Crystalfix Mr Crystal is a 4kg do-it-yourself concrete repair kit that seals leaking tanks and troughs by growing insoluble crystals inside the concrete itself. It suits farm water tanks, stock troughs, pools, pits, ponds and cellars where the concrete is cracked or porous but still structurally sound.

Key features

4kg kit treats about 18 metres of crack or 40 square metres of porous surface, roughly one 45,000 litre tank or 5 average troughs
Mix the powder with water to a paintable slurry and brush it over the crack, or dry shake it over wet concrete for porous areas
Migrates up to 400mm into the concrete and keeps repairing as the structure moves, reactivating whenever water is present
Wall cracks can be treated from the outside while the tank is full; floor cracks need the tank emptied
Safe for potable (drinking) water and protects steel reinforcing from rust
Noticeable results in 3 to 7 days, full crystal growth in about 21 days
Helps waterproof tanks in line with AS 3735 (Concrete structures for retaining liquids)
Made in Australia, application brush included

Suitable for

Concrete water tanks, stock troughs, pools, pits, ponds, cellars and suspended slabs
Concrete only: it uses the existing concrete as part of its chemistry, so it will not work on poly, steel or fibreglass tanks
Structures with basic structural integrity. Badly rusted reinforcing or large cracks may need extra work, see the manufacturer's directions booklet

How to use

Clean the area thoroughly and wet it immediately before applying
Mix about 1kg of powder to 375ml of clean water to a thick, paintable slurry. Mix only what you can use in 10 to 15 minutes
Brush a 50 to 60mm wide strip over the crack, then a second coat once the first goes tacky, building to about 6mm
Keep the repair damp for the first 36 hours. Refilling the tank is usually enough
Apply between 10°C and 25°C. Crystalfix is alkaline, so wear gloves and eye protection

Specifications

Brand: Crystalfix
Product: Mr Crystal Tank Repair Kit
Size: 4kg
Type: Cement-based crystal growth waterproofing powder
Coverage: 18m of crack or 40m² of porous surface per kit
Application temperature: 10°C to 25°C
Made in Australia

Crystalfix Mr Crystal Concrete Tank & Trough Repair Kit 4kg