Coring Material is a very important step in your fiberglass project. Coring is what takes a sheet of fiberglass and turns it into a solid panel, for decks, boats, and so much more. Coring material can give the sheet flexibility, rigidity or even insulation (which is important when making a cooler). We carry several different kinds that offer pros and cons. It’s important to find the material that works best for you.
Honeycomb –
- PVC honeycomb with a fiber covering.
- Very flexible and light-weight.
- Does not rot and has great bonding properties.
- 5lb density sheet
Diab –
- Offers several densities (3, 4 and 5lb denisty) for different jobs.
- Much more rigid than plain polyurethane foam
- Tan color (used to be multi-colored).
Polyurethane foam –
- Great in-expensive coring
- Light-weight
- Does soak up resin and has a good bond.
- Does compress if you aren’t using the proper density.
- Greatest R-Value (insulation) of any of our options.
- Sold in 2lb and offered in 4lb density
Kay-Cel –
- 25lb density sheet with 18 oz Woven Roving in the middle
- The most dense, heavy material we have
- Perfect for transoms or pieces with a heavy load
Balsa-Core –
- Seal-coated wood to reduce resin consumption, keeping the weight down and increasing the bond.
- Very lightweight, and inexpensive solution.
- Does eventually rot without proper sealing.
- Very good compression tolerance
Fiberglass Coatings 