8 Tips for Applying Fiberglass Resin

Fiberglass resin is used to repair fiberglass surfaces, like those on motorcycles, cars, boats and planes. Because fiberglass can cause damage to one’s health, it is always important to use the product with utmost care. Here are some tips that can be very helpful during the application.

1. Wear Safety Equipment

When working with the chemicals, always make sure to wear protective gloves and clothes to guard the skin from direct contact. The fiberglass resin can be very itchy. It can also burn the skin so be sure to prepare a first aid kit just in case.

Wear a respirator as well. The resin has to be mixed with a catalyst before it can become pliable. These chemicals produce strong fumes and can cause damage to respiratory health. Wear a respirator to ensure the fumes do not get inhaled directly.

2. Provide Sufficient Ventilation

Open the windows and the door during application. If possible, work in an open space where fresh air is very accessible. A respirator may not provide enough protection if the room is enclosed and not well-ventilated.

3. Use Fiberglass Cloth

Fiberglass resin is not enough to provide a strong patch repair. Always use the complete patch system. The area to be repaired or resealed with the resin should be strengthened along with the cloth. The resin only provides the bonding effect. The cloth provides the patch with the needed strength.

4. Use a Paintbrush

There are people who want to use a spray bottle or an airbrush to apply the bonding material over a damaged fiberglass area. However, using a spray requires too much work and thus, more application time. It also requires using more chemicals for thinning (acetone, denatured alcohol, etc.). In order to make the application a lot easier and simpler, use a paintbrush to put the resin on the fiberglass cloth.

5. Apply it on a Rough Surface

Sand the surface of the area to be sealed or repaired. Do not apply the first coat on a smooth surface because it may not stick well. It may also allow air bubbles to form.

6. Apply Multiple Coats

A single coat may not be effective as there may be areas that can be missed accidentally. To ensure that the resin is applied evenly on the surface, apply two or more coats. Do apply it evenly to avoid bulges. In addition, remove any trapped air or wrinkled parts before allowing it to dry.

7. Use Solvents for Thinning

For the first coat, thin the solution with acetone or denature alcohol. This makes it more pliable and easy to seep into cracks and small spaces. During application of the first coat, go past the edges to avoid leaving any space untreated. Use full strength for the succeeding coats.

8. Apply Immediately

When the catalyst is mixed with the resin, it will only take a short period of time for the solution to cure. Therefore, apply the mixed solution as quickly as possible while it is still pliable.