Product Facts
- Product Name
- Conbextra EP935 - Epoxy Grout for Underwater Applications
- Price
- Available
- Availability
- In Stock
- Condition
- New
- Category
- Construction Materials > Grouting & Adhesives
- Seller
- Fosroc Workspace
- MPN
- Conbextra EP935
Conbextra EP935 - Epoxy Grout for Underwater Applications
A free flowing, water displacing epoxy grout suitable for underwater grouting work and for the repair of water immersed concrete structures. Features excellent adhesion to water immersed concrete, masonry or brick surfaces with high density ensuring complete water displacement. Offers high compressive, tensile and flexural strengths with negligible shrinkage upon curing.
A free flowing, water displacing epoxy grout suitable for underwater grouting work and for the repair of water immersed concrete structures. Features excellent adhesion to water immersed concrete, masonry or brick surfaces with high density ensuring complete water displacement. Offers high compressive, tensile and flexural strengths with negligible shrinkage upon curing.
Price: Available
Brand: Fosroc
Availability: preorder
Product Data (OpenAI Spec)
View Full JSON Spec ↗Specifications
| Condition | new |
|---|---|
| Category | Construction Materials > Grouting & Adhesives |
Product Intelligence
Conbextra EP935: Epoxy Grout for Underwater Applications
Product Overview
Conbextra EP935 is a specialized two-component, finely filled, low-viscosity epoxy resin grout manufactured by Fosroc, specifically engineered for underwater grouting applications and repair of water-immersed concrete structures. The product features exceptional water-displacing properties that enable high-performance suitability in subaqueous environments where conventional grouting methods would be compromised by water presence.
Key Features and Advantages
Conbextra EP935 offers several distinctive advantages for underwater applications:
- Excellent adhesion to water-immersed concrete, masonry, or brick surfaces
- High density ensures complete water displacement during application
- High compressive, tensile, and flexural strengths for reliable structural performance
- Negligible shrinkage upon curing, ensuring dimensional stability
- Pre-measured components allow easy mixing with consistent flow and mechanical properties
- Free-flowing properties ensure rapid application in submerged conditions
Product Composition and Specifications
Conbextra EP935 is supplied as a two-component system with pre-measured components designed for whole pack mixing:
| Property | Specification |
|---|---|
| Color | Base resin is black; hardener is amber liquid; mixed product is grey |
| Mixing proportions by weight | 7.5 base to 1 hardener |
| Mixed specific gravity | Approximately 2.0 |
| Minimum application temperature | 5°C |
| Pot life at 20°C (1kg mix) | 60 minutes |
Mechanical Properties
Conbextra EP935 demonstrates robust mechanical performance:
| Property | Result |
|---|---|
| Compressive strength | 50 MPa at 24 hours; 90 MPa at 7 days |
| Cured density | 1840 kg/m³ |
| Adhesion to concrete | >3 MPa |
| Moisture absorption | <0.1% |
Note: Compressive strengths are measured using cube samples and may vary with alternative testing standards.
Applications
Conbextra EP935 is specifically suitable for:
- Underwater grouting work in submerged environments
- Repair of water-immersed concrete structures requiring high performance
- Bolt and anchor grouting in aquatic conditions
- Applications where mechanical properties must be of the highest order and water displacement is critical
Storage and Shelf Life
Conbextra EP935 components maintain extended shelf life under proper storage conditions:
- Base component: 36 months from date of manufacture when stored in dry conditions in original, unopened packs
- Hardener component: 36 months from date of manufacture when stored in dry conditions in original, unopened packs
Application Instructions
Surface Preparation
For maximum adhesion, the substrate must be clean and free from loose material. Sandblasting is recommended for optimum adhesion to the bonding surface.
Mixing
The product requires a forced-action mixer for proper preparation:
- Pour all hardener (Part B, amber liquid) into the base resin (Part A, black)
- Mix thoroughly until an even grey color is achieved
- Recommended mixer: Slow speed (400/500 rpm) using appropriate equipment such as a Ransom 140 x 600 M14 helical mixing paddle fitted to a heavy-duty 1600W mixer
Placing
- Place immediately after mixing to take full advantage of the limited pot life
- Can be poured to displace water directly in submerged applications
- Can be placed in thicknesses from 12 mm up to 30 mm in a single pour when used as underplate grout
- Where grouting gap exceeds maximum thickness, grout can be filled/bulked out with Conbextra Grout Aggregate to minimize exotherm heat buildup
- Filling ratio should not exceed 2:1 grout to aggregate
Cleaning
All tools and equipment should be cleaned immediately after use with Fosroc Solvent 10 before the epoxy hardens. Hardened material can only be removed mechanically.
Supply and Packaging
Conbextra EP935 is supplied in 15 kg (8.4 litre) two-component, pre-weighed packs:
- Conbextra EP935 Base (MTO): FC520010-6.65L
- Conbextra EP935 Hardener (MTO): FC520015-1.75L
- Minimum order quantity: 63 units
- Lead time: 14-21 days
Temperature Performance and Service Conditions
- During application: Minimum application temperature is 5°C; pot life reduces when temperatures exceed 20°C
- In service: Cured Conbextra EP935 is completely resistant to frost and sub-zero temperatures and temperatures up to 55°C
Important Safety Information
A Safety Data Sheet (SDS) is available from the Fosroc website and should be read carefully prior to use. In emergency situations involving exposure, contact any Poisons Information Centre (phone 13 11 26 within Australia) or consult a doctor for advice.
References
- [1] Fosroc_Conbextra_EP935_TDS.pdf
- [2] Fosroc_Conbextra_EP65_Plus_TDS.pdf
- [3] Fosroc_Conbextra_EP120_Plus_TDS.pdf
- [4] Fosroc_Conbextra_EP300_DP_TDS.pdf
- [5] Fosroc_Construction_Grout_TDS.pdf