The Geyser Insulation pack consists of a foil faced Glasswool insulation blanket in a kit form that includes 5 x 1m, high density Glasswool Snap On Pipe insulation of 15mm ID bore x 20mm wall thickness and duct tape. Additional pipe insulation is available on request.


By insulating your geyser and pipes you can save up to 58% of the energy used by your geyser system.


Technical Data

Geyser and pipe insulation for:

  • Domestic
  • Commercial
  • Public sector buildings
  • Lifelong energy savings
  • Lightweight and easy to handle
  • DIY friendly
  • Maintenance free
  • Long product life - will not readily age
  • Suitable for high humidity applications
CorrosionWill not promote corrosion of steel, copper or aluminium.
Vermin ProofWill not provide sustenance for rodents.
Fire PropertiesGeyser blanket:

  • Non-combustible - tested to SANS 10177 Part 5
  • Class 1 fire index rating - tested to SANS 10177 Part 3
  • Class A1, s1, d0 according to EN 13823
  • Tested to ASTM E-84
  • Flame Spread Index: 20
  • Smoke Development Index: 5


  • Class 1 fire index rating - tested to SANS 10177 Part 3
  • Odourless, inert and fully compatible with all standard building materials and components
  • Will not promote corrosion of steel, copper or aluminium
  • Will not breed or promote fungi, mould or bacteria
  • Non-hygroscopic
Environmetal SustainabilityGeyser blankets are manufactured according to ISO 14001:2004.
Less material, less energy and less emitions

  • Zero ozone depleting potential (ODP)
  • Zero global warming potential (GWP)
Thermal PropertiesContributes to lifelong savings by reducing heat loss through the geyser and associated piping due to the inherent thermal insulation properties.

Geyser blanket thickness: 50mm of 12kg/m³ density. Snap-on Pipe insulation: 15mm pipe diameter x 25mm wall thickness of 88kg/m³ density.
Geyser Blanket Performance criteria:

  • K-value: 0.039 W/mK (ASTM C518)
  • Combustibility: Non-combustible (SANS 10177 Part 5)
  • Fire Spread index rating: Class 1 (SANS 10177: Part 3)
  • Fire Spread index rating: Class A1, S1 (EN 13823)
  • ASTM E-84, Flame Spread Index: 20, Smoke Development Index: 5
  • Reaction to fire: Euroclass A1 (EN 13501-01)
  • Snap On Pipe Insulation Performance criteria:
  • R-value = (min.) 1,00 (SANS 10400-XA:2011)
  • Fire Spread index rating: Class 1 (SANS 10177: Part 3)


  • Install 50mm thick foil faced, non-combustible, lightweight, glasswool Geyser blanket around the geyser or hot water cylinder
  • Seal the edges with binding tape
  • Using 15mm x 20mm Snap-on Pipe insulation; insulate 2m of the incoming cold water pipe and all outgoing hot water pipes
ConductivityK0.039W/m.K12kg/m³ Blanket
ConductivityK0.033W/m.K80kg/m³ Pipe

Install 50 mm thick, non-combustible, lightweight Glasswool “Geyser Blanket” around geyser or hot water cylinder. Seal edges with duct tape. Apply 2 m of 20 mm thick “Snap On Pipe” insulation on the incoming cold water pipes and insulate all outgoing hot water pipes.

Geyser blanket are manufactured according to ISO 9001:2008.

sharp blade may be needed for cutting

Store undercover, and in dry conditions. Handle with care, especially on the edges and corners, which can be damaged if subject to sharp impact. Do not apply excessive pressure, for example by standing or sitting on the product, as permanent damage may be caused.

  • Gently wipe the geyser with soft cloth to remove dust
  • Measure the circumference and length of the geyser and cut the geyser blanket to size allowing an additional 100mm overlap.
  • Wrap the cylindrical section of the geyser with the blanket, ensuring that the foil faces outwards.
  • Use a piece of binding tape (supplied) to secure the blanket and seal longitudinally along the joints.
  • Measure the diameter of the geyser end cap and cut two circular pieces of blanket allowing for an additional 50mm overlap.
  • Enclose each geyser end cap with the circular piece of blanket.
  • Secure and seal the cut circular piece of the blanket to the cylindrical section at each end with a binding tape.
  • Install snap-on-pipe insulation around the pipes running to and from the geyser.
  • From the geyser inlet, insulate the first 2m of cold water pipe and insulate all the hot water pipes. (mitre cut pipe sections at the bends)


As a “One-stop Insulation shop” Insulpro CC can offer insulation solutions across all temperature ranges and applications.


Tel: 011 835 2128 / 29 / 30
Address: 52 5th Street, Booysens Reserve, Johannesburg, 2091


Submission JHB