We value your privacy

Our website uses cookies to enhance your experience. By continuing to use our website, you are agreeing to our use of cookies. Necessary cookies are always enabled. You can read more about our Cookie Policy in our Privacy policy

We value your privacy

FibreGlassDirect - Buy Fiberglass Supplies & Materials

Shopping Cart 0

TriRoof MultiFlex Overlay System Primer 5kg

In stock
£70.80 £59.00

You may have tried the rest, but now try the best Flexible Roof Overlay System on the market. TriRoof MultiFlex is designed to be easy to use with quick cure times and fire retardant (FAA rated). Suitable for everything from new builds to replacement roof overlays, TriRoof MultiFlex does it all.

The TriRoof MultiFlex Primer is used in conjunction with our TriRoof MultiFlex Resin. Better still, no need for various primers - this primer is suitable for 90% of substrates. The MultiFlex Primer requires a BPO paste to catalyse. (Available in related products below)

TriRoof MultiFlex is a 100% original formulation, only available from TriRoof. 

Advantages of TriRoof MultiFlex

  • Superior, flexible GRP technology suitable for both overlay and new deck applications
  • Can be applied to OSB3 and existing roof surfaces such as felt, asphalt, GRP and single ply
  • Suitable for application in temperatures as low as 1°C 
  • Walkable in 30-60 minutes
  • Fire tested to BS 476-3 Rating: F.AA and EN 13501-5(4)

Mixing the BPO Hardener

Mix the BPO until there are no red streaks.

Recommended BPO Hardener Addition Rate:

Temperature Gauge:

  • 2%: 18 - 30°C
  • 3%: 11 - 17°C
  • 4%: 5 - 10°C

Volume Gauge:

  • 20ml of BPO Catalyst per 1kg or Resin or Primer required for a 2% curing rate
  • 30ml of BPO Catalyst per 1kg or Resin or Primer required for a 3% curing rate
  • 40ml of BPO Catalyst per 1kg or Resin or Primer required for a 4% curing rate


5kg of Primer or Resin would require 100ml of BPO Catalyst at a 2% curing rate (100ml = 50gm tubes x 2)
It is not recommended to catalyse more than ~5 kg at a time. When working large areas decant the primer into manageable quantities and always be aware of your pot life


Hazard Statement - Multiflex Primer
Hazard Statement H226 - Flammable liquid and vapour.
H361d - Suspected of damaging the unborn child.
H335 - May cause respiratory irritation.
H372 - Causes damage to organs through prolonged or repeated exposure.
H315 - Causes skin irritation.
H319 - Causes serious eye irritation.
EUH208 - Contains COBALT NEODECANOATE. May produce an allergic reaction.
H412 - Harmful to aquatic life with long lasting effects.

Precautionary statements P210 - Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P241 - Use explosion-proof equipment.
P260 - Do not breathe dust/fume/gas/mist/vapours/spray.
P280 - Wear protective gloves/protective clothing/eye protection/face protection.
P302+P352 - IF ON SKIN: Wash with plenty of water/
P306+P360 - IF ON CLOTHING: rinse immediately contaminated clothing and skin with plenty of water before removing clothes.
P304+P340 - IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P403+P235 - Store in a well-ventilated place. Keep cool.
P403+P233 - Store in a well-ventilated place. Keep container tightly closed.
P261 - Avoid breathing dust/fume/gas/mist/vapours/spray.
P305+P351+P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P308+P313 - IF exposed or concerned: Get medical advice/attention.
P281 - Use personal protective equipment as required.
P370+P378 - In case of fire: Use
P321 - Specific treatment (see
P263 - Avoid contact during pregnancy and while nursing.
P201 - Obtain special instructions before use.

Multiflex Health and Safety
Ask a Question
Brand Description
History Color sit amet, consectetur adipiscing elit. In gravida pellentesque ligula, vel eleifend turpis blandit vel. Nam quis lorem ut mi mattis ullamcorper ac quis dui. Vestibulum et scelerisque ante, eu sodales mi. Nunc tincidunt tempus varius. Integer ante dolor, suscipit non faucibus a, scelerisque vitae sapien.