The Ancestral Mordant & Mineral Shield That Has Protected Wood for Centuries

Product Description

We aren’t inventing a solution; we are rescuing a forgotten truth—the very secret that allowed history’s greatest masterpieces to conquer time itself. This Calcined Alum (25g flakes) is the exact mineral that master cabinetmakers and palace architects used as the definitive, timeless treatment. It was an implacable fixer that not only locked colors into royal tapestries but also built a bulletproof shield inside the wood against its greatest enemies (woodworm, moths, and wood-boring beetles).

Unlike modern industrial products that quickly evaporate and leave your timber defenseless, our alum is manually calcined over a wood-fire flame in our Atelier Heritage. This artisan process revives the ancient science of historic wood mineralization. When injected into the galleries alongside a few drops of acetic acid (common vinegar), this "thirsty" mineral expands and vitrifies the wood fibers.

This creates a unique, organic process for how to get rid of woodworm in wood naturally, transforming what used to be food for pests into an indigestible mineral crystal. This is the exact secret why centuries-old beams and museum-grade heritage furniture remain as hard as stone today.

By choosing Legacy Paint, you are not applying a volatile, toxic poison that will end up in your lungs; you are embracing a Modern Heritage approach rooted in materials science to achieve permanent woodworm removal. This physical petrification process fully restores structural density and mechanical strength to weakened wood. It acts as an eternal, breathable barrier—allowing the wood to breathe as the living organism it is, while keeping it permanently shielded.

Specialized Artisan Application

• Saturation & Vitrification: Deep injection to turn fragile woodworm tunnels into rock-solid mineral crystal structures.
• Historic-Grade Fixer & Mordant: When fused with vinegar, it creates an elastic mesh that works in perfect harmony with the wood’s natural movements. Unlike synthetic resin fillers on the market, it will never crack or detach, allowing natural vapor exchange to prevent delamination and wood-rotting fungi.
• Yield & Efficiency (A Small, High-Performance Treasure): Because this is a pure, calcined mineral, these 25 grams are highly concentrated. Once crushed in a mortar and dissolved, its saturation capacity is astonishing. A tiny amount is enough to treat woodworm in antique furniture or carry out deep structural reinforcement on critical beams, ensuring a permanent shield where others only offer a temporary fix. For a medium-sized table leg, a single flake is more than enough.

Technical Ratios & Preparation

For an effective treatment on pieces with moderate to severe damage (such as an antique period chest of drawers), we recommend the following mix:

• 3 - 4 grams of calcined alum (depending on the desired concentration).
• 40 ml of very hot water (essential for a complete mineral dissolution).
• 4 ml of vinegar.

Step-by-Step Application Protocol

To guarantee you learn how to treat woodworm in furniture definitively, follow this mechanical injection process:

1. Deep Cleaning: The wood surface must be completely clean before starting.
2. Injection & Air Displacement: Use a syringe to inject the solution into random entry holes. As you inject, you will see a water bubble push out; this is the trapped air being forced out of the galleries, showing that the inner walls are being fully saturated.
3. Pressure Technique: In that exact second, slide your finger over the hole and press firmly for one moment, lift, and immediately inject into the same spot again.
4. Full Saturation & Shielding: This second load takes advantage of the path opened by the first injection, allowing the alum solution to glide deeper into the hidden network of tunnels without resistance. If you notice another bubble coming out, do not worry; it is just the remaining air escaping, confirming that the internal labyrinth is fully saturated. Once the water evaporates, the mineral crystallizes.

Ultimate Protection Finishes:

• For Interiors: If you want the ultimate method to fill woodworm holes and protect the interior raw wood, apply a single layer using 1g of alum mixed with 50ml of water using a paintbrush. Once completely dry, rub it gently with 0000 steel wool to clean away any excess powder.
• For Exteriors: For maximum protection, apply a wash of 1g of alum to 100ml of water right before applying our mineral distemper paint. While the wood is still damp, apply the distemper so they interact, bonding deep within the grain. This ensures your piece will endure for centuries, aging with that noble, soulful beauty that only true antiques possess.

🌿 Conservation & The Slow Design Process

CONSERVATION: Store in a cool, dry place inside an airtight container, protected from direct light. This mineral is incredibly hygroscopic and has an ultra-potent capacity to absorb ambient moisture.

• Handcrafted in our Atelier Heritage: Elaborating these 25g of calcined alum takes hours of dedicated craftsmanship.
• The Slow Design Philosophy: We work entirely without stock. We only prepare 1 or 2 kilos per batch to keep the mineral fresh and perfectly balanced. If it shows as sold out, we will create it exclusively for you, allowing it to rest naturally before shipping within 3 to 5 days.
• Pure Authenticity: We design, print, and apply every label by hand. If you ever receive a box, jar, or label that looks slightly different, celebrate it as a mark of authenticity. There are no industrial assembly lines here—just the creative freedom of genuine craftsmanship.
• The secret to breaking free from toxic, chemical insecticides.
• FREE SHIPPING INCLUDED (Spain & Islands).

Want to see exactly how this mineral penetrates and saturates timber galleries inside our workshop? Don't miss our full video guide on our channel Muebles al Rescate at: 

[Mineral Injection and Shielding Tutorial].