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Spray Foam Insulation


Introduction
Frequently Asked   Questions
 Technical Data
 Sheets
AGRISPRAY OS
DURATHERM OS
Bridge Infill Case Study
PIRTHANE ‘‘O’’
Soffit Insulation Case
   Study
TECHNITHERM
Wall Tie Replacement -
   Insulation Case Study
THERMADEK 40 LK
Digester Insulation Case
   Study

Thermadek Winter
   Grade

Winter Application
   Case Study 1
Winter Application
   Case Study 2

AGRISPRAY OS Spray foam system

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Product Description

AGRISPRAY OS is an HCFC AND CFC FREE two component, 1:1 ratio, rigid foam system which when processed through suitable spray machinery ( Gusmer, Glas-Craft/Probler etc ) will produce a rigid foam of approximate density 35kg/m3 with exceptionally good compressive strength. Service Temp range -15oC to 70oC. When tested to BS476 part 7 the foam achieves a Class 1 surface spread of flame.

Uses

AGRISPRAY OS is used for insulation in:

  • Exterior or interior of agricultural buildings
  • Ocean going yachts/canal barges
  • Internal industrial roofing
  • Domestic slate or tiled roofs

Standard AGRISPRAY OS should not be used on substrates below 5oC. When used externally the foam must be protected from ultra-violet radiation and atmospheric degradation by a suitable elastomeric coating, e.g. ISOTHANE EM.

Equipment

AGRISPRAY OS can be processed through all standard foam spray machines. The machine should be capable of maintaining the mix ratio at ±2% accuracy and controlling the component temperatures at 40-50oC (variable).

Recommended machine settings

Block Temperature

Minimum, operating 100-120°F / 40-50°C
Hose Temperature Minimum, operating 100°F / 40°C
Chemical Pressures Minimum, operating 500 psi,
 

not greater than 200 psi
difference iso / res

Spray Techniques

The guidelines in Isothane Limited’s standard specification should be followed but the general requirements are as follows.

  • The substrate should be clean, dry and free of dirt, grease, oil and loose particles.
  • In certain cases primer may be necessary to maximise adhesion.
  • Climatic conditions must be suitable for spraying with regard to humidity and wind velocities.
  • The foam should be built up in passes of not less than 15mm and not more than 10 minutes should elapse between passes.
  • The requirements of any relevant Agrément Certificates or British Standards should be followed.

Physical Properties

AGRISPRAY OS is a two component, modified polyurethane rigid foam which, sprayed through suitable foam machinery, gives a product of nominal density 35 kg/m³.

Laboratory test results (typical):-
 
 
Cream time
3-4
seconds
Tack free time
12-18
seconds
Rise time
25-36
seconds
Free rise density
24-26
kg/m³

Storage, Handling and Personal Protection

The recommendations in our Safety Data Sheet for this product must be followed at all times. More general information is included in our publication “A Guide to the Safe Handling of Polyurethane Chemicals” and in the following Technical Data Sheets which are available on request:-

  • Fire safety when Storing, Handling and Installing Polyurethane Foam.
  • Decontamination of Isocyanates using Isothane Decontaminant.
Typical Properties Of
DURATHERM Foam Core
Value Test Method
Core density 35 kg/m³ BS4370
Compressive strength - Parallel to rise 200 kpa BS4370
Tensile strength - Perpendicular to rise 110 kpa BS4370
Shear strength - Perpendicular to rise 145 kpa BS4370
Close Cell Content 92 % min. ASTM D2856
Thermal Conductivity -10°C Mean – Initial 0.020 W/mK ASTM C518
- Aged 0.026 W/mK (ANACON)
Water Absorption - 7 days no head 0.24 kg/m² ASTM D2126
Water Vapour
Transmission- 25mm, 38° C, 88% RH
3.9 ng/Pa.sm

BS4370
Dimensional Stability - 7 days @ -15° C -0.6% vol. ASTM D212
(Linear Change) - 7 days @ 70° C, 95% RH +5.0% vol.  
Ozone Depletion Potential ZERO  

Burning Characteristics – These are laboratory scale tests and bear no relation to the performance of the material in a real fire situation. Care must be exercised in the end use to satisfy the demands of the Fire Authorities, and moral obligations to the safety of persons and property.
Extent of burn <25 mm BS4735-74
Surface spread of flame Class 1 BS476 pt. 7-87