DU-GROTEX
Flexible Stone Crack & Joint Repair CompoundDU-GROTEX is a flexible, stone-compatible repair compound for filling and sealing cracks, joints and surface defects in marble, granite and stone structures. Its flexible cure absorbs minor movement without cracking or detaching, making it suitable for expansion joints, large cracks and areas subject to subtle substrate movement.
Quick Product Facts
Problems DU-GROTEX is built to solve.
If any of these apply to your project, you've found the right product.
Flexible expansion joints cracking again because a rigid compound was used
Stone joints in movement zones repeatedly opening up after repair
Concrete floor movement causing rigid marble joint repairs to fail
Bathroom stone joints cracking due to minor substrate flex under water
What is DU-GROTEX?
DU-GROTEX is a high-performance stone joint filler and repair compound from DUSH, India's premier Italian stone care brand. DU-GROTEX is a flexible stone crack & joint repair compound — DU-GROTEX is a flexible, stone-compatible repair compound for filling and sealing cracks, joints and surface defects in marble, granite and stone structures. Its flexible cure absorbs minor movement without cracking or detaching, making it suitable for expansion joints, large cracks and areas subject to subtle substrate movement.
Key benefits:
- Flexible Cure
- Stone Compatible
- Expansion Joint Capable
- Gap Filling Paste
Applications:
- Marble expansion joints
- Movement crack repair
- Bathroom stone joints
DUSH is an Italian stone care brand — offices across Hyderabad, Bengaluru, Chennai and Kozhikode.
If you're searching for a professional water based back side sealer for marble, DU-GROTEX is the trusted choice among marble fabricators and installation contractors across India. Problems like marble cracking after installation due to moisture are exactly what DU-GROTEX is formulated to solve. As a moisture sealer before marble installation used in marble factories, fabrication workshops and on-site installations across Hyderabad, Bangalore, Chennai and Mumbai, it provides the bond strength, colour accuracy and durability that marble work demands.
How to use DU-GROTEX.
Follow these steps for best results.
Remove all loose material, dust and contamination from the joint. For movement joints, ensure old filler is completely removed first.
Apply into the joint using a cartridge gun or spatula. Slightly overfill and tool to a smooth finish within the working time.
Allow to cure fully before trimming any proud material flush. The flexible cure is complete within the stated time at room temperature.
Pro tips & common mistakes.
Do This
- Mix both components in the exact ratio stated on the label
- Work in small batches to stay within the product's pot life
- Apply slightly proud of the surface and grind flush after full cure
- Clean tile faces immediately — before epoxy begins to harden
- Keep marble dust and contamination out of the joint before filling
Avoid This
- Try to extend pot life by refrigerating mixed epoxy — it doesn't work
- Apply polyester adhesive over damp or oily surfaces
- Skip the patch test when colour-matching a new marble shade
- Use standard cement grout where epoxy grout is specified
- Grind filled joints before the product has reached full cure strength
Why DU-GROTEX works.
Flexible Cure
Absorbs the minor movement in expansion joints and dynamic cracks that would cause rigid repair compounds to crack again.
Stone Compatible
Chemically compatible with marble, granite and natural stone — does not stain or react with the stone surface.
Expansion Joint Capable
Suitable for movement joints and expansion gaps where flexibility rather than rigidity is the engineering requirement.
Gap Filling Paste
Paste consistency stays in place in gaps and surface voids of all orientations without running.
Durable in Wet Areas
Waterproof when cured — suitable for use in bathrooms, wet areas and outdoor stone where water exposure is constant.
Ready to protect your stone?
Get DU-GROTEX delivered or speak to a DUSH specialist.
DUSH Epoxy Grout vs Traditional Cement Grout
DUSH professional grade vs standard alternatives.
| Feature | DUSH Professional | Standard |
|---|---|---|
| Stain Resistance | ✓ 100% stain-proof — non-porous epoxy | ✗ Porous — stains permanently without sealing |
| Durability | ✓ Does not crack, shrink or crumble | ✗ Cracks within 2–5 years in most installations |
| Maintenance | ✓ Wipe clean — no sealing ever required | ✗ Annual sealing + periodic replacement needed |
| Colour Stability | ✓ Permanent factory colour — never fades | ✗ Yellows and discolours within 1–2 years |
| Waterproofing | ✓ Completely waterproof — ideal for wet areas | ✗ Porous — allows water ingress into tile bed |
| Chemical Resistance | ✓ Resists cleaning agents and pool chemicals | ✗ Degrades under harsh cleaning products |
| Colour Options | ✓ 40+ matched shades available | ✗ Limited range, colours change after drying |
| Long-term Cost | ✓ Higher upfront — zero maintenance cost after | ✗ Low upfront — high recurring regrouting cost |
DU-GROTEX is a flexible repair compound for cracks, joints and surface defects in marble, granite and natural stone that are subject to movement. Unlike rigid epoxy adhesives that crack when the joint moves, DU-GROTEX absorbs movement — making it the correct product for expansion joints, dynamic cracks and areas with...
DU-GROTEX is a flexible repair compound for cracks, joints and surface defects in marble, granite and natural stone that are subject to movement. Unlike rigid epoxy adhesives that crack when the joint moves, DU-GROTEX absorbs movement — making it the correct product for expansion joints, dynamic cracks and areas with substrate movement.
Use a flexible compound like DU-GROTEX when the joint or crack is in a movement zone — expansion joints, joints at room perimeters, or any crack caused by substrate movement. Rigid epoxy in these locations will simply crack again as the movement repeats. Flexibility must be specified, not just bonding...
Use a flexible compound like DU-GROTEX when the joint or crack is in a movement zone — expansion joints, joints at room perimeters, or any crack caused by substrate movement. Rigid epoxy in these locations will simply crack again as the movement repeats. Flexibility must be specified, not just bonding strength.
Yes — DU-GROTEX cures to a waterproof compound that is fully suitable for bathrooms, wet rooms, swimming pool surrounds and other areas of constant water exposure. Its stone-compatible chemistry prevents discolouration of the stone alongside the joint.
Yes — DU-GROTEX cures to a waterproof compound that is fully suitable for bathrooms, wet rooms, swimming pool surrounds and other areas of constant water exposure. Its stone-compatible chemistry prevents discolouration of the stone alongside the joint.
Where DU-GROTEX is used.
Marble expansion joints
Trusted by professionals for marble expansion joints across India.
Movement crack repair
Trusted by professionals for movement crack repair across India.
Bathroom stone joints
Trusted by professionals for bathroom stone joints across India.
Pool area stone sealing
Trusted by professionals for pool area stone sealing across India.
Dynamic substrate crack filling
Trusted by professionals for dynamic substrate crack filling across India.
People also ask about joint filler.
Frequently asked questions.
12 expert answers about DU-GROTEX.
◆ Precautions & Safety Notes
- Wear protective gloves during application.
- Keep out of reach of children.
- Ensure the application area is well ventilated.
- Reseal the container after use and store away from direct sunlight.
- Always patch-test on a small, inconspicuous area before full application.
- In case of skin or eye contact, rinse immediately with water.
Complete stone care, backed by Italian expertise.
Browse the full DUSH Joint Filler range or speak to a specialist.