News Update !
watch here for news bulletins

Vermitex® ‘TH’

Hydrocarbon Fire
(Interior and Exterior applications)

Product Description

Vermitex® ‘TH’ is a Vermiculite Special Cement blend plus trace chemical additives and lightweight polymer microspheres which has been formulated and tested for application to concrete elements in Hydrocarbon environments which require passive fire protection upgrade.

 

Recommended Uses

Application may be carried out by hand but preferably by mechanical means to interior or exterior, concrete and other substrates generally without the aid of mechanical reinforcement (1). Vermitex® ‘TH’ may also be applied to a multitude of backgrounds to enhance the Fire Resistance Level (FRL) of building and construction elements and at the same time provide a durable finish. This Data Sheet addresses application to both interior as well as exterior elements.

 

Product Characteristics

Description: Proprietary cementitious material
Finish: Monolithic, can be trowelled
Colour: Grey with pink tones
Packaging: 50 Lt. bag
Coats: One or more as required
Cure: Hydraulic set
Initial Set: 6 to 8 hours
Coating interval: Up to 8 hours

 

Tested Properties

Applicable standards AS 1530.4; BS 476 Part 20 to 24; ASTM E119; BSEN 1363 Part 2; ISO 834-1 Part 1, 6.1.1
Fire Resistance Level: 1 to 4 hours inclusive
Specific Weight: 400 kg/m³ (± 10% at bagging)
pH: 12 - 12.5
Thermal Conductivity: 0.114 W/m.K ± 10%
Compressive Strength (MPa): 6.4
Vermitex® ‘HX’ Bond Strength to ASTM E 736 to:  
Black steel, Avg. Load (MPa) 0.36
Primed steel (‘Galmet’ Coating), Avg. Load (MPa) 0.369
Concrete, Avg. Load (MPa) 0.355

 

Vermitex® ‘DX’ thickness range

Steel members configuration
3 sided
4 sided
Hp/A Value (m-1)
47.1 to 282.6
55 to 439.6
corresponding ESA/M (m²/Tonne)
6 to 36
17 to 56
 
Thickness (mm)
Vermitex® ‘TH’ thickness for 60/ _ / _ FRL:
8-11 mm
12-18 mm
Vermitex® ‘TH’ thickness for 90/ _ / _ FRL:
8-17 mm
12-24 mm
Vermitex® ‘TH' thickness for 120/ _ / _ FRL:
11-22 mm
12-31 mm
Vermitex® ‘TH’ thickness for 180/ _ / _ FRL:
21-34 mm
19-43 mm
Vermitex® ‘TH’ thickness for 240/ _ / _ FRL:
30-45 mm
30-56 mm

 

Application Instructions

Vermitex® ‘TH’ is a mill-mixed compound that can be sprayed onto substrates requiring protection at the corresponding thickness stipulated by the Manufacturer (refer Thickness Tables over). The element being protected should be free from: mill scale, heavy rust, oil, excessive dust or any other substance which may impair proper adhesion of the Vermitex® ‘TH’ to the background. (2)

Mechanical reinforcement would not be normally required for interpolated thickness specified in the Thickness Tables, however it is highly recommended that, in Severe Industrial and Coastal Marine Environments and where exposure to flexural stresses, vibrations, thermal expansion as well as construction movement is present, the Designer specify the installation of mechanical reinforcement to follow the contour of the element, with the mesh located approximately 2/3 through the spray thickness. All reinforcement shall be Galvanised and equal to: Flat or Corrugated Expanded Metal Lath with or without longitudinal ribs/stiffeners and Hexagonal or Square Mesh (minimum 1.0 mm wire). Substitution with stainless steel wire mesh is acceptable.


Vermitex® ‘TH’, when applied in well ventilated areas to a thickness of 25 mm, will dry in 2-3 weeks. Please note that Vermitex® ‘TH’ is prone to frost damage and temperatures surrounding the areas being sprayed should not be allowed to fall below 4°C for at least 12 hours, after installation. The material can be applied to a thickness of 20 mm in one application, thicker applications are possible, however this will depend on the state of the background being sprayed, its water-uptake capacity and the experience of the applicator. Multiple coatings will achieve a smooth and even textured finish, however a new coating should only be applied over one that has partially set. Where this is not possible the last coating surface should be left with a ‘deep & rough texture’ or purposefully scratched. When ‘Trowelling’ or ‘Ruling’ is unavoidable the applicator should not ‘overwork’ or ‘polish’ the sprayed material.


