Product Description :100% Chemical resistance.

Uses: Staroxy CR 90 is the best bet for chemical, solvent and heat resistance among all Staroxy range of products. Novalac is a multi functional high cross link density epoxy matrix, where as the conventional epoxy is based on di-functional Bisphenol A technology. Because of its high cross link density.Staroxy CR 90 is a high solids novalac epoxy coating for concrete, masonry or steel where chemical and thermal protection is required. Staroxy CR 90 is designed for service in harsh chemical environments.

Features :
 Excellent chemical resistance  High Temperature performance  Cures at low temperature  Excellent solvent resistance  Improved wear resistance

Direction to use:

 Before primer application, CDS (Clean, Dry & sound) test is conducted on the concrete.
 Moisture test is conducted by moisture meter or plastic sheet method (ASTM D4263: Standard test method for indicating moisture in concrete). The residual moisture should not be more than 4-5%
 Surface preparation like scarification, grinding or shot blasting is done to achieve a surface profile of 150-100 microns.
 Apply Staroxy 11 / 12 as the primer.
 Mix Staroxy CR 90 resin and hardener in the recommended ratio of 2:1 by volume with a low speed drill for atleast 2-3 minutes. Accurate mix ratio is critical for performance and cure.
 Apply by brush, spray or roller. Can be sprayed with airless or conventional spray. Allow to cure for 6 -7 hours. Re – coat within 24 hours. Full chemical cure needs 7 days.

On metals:  Ensure that the surface is free from rusting, oil and other contaminants.  Sanding and greasing is done prior to primer application.  Apply Staroxy 21 / 23 as primer and allow to dry for 5-6 hours.  Mix Staroxy CR 90 resin and hardener in the recommended ratio of 2:1 by volume with a low speed drill for atleast 2-3 minutes. Accurate mix ratio is critical for performance and cure.  Apply by brush, spray or roller. Can be sprayed with airless or conventional spray. Allow to cure for 6 -7 hours. Re – coat within 24 hours. Full chemical cure needs 7 days.

Physical Characteristics :
Chemical Type: Two component, amine adduct cured with epoxy phenolic novalac.
Mixing ratio(R:H): 2:1 by volume
Colour: Clear
Volume solids: 75%
Pot life 30 minutes at: 27C
Finish Clear :gloss
Surface dry 3-4 hours
Tack free dry 8 hours
Hard dry 24 hours
Coverage / m2 at 200 microns 3-3.5 sq.m / litre
Recommended DFT: 200 micron
Shelf life: 12 months in the unopened container.

Storage & Self Life:
It should be kept in a cool, well ventilated area, away from heat, direct sunlight, sparks and children. Use the mix solution within the pot life time.

Handling & Safety
Observe reasonable care and employ ordinary hygienic principles such as washing the hands with soap and water before eating or smoking. It is recommended to wear gloves, goggles and nose masks while application. Incase of splashes on the skin, dampen the cloth with thinner and wipe the hands with the cloth. Wash then with soap and water. Dried film is non toxic.

Download to Safety Data Sheet