MARSHLAND Crack Filler Sealant Foam Backer Rod Roll 20mm Thickness 30 Meter Length Crack Filler  (30 L)

• Backer Rod:- Crack Filler backer rod is unique; it can easily compress and return to its original unrestricted air movement. This flexibility makes it easily conform to sealing applications and helps limit the depth of the sealant while also adding good sealant airing, which can reduce drying or set up time. • Backer Rod:- Sealants, other materials will stick more easily to closed cell backer rods which have a better bonding surface area than an Crack product. • Backer Rod:- Common uses: Glazing installations, Window and door applications, Expansion joints, Curtain wall joints, Partitions, Log construction, Pavement joints and repairs, Contraction and expansion joints of concrete highways, Runways, Driveways & Parking Lots. • Backer rod:- Increase elasticity in the joint sealant. Reduce caulk consumption by controlling sealant depth— this prevents excessive use of caulking or sealant. • Backer Rod:- Perfect for filling cracks in concrete prior to using crack sealant Warranty is not applicable for this product Fills large gaps and openings to prevent drafts.