Name: Rubberized Asphalt Hot-Applied Sealant Base RAHA-200
Brand: Coatingsink
SKU: rubberized-asphalt-hot-apply-base
Availability: InStock

Question 1

How does SBS modification improve performance over straight-run asphalt sealants?

Accepted Answer

Styrene-Butadiene-Styrene (SBS) block copolymer forms a three-dimensional network within the asphalt matrix, significantly improving elastic recovery, low-temperature flexibility, and resistance to rutting at high pavement temperatures. The result is a sealant that returns to its original shape after traffic-induced deformation — a critical requirement for airport runway and highway joint sealants evaluated under ASTM D3405 and FAA P-605 specifications.

Question 2

What is the correct melter temperature and application procedure for RAHA-200?

Accepted Answer

Melt RAHA-200 in an oil-jacketed or direct-fire melter at 175–200°C with continuous agitation. Do not exceed 220°C, as prolonged overheating degrades the SBS network and increases carbonisation risk. Clean and dry the joint or crack to be sealed, apply a tack coat of emulsion primer if specified, then pour or extrude the molten sealant to slightly overfill, striking off flush once partially cooled. Allow 20–30 minutes for full set before opening to traffic.

Question 3

Is RAHA-200 suitable for bridge expansion joints as well as pavement cracks?

Accepted Answer

RAHA-200 is optimised for pavement crack and joint sealing (widths up to 25 mm). For bridge expansion joints subject to high cyclic movement, a cold-applied polyurethane or silicone sealant with higher elongation is typically required. RAHA-200 can be used for bridge approach slabs and asphalt overlay joints where movement is limited and hot-pour installation is practical.

SBS Modifier Content	18–22%
Application Temperature	175–200°C
Softening Point (ASTM D36)	95–110°C
Elastic Recovery (ASTM D6084)	≥75%
Penetration at 25°C (ASTM D5)	60–90 dmm

Rubberized Asphalt Hot-Applied Sealant Base RAHA-200

Specifications

FAQ

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