Vermitex® ‘TH’ may be painted with suitable sealers and paints. Consult the LAF Group for compatibility.
For severe Industrial and Coastal Marine Environments special application conditions relating to Vermitex® ‘TH’ please refer to the third paragraph of "Bond Coat, Primer Compatibility and Corrosion prevention" as the Vermitex® ‘TH’ cannot be relied upon as a rust preventative coating(2) in fully exposed locations.

 

Bond Coat, Primer Compatibility and Corrosion prevention

When applying Vermitex® ‘TH’ to concrete elements without the aid of mechanical reinforcement a ‘Bond Coat’ equal to Vermitex® ‘7’ is mandatory. No specific thickness is required when spraying Vermitex® ‘7’, however a coverage of between 50% and 75% of the area is required. Vermitex® ‘7’ will enhance the adhesion of the Vermitex® ‘TH’ to the substrate, facilitate the application as well as reduce ‘slippage’ on smooth vertical backgrounds.


Smooth and painted concrete require special attention. Some paints (eg acrylic) will impair and at times preclude proper adhesion of the Vermitex®. In these cases the paint should be totally removed, the concrete roughened or mechanical retention employed (ie mesh, discontinuous fixings, etc.). The paint composition and the concrete configuration (re-entrant profile etc.), are likely to determine which remedy will provide the best outcome (2).


As mentioned in Application Instructions Vermitex® ‘TH’ cannot be relied upon as a water barrier or rust preventative coating as it is porous and allows the passage of water/moisture through to the substrate. If a concern exists about moisture presence or ingress, the substrate should be suitably primed with an approved coating. Chemicals which have an impact on Cement or plaster will also have an impact on Vermitex® ‘TH’, in these circumstances the Vermitex® ‘TH’ and ‘AF’ must be topcoated with suitable protective coatings (2).


Only stainless steel protective ‘Angle Corner Beads’ should be used for exterior applications.

Vermitex® ‘7’ may react with Aluminium and Aluminium alloys and a suitable primer is recommended (2).

 

Coverage

One 50 litre bag of Vermitex® ‘TH’ will cover approximately 1 m² at a nominal thickness of 50 mm (without wastage considerations).

 

Vermitex® Specification (Broad Form)

Before commencing the Vermitex® ‘TH’ application, the substrate shall be inspected by the Main Contractor to ensure all elements to be sprayed are free from any substance which might impair proper adhesion of the spray material


All adjacent areas not requiring treatment shall be suitably protected against droppings and overspray.
Vermitex® ‘TH’ as manufactured by L & A Fazzini Manufacturing Pty Ltd shall be installed by an approved Specialist Contractor to the thickness of ..xx.. mm to provide a Fire Resistance Level of ..aaa / bbb / ccc ..(insert required thickness and FRL).. .


The Specialist Contractor shall provide all materials, accessories, spray equipment, tools, inspection services and labour to satisfactorily carry out the works in best trade practice. All workmanship and installation techniques shall comply with the Manufacturers ‘Application Instructions’, relevant Building Code Statutory requirements and applicable ASTM, BS or AS Standards.

 

Test Data & Assessments

Tests have been carried out in accordance with AS 1530 Part 4, BSEN 1363 Part 2, ISO 834-1 Part 1, 6.1.1 or BS 476 Part 20 to 24. The CSIRO has referenced, analysed and assessed the test data for compliance to other International Standards. The material thicknesses stipulated in the Tables herein can be referenced against and fully comply with Australian (AS), British (BS) and American (ASTM) Standards (2).

Refer to Test Data for more information.

Note:
1. Refer to LAF for mesh requirement details and for other Vermitex® ‘TH’ applications

2. Refer to LAF for further detailed information

 

Vermitex® ‘TH’ Thickness Table

Tested to AS 1530.4 and BS 476, Part 20 Appendix D; BS 476, Part 20 to 24; ISO 834-1 Pt 1, 6.1.1; BSEN 1363 Part 2.

