Schomburg MONOFLEX-XL 20kg Tile Glue S1
MONOFLEX-XL is a high-yielding, S1 flexible cementitious tile adhesive designed for both interior and exterior applications. Packaged in 20 KG bags (Material Number: 204302002), it features a long working time of approximately 2 hours and an open time of 30 minutes, ensuring ease of application. Suitable for thin-bed laying on walls and floors, it allows foot traffic and jointing after 12 hours. With an adhesive bed thickness of 1–10 mm, MONOFLEX-XL ensures reliable drying, even for large-format tiles. Its lightweight fillers enhance coverage while providing excellent compaction properties. Vapour permeable and tested to C2 TE S1 standards (DIN EN 12004), this adhesive delivers superior flexibility and adhesion, making it ideal for both heated and unheated substrates.
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Schomburg MONOFLEX-XL 20kg Tile Glue S1
The Waterproofing Shop
22/872 Canterbury Road
Roselands NSW 2196
Australia
Product Details
How to Use
Technical Specifications
Frequently bought together
Technical overview
Key applications
- Laying ceramic tiles and boards using thin-bed laying
- Walls and floors
- Interior and exterior use
- Heated and unheated substrates
- Large format tiles
- Over firmly adhering existing tiled finishes
- Over bonded waterproofing, subject to the water impact class of DIN 18534 and DIN 18531
Surface suitability
- Concrete (load-bearing, dry, even, sealed in the surface, free of cracks and laitance)
- Cement screed CT (prime absorbent substrates with ASO-Unigrund-GE, ASO-Unigrund-K or ASO-Unigrund-PLUS)
- Calcium sulphate screeds CA and CAF (primed before laying; barrier primer such as ASODUR-GBM when laying large format tiles)
- Mastic asphalt screeds AS
- Magnesia screeds MA (protect with a barrier primer such as ASODUR-GBM to prevent direct contact)
- Floor levelling compounds
- Cement-based plaster, gypsum plaster, cement-lime plaster and lightweight plaster
- Gypsum fibre boards and gypsum boards
- Cement and fibre cement boards
- Decoupling mats and panels, dry screeds, raised floors and tile bearing elements
- Firmly adhering tiled finishes (prime non-absorbent substrates with ASO-Unigrund-S or ASO-Unigrund-PLUS)
- Bonded waterproofing (check the substrate against the planned water impact class of DIN 18534 and DIN 18531)
The substrate must be load-bearing, dry, even, sealed in the surface, free of cracks and free of adhesion inhibiting substances and laitance layers. Substrate and application temperature must be approx. 5 to 25 C. Do not stir or add water to existing material that has already set in order to make it workable again. Use a barrier primer such as ASODUR-GBM to protect substrates that are sensitive to moisture, such as magnesite screeds, from direct contact, and to protect calcium sulphate screeds when laying large format tiles. Protect the product from water, frost, draughts, direct sunlight and mechanical loads until it has dried completely. When laying natural stone and synthetic stone the product-specific properties of the coating materials and the stone manufacturer's laying recommendations must be taken into account, and trial laying is recommended. Rooms, surfaces and building components that expect water exposure after DIN 18534, DIN 18531 and DIN 18535 must be protected by bonded waterproofing. Contains portland cement. It causes serious eye damage, causes skin irritation and may cause respiratory irritation. Avoid breathing dust and wear protective gloves, protective clothing and eye or face protection.
Calculate your coverage
You will need:
Schomburg MONOFLEX-XL 20kg Tile Glue S1
20kg bag
Total coverage: 0 m²
This is an estimate only. Add 10% for wastage.
Technical Specifications
| Classification | C2 TE S1 after DIN EN 12004 |
| Product Type | Cementitious tile adhesive |
| Base Material | Sand, cement, additive |
| Colour | Cement grey |
| Filler | Contains lightweight filler |
| Vapour Diffusion Behaviour | Vapour permeable |
| Reaction to Fire (DIN EN 13501-1) | E |
| Adhesive Bed Thickness | approx. 1 - 10 mm |
| Water Addition | From 7.6 l to 8.8 l per 20 kg |
| Mixing Time | approx. 3 - 5 minutes |
| Maturing Time | approx. 4 minutes |
| Pot Life | approx. 120 minutes |
| Working Time | approx. 2 hours |
| Open Time | approx. 30 minutes |
| Consumption per m2 per mm of Layer Thickness | approx. 0.74 kg |
| Consumption with 6mm Notched Trowel | 1.6 kg/m2 |
| Consumption with 8mm Notched Trowel | 2.1 kg/m2 |
| Consumption with 10mm Notched Trowel | 2.6 kg/m2 |
| Substrate Temperature | approx. 5 - 25 C |
| Application Temperature | approx. 5 - 25 C |
| Foot Traffic After | approx. 12 hours |
| Can Be Walked On and Jointed After | approx. 12 hours |
| Hardening Time / Full Resilience | approx. 7 days |
| Increased Flexibility (deflection of 5 mm or more) | UNIFLEX-F addition of 4 kg per 20 kg container |
| Conductive Option | Addition of ELECTRON-PLUS approx. 2.9 l, with water addition approx. 7.8 l |
| Pack Size | 20 KG (material number 204302002) |
| Shelf Life | Min. 12 months in the original canister, stored cool and dry |
| GISCODE | ZP1 |
| Test Certificates | Test report in accordance with DIN EN 12004, EMICODE licence, AgBB certificate |
Frequently asked questions
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What is MONOFLEX-XL designed for?
ApplicationIt is a deformable C2 TE S1 cementitious thin-bed adhesive for ceramic, porcelain and natural stone tiles on walls and floors, including large-format tiles, wet areas, balconies and underfloor heating substrates.
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How much MONOFLEX-XL will I use?
Coverage & CoatsCoverage depends on notched trowel size: around 1.6 kg/m² with a 6 mm trowel, 2.1 kg/m² with an 8 mm trowel and 2.6 kg/m² with a 10 mm trowel.
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How long is the open time?
Cure & Dry TimeOpen time is around 30 minutes and working time in the bucket is around 2 hours, giving you plenty of room to adjust large-format tiles. Floors are walkable in roughly 12 hours.
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Is MONOFLEX-XL suitable for outdoor and wet areas?
PerformanceYes. It is water and frost resistant and meets EN 12004 C2 TE S1, making it suitable for balconies, terraces, bathrooms and other moisture-prone areas.
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Can MONOFLEX-XL be used over underfloor heating?
CompatibilityYes. The S1 deformability rating accommodates the thermal movement of heated screeds without breaking the bond, provided the heating is commissioned correctly before tiling.
Why trade professionals choose Schomburg
Schomburg is a German building chemicals brand supplied to the Australian trade, covering rising damp treatment, screeds, repair mortar and tile adhesive. The range stocked here runs from the AQUAFIN-F and AQUAFIN-i380 damp course products through to SOLOPLAN-30 self-levelling compound, ASO-SEM engineered screed, ASOCRET5/40 repair mortar and MONOFLEX-XL tile adhesive. It is a practical selection for remedial and preparation work, where getting the substrate right decides whether the finished floor or wall holds up.
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