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Nurmastic
Bitumen Sealant
NURMASTIC (Rubberized Bitumen Sealant) is a single component, ready to use bitumen sealant with selected grade of asphalt, high content of elastomeric rubber, fibres, mineral filler, anti-sagging agent and fast evaporating solvent. NURMASTIC can be used for sealing and waterproofing of joints, cracks, holes, etc. Once cured, NURMASTIC forms black flexible sealant with excellent adhesion to most of construction products.
Nurmastic is used in
- Sealing low movement joints in concrete pavements, bridges, building structures, etc....
- Sealing joints at waterproofing membrane termination grooves, filling gaps and sealing between brick work and roof flashing.
- Sealant for tiles, slates, manhole covers, around pipe entries, pipe joints, seawalls, subways and basement structures.
- Filling cracks and in roofing materials such as felt, lead, zinc, steel, corrugated cement sheets.
Advantages of using NURMASTIC (Rubberized Bitumen Sealant)
- Single component, ready to use formulation.
- No preheating is required
- Excellent adhesion and bonding properties
- Good expansion and contraction properties
- Good mechanical properties
- Easy applied by tools or by gun
- Resistant to bacterial attack
NurMastic (Rubberized Bitumen Sealant) - Typical Characterstics & Product information
| Property | Standard Specification |
|---|---|
| Color | Black |
| Appearance | Semi Stiff Paste |
| Density, [g/cc] | 1.1 ± 0.05 |
| Flashpoint | 60°C |
| Chemical And Water Resistance | Resistant to: most salt solutions, dilute acids
and alkalis, water and alcohol. Not resistant to: oils, solvents and some detergent solutions |
| Application Information | |
|---|---|
| Application Temperature | +5°C to +35°C |
| Setting Time | 24 to 48 hrs. depending upon conditions of exposure |
| Movement accommodation factor | 10% (for butt joints) |
| Product Information | |||
|---|---|---|---|
| Shelf Life | 12 months from date of manufacture in tightly sealed, undamaged containers. | ||
| Storage Conditions | Should be stored under moderate temperature (+10°C to +40°C). | ||
*All values are subject to 5 - 10 % tolerance
Coverage
1 Kg. of NURMASTIC will approximately fill the following lengths.
| Joint Width (mm) | Joint Depth (mm) | Sealed Length (meters) |
|---|---|---|
| 10 | 5 | 16 |
| 15 | 8 | 8.5 |
| 20 | 10 | 5 |
| 25 | 12 | 3.5 |
| 30 | 15 | 2.2 |
Instructions For Use
Substrate Preparation
- All surfaces should be free from loose debris, dirt and grease. NURMASTIC may be applied to surfaces which are dry or damp but not wet.
- Joint depth must not exceed the width. Ideally the width should be twice the depth. In all cases joint width should not be less than 6 mm.
- Maximum width recommend should not exceed 30 mm.
- It is recommended to use bitumen primer to seal NURMASTIC under dusty conditions or on porous surfaces.
Application
- NURMASTIC can be applied by trowel, putty knife, scraper or caulking gun. Voids and honeycombs should be repaired on the sides and bottoms of the joint before applying the primer.
- If a good finish of joint is required, use masking tape before priming to cover the edges. Remove the tape immediately after applying the sealant.
- Apply NURMASTIC into the joint firmly to ensure complete contact with the joint faces.
- For filling joints in concrete pavements, it is recommended to leave the sealants a few minute below the pavement level.
Mixing
Stir the product thoroughly before use. Product will be ready for use.
Cleaning of Tools
Tools may be cleaned by using white spirit. Any spillage should be wiped off surfaces before the bitumen paint has set.
- Packing: 20Kg Metalic Pails