Reversol P-9728 P is a rigid, medium reactivity, isophthalic unsaturated polyester resin which is thixotropic, and non-air inhibited and promoted. It is designed for ambient temperature cure with Methyl Ethyl Ketone Peroxide (MEKP). Reversol P-9728 P has good chemical resistance particularly to acid solutions and has good long term water resistance.. Due to its promoted stage, Reversol P-9728 P have poorer storage stability than its’ unpromoted version (Reversol P-9728). Reversol P-9728 P is encouraged for use in high stock-turning job pattern and should not be kept more than 3 months under tropical condition.

Available Documents

TDS Download

Technical Informations

Application Advice/Typical Applications

Chemical resistant tanks and pipes FRP boat construction

Shipping and Storage

To ensure maximum stability and maintain optimum resin properties, Reversol P-9728 P should be stored in closed containers below 32°C and away from heat sources and sunlight. All storage should conform to local fire and building codes. Drums should be stored away from all sources of flame or combustion. Inventory should be maintained at minimum reasonable stock and used on a first-in-first-out basis. When properly stored, Reversol P-9728 P will remain stable for 3 months from date of delivery.

Product Security/Health and Safety

Before handling, please read the Safety Data Sheet of this product for advice on safety, use and disposal.

Effluents and Pollution Control

Before handling, please read the Safety Data Sheet of this product for advice on safety, use and disposal.

For further information regarding this product please refer to:

Synthomer Limited Head Office
Phone: +44 (0)1279 436 211
FAX: +44 (0)1279 444 025


Character Value Unit
Appearance Pinkish brown  
Non-Volatile 54 ± 2
Viscosity@ 25 °C - Brookfield #3/60 450 – 600 cps 
Thixotropic Index @ 25ºC - #3 1.5 – 2.8 6 and 60 rpm 
Geltime at 25°C - 1% MEKP 24-30 minute 
Acid Value 25 mgKOH/g 
Specific Gravity 1.1  
Volumetric Shrinkage 9
Tensile Strength 76 MPa 
Tensile Modulus 3930 MPa 
Elongation at Break 3.7 MPa 
Flexural Strength 117 MPa 
Compressive Strength 159 MPa 
Deflection Temperature (under load 1.80 MPa) 61 °C 
Barcol Hardness 32  

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