Hp/A
Fire Resistance Period (minutes)
Fire Resistance Period (minutes)
m-1
Three Sided Exposure
Four Sided Exposure
 
60
90
120
180
240
60
90
120
180
240
47.1
8
8
11
21
30
N/A
N/A
N/A
N/A
N/A
55.0
8
9
14
24
33
12
12
12
19
30
62.8
8
10
15
25
35
12
12
12
22
34
70.7
8
11
16
26
36
12
12
13
25
36
78.5
8
12
17
27
37
12
12
15
27
38
86.4
8
12
17
28
38
12
12
17
29
40
94.2
8
13
18
28
38
12
12
18
30
42
102.1
8
13
19
29
39
12
13
19
31
43
109.9
8
14
19
29
40
12
14
20
31
44
117.8
9
14
19
30
41
12
15
21
33
45
125.6
9
14
20
30
41
12
16
22
34
46
133.5
9
15
20
31
41
12
17
23
35
47
141.3
9
15
20
31
42
12
17
23
35
48
149.2
10
15
20
31
42
12
18
24
36
48
157.0
10
15
21
31
42
13
18
24
37
49
164.9
10
15
21
32
42
13
19
25
37
49
172.7
10
16
21
32
43
13
19
25
37
50
180.6
10
16
21
32
43
13
19
26
38
50
188.4
10
16
21
32
43
14
20
26
38
51
196.3
10
16
21
32
43
14
20
26
39
51
204.1
11
16
22
32
43
14
20
27
39
51
212.0
11
16
22
33
44
14
21
27
39
52
219.8
11
16
22
33
44
15
21
27
39
52
227.7
11
16
22
33
44
15
21
27
40
52
235.5
11
16
22
33
44
15
21
28
40
52
243.4
11
17
22
33
44
15
21
28
40
53
251.2
11
17
22
33
44
15
22
28
40
53
259.1
11
17
22
33
44
16
22
28
41
53
266.9
11
17
22
33
44
16
22
28
41
53
274.8
11
17
22
33
44
16
22
28
41
54
282.6
11
17
22
34
45
16
22
29
41
54
290.5
====
====
====
====
==>
16
23
29
41
54
298.3
===
Refer
4sided
results
==>
16
23
29
41
54
306.3
====
====
====
====
==>
16
23
29
42
54
314.0
====
====
====
====
==>
17
23
29
42
54
321.9
====
====
====
====
==>
17
23
29
42
54
329.7
====
====
====
====
==>
17
23
29
42
55
337.6
====
====
====
====
==>
17
23
30
42
55
345.4
===
Refer
4sided
results
==>
17
23
30
42
55
353.3
====
====
====
====
==>
17
23
30
42
55
361.1
====
====
====
====
==>
17
24
30
42
55
369.0
====
====
====
====
==>
17
24
30
43
55
376.8
====
====
====
====
==>
17
24
30
43
55
384.7
====
====
====
====
==>
18
24
30
43
55
392.5
===
Refer
4sided
results
==>
18
24
30
43
55
400.4
====
====
====
====
==>
18
24
30
43
56
408.2
====
====
====
====
==>
18
24
30
43
56
416.1
====
====
====
====
==>
18
24
30
43
56
423.9
====
====
====
====
==>
18
24
31
43
56
431.8
====
====
====
====
==>
18
24
31
43
56
439.6
===
Refer
4sided
results
==>
18
24
31
43
56

 

Vermitex® ‘TH’ - Structural Adequacy & Integrity upgrade for Concrete Slabs

Vermitex® ‘TH’ (thickness in mm) required for upgrading FRL of Structural Adequacy and Integrity of Concrete Slabs with less than the required concrete cover to steel reinforcement
Concrete Cover Range (mm)
Thickness Range of Vermitex® ‘TH’
Thickness Range of Vermitex® ‘TH’ Required FRL for Structural Adequacy & Integrity
 
30/30/ _
60/60/ _
90/90/ _
120/120/ _
180/180/ _
240/240/ _
5
6
9
14
17
23
29
10
3
6
11
14
20
26
15
Nil
3
9
11
17
23
20
 
Nil
6
9
14
20
25
 
 
3
6
11
17
30
 
 
Nil
3
9
14
35
 
 
 
Nil
6
11
40
 
 
 
 
3
9
45
 
 
 
 
Nil
6
50
 
 
 
 
 
3
55
 
 
 
 
 
Nil


Vermitex® ‘TH’ - Structural Adequacy & Integrity upgrade for Pre-stressed Concrete Slabs

Vermitex® ‘TH’ (thickness in mm) required for upgrading FRL of Structural Adequacy and Integrity of Pre-stressed Concrete Slabs with less than the required concrete cover to steel reinforcement
Concrete Cover Range (mm)

Thickness Range of Vermitex® ‘TH’

Thickness Range of Vermitex® ‘TH’ Required FRL for Structural Adequacy & Integrity

 
30/30/ _
60/60/ _
90/90/ _
120/120/ _
180/180/ _
240/240/ _
5
9
11
17
20
29
34
10
6
9
14
17
26
31
15
3
6
11
14
23
29
20
Nil
3
9
11
20
26
25
 
