What is bitumen rubber mastic joint sealant?

Mar. 10,2020

What is bitumen rubber mastic joint sealant?

What is bitumen rubber mastic joint sealant?

 Bitumen rubber mastic sealant is a single component and cold applysolvent based bitumen rubber mastic joint sealant. 

The sealant on curing formsa tough and flexible seal. it has excellent adhesion to concrete, brickwork,asphalt and most construction material substrates. 

The mastic sealant ismodified with non-asbestos fibers to make the sealant thixotropic and slumpfree when applied on vertical areas.Crack Filler , Crack Repair , Asphalt Crack Filler , Crack SealantCrack?sealant isgeneral term for materials which are used to fill and thereby sealcracks and joints in asphalt and cement pavementsurfaces. Crack repair materials are sometimes also referred to inthe art by terms such as, for example: hotpour; crack seal; crack sealer; crack sealant; crackfill; crack filler; joint seal; joint sealer; jointsealant; joint fill; joint filler; cold joint adhesives; marker adhesives; andother asphalt/resin/polymer compositions. 

Throughout the present specificationand in the appended claims, the term “crack sealant” will be usedexclusively, but the term should be understood to encompass all materialshaving the same general composition, use and/or properties. AsphaltCrack filler is widely used to fill and thereby seal cracks andjoints in highways, streets, parking lots and driveways from water penetration. 

The use of crack sealants prolongs the service life of suchpavement surfaces.Application of bitumen rubber mastic joint sealant:Flexible joint sealantStability at high ambient temperaturesExcellent adhesion, strong durable bondSingle componentWhere you can use the bitumen rubber mastic joint sealant?Bitumenrubber mastic joint sealant is ideally suited for sealing andfilling gaps and joints on roofs, pointing horizontal chases for waterproofingmembranes and felts. Sealing around roof/ wet service pipes.  Pointingbetween brickwork and roof flashings. Sealing cracks in asphalt and concretepavements.

Filling horizontal joints in concrete and asphalt where movementsare not expected.How to use bitumen rubber mastic joint sealant?Surface preparationSurface must be free from all dirt, dust and loose material. Any oiland grease contamination  must be removed completely. 

The surface must bemade dry prior to the application of the sealant.MaskingPrior to application of primer and sealant, apply masking tape to theadjacent sides of the joints for getting a neat finish and to avoid thespilling over of the sealant on the edges.PrimingUnder normal circumstances priming is not required. However, for verydry and porous surfaces, it is recommended to apply one coat of a solvent basedbitumen primer. Similarly for joints subjected to continuous immersion, primingis recommended.


The bitumenrubber mastic joint sealant can be applied by means of aspatula or trowel. As the product is solvented, it is recommended to mix thecontents of the pail with a paddle mixer for a few minutes prior to theapplication to ensure a homogenous mix. Sealant application should start formthe bottom of the joint/groove and continued to the top. Immediately tool thejoint with the spatula or putty knife to smoothen and compress the sealant toeffect total contact with joint surfaces. The putty knife shall be moistenedwith a cleaning solvent to prevent the sealant to adhere to the knife andensuring a smooth and neat finish. Where masking tape has been employed to keepbuilding surfaces clean, it is advisable to remove them at the moment thesealant filling is completed.

Hot bitumen poured crack filler sealant

Hot Crack Filler is a single component, hot-applied, rubberized asphalt crack and joint sealant.Hot Crack Filler is specially formulated for both direct fire and oil-jacketedmelters. It is heat stabilized to withstand temperatures up to 450oF without experiencing polymer degradation. When melted and properly applied it forms aresilient crack sealant for both asphaltic and cementations pavements.Curing time of bitumen rubber mastic joint sealantThe sealant cures on solvent release. The initialsurface skinning will occur within 24-48 hour, however full cure depends onrelative humidity. 

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