What Product Should I Use to Fill Deeper Dents in Resin Furniture?

Selecting the Right Filler for Deep Cavities

For deep dents in resin furniture, a fibreglass-reinforced putty is your best option. The CROP 2K Fiberglass Putty – 750 ml + Hardener is designed specifically for filling and levelling deeper cracks and holes in plastics, metal and composites. Its reinforced structure offers excellent strength to prevent further damage, while also resisting moisture and chemicals, making it a reliable choice for both indoor and outdoor furniture.

Step-by-Step Application Process

• Clean the area: Ensure the surface is grease- and dust-free. A natural degreaser, such as Strong Technical Degreaser for Resin Projects, is gentle and effective for this purpose.
• Prepare the putty: Mix the fibreglass putty with its hardener as instructed. Only prepare as much as you’ll use at once, since the mixture begins to cure quickly.
• Apply in layers: Introduce the putty into the dent, pressing it in firmly. For particularly deep holes, build up the repair in layers, allowing each to partially cure before adding the next. Shape and smooth as needed.
• Finishing touches: Allow the putty to fully cure, then sand the area carefully for a seamless finish. The repaired spot is now ready for priming and painting.

When This Approach Matters Most

This method is best when standard fillers just aren’t tough enough—such as on garden chairs subject to heavy use or if cracks have weakened the structural integrity of the furniture. For smaller chips or surface scratches, an epoxy adhesive or standard filler may suffice, but fibreglass putty provides the reinforcement needed for long-lasting, deep repairs.