Interplastic Corporation makes no warranties regarding any material and/or samples described in this report. All properties
specified above are approximate and may vary from material delivered. Delivered material complies with the certificate of
analysis on each shipment of product. Interplastic Corporation makes no representations of fact regarding the material
except those specified above. Final determination of part or application and the suitability of the material for the use
contemplated is the sole responsibility of the buyer. Our technical sales representatives will assist in developing procedures
to fit individual requirements as a customer accommodation, but all advice is accepted at your risk and should be checked for
suitability to your particular processes and needs. These test data and properties are based on results obtained for a specific
material under the specified test conditions – they are not to be used as specifications and are not warranted as performance
attributes for any product or system.
INTERPLASTIC CORPORATION
2015 Northeast Broadway Street
Minneapolis, Minnesota 55413-1775
651.481.6860 Fax 612.331.4235
www.interplastic.com
Revised: 8/2022
PF-228-532 is a fiberglass-reinforced polyester fillet putty. It is designed specifically for bonding FRP parts and
forming contours that require added reinforcement. This putty offers excellent adhesion and shear strength. PF-228-
532 may be used for general bonding and to fill cracks, corners, and angles where reinforcement is needed.
FEATURES BENEFITS
Strong and Tough Adhesive Excellent adhesion to FRP
Good Hydrolytic Stability Long life, especially in marine applications
Void-Free Consistency, Minimizing Air Entrapment Does not have weak spots due to voids
Reinforced Excellent impact resistance
LIQUID PROPERTIES RESULTS
Viscosity @ 77 F (25 C), Brookfield RV T-E Spindle @ 5 rpm, cPs 340,000
100 grams compound @ 77 F (25 C), initiated with 2% L-50A by weight*
Gel Time, minutes 13
Percent HAPs (Styrene) 22
HAPs Content, lbs/gallon 2.0
Weight per Gallon @ 77 F (25 C), lbs 9.0
Specific Gravity @ 77 F (25 C) 1.08
* Gel time and reactivity will vary due to the type and concentration of Free Radical Initiator (catalyst), shop
temperature, humidity, and type of fillers used. In order to meet your individual needs, consult our technical sales
representative for assistance.
Application: PF-228-532 may be used for general bonding and to fill cracks, corners, and angles where
reinforcement is required. There can be issues with achieving a good bond to highly cured gel coat and gel coated
parts. In cases where the gel coat is over a month old, has been post-cured, or could otherwise be highly cured, the
user should test for adequate adhesion and may need to sand and clean the part before applying the adhesive
material.
Storage and Handling: PF-228-532 should be properly stored in closed, opaque containers at temperatures not
exceeding 77 F (25 C). Store only in original containers. To avoid decomposition keep away from direct sunlight and
excess heat. Refer to the Safety Data Sheet for further details on safety and storage.
PF-228-532
COR-Grip Fillet Compound
Technical Data Sheet