|32 13 73.16|
Modified, Hot-Applied, Single Component Polymeric Joint Sealant
3405-Modified Low-Modulus Polymeric Compound is a quality, hot-applied, single-component sealer designated to effectively seal cracks and joints in both Portland cement and asphalt concrete surfaces. Provides a soft, flexible crack and joint sealer that remains pliable. Will not become brittle and crack in cold weather, nor track in warm weather.
Bond, 3 cycles @ -20ºF (-29ºC),
Wt. per gallon, lbs.
Viscosity, CPS @ 380ºF
|Recommended Pouring Temp.: 370ºF (188ºC)|
Maximum Safe Heating Temp.: 390ºF (199ºC)
55 lb. cartons containing two 27.5 pound blocks individually wrapped in poly bag liners.
Melting…3405-M should be melted in an oil-jacketed melter/applicator equipped with an agitator and separate temperature thermometers for oil bath and melting vat.
Surface Preparation…The joints and cracks to be sealed must be clean and dry. Dust, dirt and laitance should be removed prior to application. Proper routing should be slightly larger than existing crack/joint to ensure proper adhesion to sidewalls. NOTE: Application of sealant into frozen or wet pavement will result in loss of bond and premature failure of the sealant.
New Concrete Pavement Sealing…Typical joint configuration should be 3/8″ (9.54mm) wide with a minimum 1/2″ (12.7mm) depth for an approximate 1:1 width-to-depth ratio. Designated joint width and depth is determined by the appropriate highway or pavement authority. CERA-ROD™ Heat-Resistant Backer Rod from W. R. MEADOWS may be installed in the joint opening to control depth and sealant usage.
Ashphalt Pavement and Maintenance Sealing…For ideal sealing, with maximum effectiveness, it is suggested that cracks or joints should be routed out to provide a sealant reservoir 1/2″ (12.7mm) wide with a minimum depth of 1/2″ (12.7mm). This provides for a 1:1 width-to-depth ratio. For joints 1″ (25.4mm) wide, the suggested depth is 1/2″ (12.7mm) minimum. To control and maintain the suggested joint depth and sealant usage, CERA-ROD Heat-Resistant Backer Rod from W. R. MEADOWS may be installed in the joint opening.
Application Method …Sealing may be done at air temperatures of 40ºF (4ºC) or higher. 3405-M should be applied into the crack/joint, slightly overfilling. Once applied, a follow-up should be done with a soft rubber, U-shaped squeegee to form a wipe zone of approximately 3-4 inches (76.2-101.6mm) wide along the crack/joint and flush with the highway or pavement surface.
Do not heat material to over 390ºF or polymer degradation and gelling may occur. Reheating or prolonged heating (in excess of 6 hours) without the addition of fresh material could cause the material to gel in the application equipment. A rapid increase in viscosity or stringiness signals the approach of gelling and the material should be promptly discarded. Refer to Material Safety Data Sheet for complete health and safety information.
This material last updated July, 2004.