What You’ll Need

• “EpoxyWood” – Wood Restoration Epoxy Resin for Deep Penetration and Waterproofing: For deep structural cracks and long-term waterproofing.
• Resin Fibreglass Repair Kit – Complete Polyester Resin and Hardener Set: For reinforcing larger or pressure-bearing cracks.
• “Carbon Resin” – Epoxy Resin for Carbon Fiber & Fiberglass Coating: To combine resin with fibre reinforcement in structural repairs.
• CROP 2K Fiberglass Putty – 750 ml + Hardener: Ideal for filling and smoothing wide cracks or cavities before finishing.
• Protective gloves, eye protection, dust mask
• Sanding blocks or electric sander
• Brush, mixing containers, spatula
• Cloths, vacuum or compressed air (for dust removal)

Visual Reference: Resin Repairs in Action

See the transformation! Watch the process of cleaning, filling, and finishing resin repairs on wooden beams for confidence in each step.

Images and demonstrations offer guidance for flawless application and professional results.

Step 1: Prepare and Assess the Wooden Beam

Thoroughly clean and dry the beam to remove all dust, dirt, or previous coatings from the cracked area. Use a cloth and vacuum, and ensure moisture content is minimal; resins require dry timber to bond effectively.

Lightly sand the surface around the crack to create a key for adhesion and eliminate any weak timber fibres. Avoid aggressive sanding that could widen the crack unnecessarily. Clean away sanding dust with a vacuum or compressed air.

Assess crack depth and width—this determines the type and volume of filler required. Deep or structural cracks benefit most from a flowing, penetrating resin, while surface splits may be filled with a thicker putty or reinforced with a resin and mat system in subsequent steps.

Step 2: Mix and Apply the Chosen Resin Solution

Wearing gloves and eye protection, prepare your resin according to the manufacturer’s ratio and mixing instructions. Avoid mixing large quantities, as pot life is limited once combined with hardener.

For hairline or deep internal cracks, use “EpoxyWood” – Wood Restoration Epoxy Resin for Deep Penetration and Waterproofing—its ultra-low viscosity ensures it flows deeply into wood fibres for robust reinforcement. Use a brush or plastic syringe to force resin into the crack, working it in until fully saturated.

Larger gaps or structural weaknesses benefit from combining a fibreglass mat with resin, forming a composite bridge. In such cases, the Resin Fibreglass Repair Kit – Complete Polyester Resin and Hardener Set includes all essentials: resin, hardener, mat, and tools. Cut mat segments to size, lay them over cleaned cracks, and brush the mixed resin through to saturate thoroughly. Allow each layer to cure per instructions before proceeding.

Step 3: Fill and Finish for a Smooth Surface

If minor undulations or gaps remain after the main repair, use a resin-based putty to capture fine details and prepare the surface for final finishing. CROP 2K Fiberglass Putty – 750 ml + Hardener is ideal for this. Mix the required portion, then press firmly into any remaining cavities or along the surface of previously repaired cracks. Smooth gently with a spatula and leave to cure as specified by the product.

Once hard, sand the repaired area to blend seamlessly with the original beam, starting with a coarser grit and progressing to fine grit for a refined finish. Always wear a dust mask when sanding cured resin materials.

Step 4: Cure, Protect and Inspect the Repair

Allow proper curing for best results; resins and composites need full hardening time before exposure to load or re-coating. Check each product’s curing schedule carefully—avoid disturbing or loading the beam prematurely.

Inspect the repair for any voids, missed areas, or sticky spots. If needed, repeat filling or sanding in small sections. For beams exposed externally, consider applying a final protective coat or paint compatible with the chosen resin to enhance UV and weather resistance.

Tips, Common Mistakes, and Troubleshooting

• Work in a well-ventilated, dust-free area for optimal results and safety.
• Avoid overfilling or rushing the curing process—thickness or haste can create weak repairs.
• Follow mixing ratios and temperature guidelines—under- or over-mixing resins compromises bond strength.
• Store unused materials properly; cap tightly and keep in a cool, dry place.
• If bubbly or uneven curing occurs, sand back once hard and recoat with a thin layer of resin.

Finished Repairs: Restored Beams and Protection

Restored wooden beams display renewed strength and visual appeal. Spot the difference pre- and post-repair—careful resin application makes cracks disappear and adds lasting waterproofing.

Protect and beautify your timber structures with suitable resins for peace of mind indoors or outdoors.