Lloyd Insulations (India) Limited
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Rockloyd Slab

Rockloyd Slab - Resin Bonded, Rockwool Slabs
Rockloyd is a precisely engineered Resin Bonded Fibrous Insulation to offer maximum resistance to heat passage. Rockloyd Fibres are spun from selected rocks, melted at 1600°c and blended to a carefully adjusted chemical composition. Its centrifugally spun fibres have a diameter 1/20th that of human hair which are felted using state of art Technology into bonded and cured slabs to optimum density and resilience.

Over 25 million sq. mts. Of Rockloyd Insulation are in service in prestigeous projects within the country saving millions of tones of fuel year after year.

Specification Conformance
Rockloyd Slabs manufactured from select rocks using state of the art technology conforms to and exceeds requirements specified in local & international standards such as

IS 8183: 1993
BS: 3958 Part-5
ASTM C 612

IMO for A15, A-30& A-60 class fire barrier insulation. **
** The only product to carry this certification in India.*

Physical Data for Standard Products

Slab Grade Slab Density kg/m3 Optimum Temperature Limits °c Thickness (mm)** Size (m)
300 48 250 25,40,50,60,65 & 75 1.0x0.50, 1.0x0.60 or 1.2 x 0.75
400 64 300 25,40,50,60,65 &75 1.0x0.50, 1.0x0.60 or 1.2x 0.75
600 96 400 25,40,50,60,65 &75 1.0x0.50, 1.0x0.60 or 1.2x 0.75
900 144 550 25,40,50,60&65 1.0x0.50, 1.0x0.60 or 1.2x 0.75

** Can be made available with increments in thickness of 5mm against special orders.

Water & Moisture Repellence
Rockloyd Slabs by virtue of fiber surface treatment and lay pattern has an angle of contact exceeding 90°c which result good resistance to water and moisture ingress and hence does not promote capillary action. When tested as per IS, BS and ASTM standards the material exhibits excellent resistance to moisture absorption and is superior to materials like Calcium Silicate and Glasswool which are inherently hygroscopic in nature.

* All insulation materials degrade in their properties when water or moisture enters their body.

Sound Absorption
Excellent sound Absorption by virtue of its scientific fibre lay pattern ensuring controlled dispersion of air pockets and prices air flow resistance.

Sound absorption co-efficient of Rockloyd Slabs 48 Kg/m3 are furnished below:

Thickness in mm 25* 50* 25** 50**
Frequency 125 0.13 0.23 0.16 0.28
250 0.32 0.58 0.41 0.68
500 0.82 0.85 0.84 0.98
1000 0.95 0.96 0.96 0.97
C/S 2000 0.94 0.98 0.96 0.95
4000 0.76 0.94 0.92 0.94
NRC   0.84 0.79 0.89

* With rigid backing ** with 1" air gap

Fire Resistance
Totally Incombustible when tested as per IS: 3144 (Melting point of fibres is above 1000°c [1825°F])

Corrosion Protection
Rockloyd Fibres, in the first place, are devoid of impurities like Halides (Chlorides & Fluorides) and Sulphides which are commonly found in other materials such as Calcium Silicate. This is due to the fact that Rockloyd fibres are manufactured by a dry manufacturing process and its faint alkalinity, actually fights against corrosive reactions. It meets various critical specification including ASTM C795 requirements where specified.

This is feature is responsible for its exclusive selection for critical application such as Nuclear Power Plants. Ship building and Railways coaches where corrosion resistance is of vital significance.

Thermal Conductivity
Resin Bounded Rockloyd material is the only one to offer the LOW THERMAL CONDUCTIVITY to weight ratio when compared t block type insulants like Clacium Silicate. This minimizes the total load on the piping and equipment while maximizing thermal efficiency with a given thickness of usage.