend polyester resin offers a no-run, no-sag formulation suitable for marine repairs and boat construction. The resin tends to be more flexible and water-resistant than standard polyester, making it a solid choice for repairs on various surfaces. Mixed with a suitable MEKP catalyst, it cures to a durable, water-resistant laminate. Ideal for repairs on hulls, decks, and fiberglass structures.
1708 Fiberglass 45/45 DBM Biaxial 50″ Wide
This biaxial fabric comprises 45/45 degree orientations backed with 3/4 oz mat. It is widely used for structural repairs, such as rebuilding transoms or stringers on boats. The material delivers strong laminate performance with predictable layup behavior, especially in load-bearing areas that require high stiffness and impact resistance.
Fibre Glast Breather Bleeder Cloth, 1 Yard
Breather/bleeder fabric serves as a vacuum bagging support layer. Placed under bagging film, it helps create even vacuum pressure and absorbs excess epoxy, resulting in stronger, lighter, and more uniform parts. Suitable for manual layups and vacuum-assisted processes, it pairs well with carbon, fiberglass, and Kevlar laminates.
Fibre Glast High-Temp No-Leak Vacuum Seal Tape
Seal and stabilize vacuum bagging operations with high-temp resistant tape that bonds securely to metal, fiberglass, or graphite surfaces. It resists leaks during cure and peels away cleanly at completion. Ideal for complex bagging paths and multi-part laminates where maintaining vacuum integrity is critical.
Fiberglass Repair Kit – 1 Gallon Resin & 8 Yards of Fiberglass
This repair kit provides a complete solution for common composite repairs, including fiberglass cloth, resin, mixing supplies, gloves, and brushes. Cures to a hard tack-free finish, making it suitable for boats, autos, and general fiberglass repairs. It offers a practical, ready-to-use option for quick patch jobs and larger refurbishment projects.
Buying Guide
Choosing the right fiberglass materials depends on project goals, resin system, and processing method. Consider these factors to ensure you get durable, build-ready laminates:
- Resin compatibility: Polyester, epoxy, and vinyl ester resins each have different cure profiles and barrier properties. Match fabric weight and resin viscosity to your application for optimal wet-out and minimized print-through.
- Fabric selection: Chopped strand mat (CSM) provides good resin uptake and predictability for layups, while biaxial fabrics (like 45/45 DBM) offer high strength in critical directions. Woven roving increases tensile strength and impact resistance for larger components.
- Vacuum bagging accessories: Bleeder/breather cloth, seal tape, and proper bagging film improve compaction, remove excess resin, and help achieve lighter, stronger laminates. Ensure compatibility with your bagging setup and cure temperature.
- Layering strategy: Use barrier layers or bond coats when transitioning between gelcoat, woven fabrics, and mat. This reduces print-through and improves overall laminate integrity.
- Safety and handling: Follow manufacturer instructions for cure times, catalyst amounts, and ventilation. Work in a well-ventilated area and use appropriate gloves and eye protection when handling resins and catalysts.
- Applications: Marine repair, boat construction, and structural composites may benefit from different fabric weights and orientations. Plan your orientation and overlap to minimize delamination risks in high-stress zones.
- Storage and shelf life: Resin and hardeners should be stored as recommended, protected from heat and moisture. Keep fabrics dry to prevent pre-curing or moisture absorption that could affect resin uptake.
Glossary of Terms
- CSM: Chopped Strand Mat, a random fiber mat used to add thickness and resin flow control.
- DBM: Direct Braided Mesh or 45/45 biaxial fabric, used for directional strength.
- Bleeder/Breather Cloth: Fabric used in vacuum bagging to equalize pressure and absorb excess resin.
- Vacuum Bagging: Process of applying a vacuum to a laminated part to improve resin distribution and reduce voids.