RP Polyfiber Firm

Joint Sealants

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RP POLYFIBER FIRM HOT APPLIED SEALANT is formulated with selected polymer modified asphalts and polyester fibers in a proprietary blend consisting of a minimum 5% fibers by weight. Polyester fibers are high modulus low shrinkage fibers for use in industrial hot melt applications calling for high performance reinforcement. Polyester fibers demonstrate excellent dimensional, thermal and chemical stability, virtually no moisture absorption, high strength, outstanding abrasion resistance, tenacity and toughness. Pretreated in an adhesive activated version for excellent mixing and application of hot melt rubber systems.

RP POLYFIBER FIRM meets the requirements of several state and local overband specifications

Recommended Pour Temperature ....................................370 - 390 °F
Maximum Heating Temperature ................................................ 400 °F
Density ................................................................................9.0 lbs./gal
Penetration at 25 °C ..................................................................25 - 45
Softening point ...........................................................................195 °F
Ductility at 25 °C ................................................................. 10 cm min.
Asphalt Compatibility ........................................................Compatible
Flexibility, 1” 90° ..............................................................Pass at -20 °F
Length………………………………………………………………………..…1/4”
Crimps (D 3937)………………………………….………………………None
Tensile strength (D2256)…………………….…78,000 – 88,000 PSI
Denier (D1577)…………………………………………………….3.0 to 5.0
Specific gravity……………………………………………………………..1.38
Melting temperature…………………………………………478 - 490 °F

Use an agitated, oil-jacketed unit that has separate temperature gauges for both the sealant and the heat transfer fluid.  Take the plastic bag of sealant and load into the kettle one at a time.  Melt only enough material for the day’s activities.  Once melted, additional material can be added as needed.  Material can be safely reheated within the sealants service life. NOTE:  Prolonged heating of the sealant above the maximum safe heating temperature may cause it to gel in the kettle.

To facilitate proper adhesion, the joint or crack should be dry and clear of any dirt, dust, or other contaminates.  Substrate and ambient temperatures must be 40 °F or above.  Proper sizing of the joint will cause the maximum extension/compression to not exceed 50% of the width.  Joints or random cracks of ¼” or less are difficult to properly clean prior to applying the sealant.

The service life when heated to application temperature is approximately 12 hours. Adding fresh material to the melter as sealant is being used will extend the service life. Product shall be agitated during installation.  Any material that has exceeded the service life should be removed from the melter and discarded.

Coverage Width Coverage Depth Coverage Pounds/100 Lineal Feet
3/8"3/8"6.9
3/8"1/2"9.3
1/2"1/2"12.3
1/2"1"24.7
3/4"1/2"18.6
3/4"3/4"27.8

Packaging

30 lbs. per unit - 65 Units per Pallet - 1,950 lbs. per Pallet

35 lbs. per unit - 60 Units per Pallet - 2100 lbs. per Pallet