Nil
6
9
17
23
30
 
 
3
6
14
20
35
 
 
Nil
3
11
17
40
 
 
 
Nil
9
14
45
 
 
 
 
6
11
50
 
 
 
 
3
11
55
 
 
 
 
Nil
6
60
 
 
 
 
 
3
65
 
 
 
 
 
Nil


Vermitex® ‘TH’ - Structural Adequacy & Integrity upgrade for Concrete Walls

Vermitex® ‘TH’ (thickness in mm) required for upgrading FRL of Structural Adequacy and Integrity of Concrete Walls with less than the required concrete cover to steel reinforcement
Concrete Cover Range (mm)

Thickness Range of Vermitex® ‘TH’

Thickness Range of Vermitex® ‘TH’ Required FRL for Structural Adequacy & Integrity
 
30/30/ _
60/60/ _
90/90/ _
120/120/ _
180/180/ _
240/240/ _
5
9
9
17
20
23
26
10
6
6
14
17
20
23
15
3
3
11
14
17
20
20
Nil
Nil
9
11
14
17
25
 
 
6
9
11
14
30
 
 
3
6
9
11
35
 
 
Nil
3
6
9
40
 
 
 
Nil
3
6
45
 
 
 
 
Nil
3
50
 
 
 
 
 
Nil


Vermitex® ‘TH’ - Structural Adequacy & Integrity upgrade for Pre-stressed Concrete Walls

Vermitex® ‘TH’ (thickness in mm) required for upgrading FRL of Structural Adequacy and Integrity of Concrete Walls
with less than the required concrete cover to steel reinforcement
Concrete Cover Range (mm)

Thickness Range of Vermitex® ‘TH’

Thickness Range of Vermitex® ‘TH’ Required FRL for Structural Adequacy & Integrity
 
30/30/ _
60/60/ _
90/90/ _
120/120/ _
180/180/ _
240/240/ _
5
14
14
14
14
17
23
10
11
11
11
11
14
20
15
9
9
9
9
11
17
20
6
6
6
6
9
14
25
3
3
3
3
6
11
30
Nil
Nil
Nil
Nil
3
11
35
 
 
 
 
Nil
6
40
 
 
 
 
 
3
45
 
 
 
 
 
Nil

 

Vermitex® ‘TH’ - Insulation upgrade for Normal & Pre-stressed Concrete Slabs and Walls

Vermitex® ‘TH’ (thickness in mm) required to upgrade FRL Insulation Criteria for Normal & Pre-stressed Concrete Slabs and Walls with less than the required overall concrete thickness
Concrete Cover Range (mm)

Thickness Range of Vermitex® ‘TH’

Thickness Range of Vermitex® ‘TH’ Required FRL for Insulation
 
-/ - /30
- / - /60
- / - /90
- / - /120
- / - /180
- / - /240
75
Nil
3
14
26
43
54
80
 
Nil
11
23
40
51
85
 
 
9
20
37
48
90
 
 
6
17
34
45
95
 
 
3
14
31
43
100
 
 
Nil
11
28
40
110
 
 
 
6
23
34
120
 
 
 
Nil
17
28
130
 
 
 
 
11
23
140
 
 
 
 
6
17
150
 
 
 
 
Nil
11
160
 
 
 
 
 
6

N.B. - Grey Background denotes Mechanical Reinforcement is required

Health Statement

Vermitex® ‘TH’ contains no asbestos and presents no known health hazard before, during or after application. Normal precautions relevant to the handling of cement and plaster products apply: dust mask, eye protection and covering of sensitive skin.

For more information or MSDS on Vermitex® ‘TH’ or any other products,

please see the technical data page, or contact: L & A Fazzini Manufacturing Pty Ltd

  
 

 

Back to top

L & A Fazzini Pty Ltd - ABN 68 000 330 496
L & A Fazzini Manufacturing Pty Ltd - ABN 67 000 439 485

New South Wales Office
Address: 21-25 Wentworth Street Greenacre NSW Australia 2190
Postal Address: PO Box 13 Greenacre NSW Australia 2190
Contact Details: Tel 61 2 9642 4745, Fax 61 2 9742 5164
Freecall 1800 629 305 (for Australian Clients only)

Email:sales@lafgroup.com

 

  
Copyright: All material is original and remains the property of L & A Fazzini Mfg Pty Ltd
and may not be used without permission. No person is to use the enclosed information
for inclusion in reports, publications etc etc without the consent of the LAFGroup