Product Data Sheet Show all documents

SikaBond®-620

(formerly MWeld 620)

VERSATILE ONE COMPONENT, ELASTOMERIC ADHESIVE/SEALANT

SikaBond®-620 is a multi-purpose, elastomeric adhesive/sealant that provides excellent performance on a wide variety of substrates and applications.

  • One component formulation provides enhanced application efficiency
  • Withstands 25% total joint movement for use on moving joints and seams
  • Bonds similar and dissimilar materials, including aluminum, glass, vinyl, ceramic, porcelain, plastics, rubber, painted metals, wood, fiberglass, and composite materials, providing job site versatility
  • Fast drying and tack-free in as little as 25 minutes for faster project completion
  • Paintable within minutes to minimize process time and labor cost
Product Data Sheet Show all documents

Usage

  • Assembly of Metal buildings and metal roofing
  • Assembly of Manufactured housing
  • Various truck, bus, and trailer assemblies
  • Railcar and cargo container assemblies
Location
  • Interior and exterior
Substrate
  • Aluminum
  • Glass
  • Vinyl
  • Ceramic
  • Porcelain
  • Plastics
  • Rubber
  • Wood
  • Fiberglass and composite materials

Advantages

  • One component formulation provides enhanced application efficiency
  • Withstands 25% total joint movement for use on moving joints and seams
  • Bonds similar and dissimilar materials, including aluminum, glass, vinyl, ceramic, porcelain, plastics, rubber, painted metals, wood, fiberglass, and composite materials, providing job site versatility
  • Fast drying and tack-free in as little as 25 minutes for faster project completion
  • Paintable within minutes to minimize process time and labor cost

Packaging

313 mL cartridges (10.3 fluid ounces), 24 cartridges per case

Brush grade is also available in 1 gallon cans.

Color

Available in clear, white, slate, and black; for availability of other colors, contact Sika Customer Service.

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Federal Specification TT-S-00230C, Type II, Class B
  • ASTM C920, Types Grade NS, Class 12.5 use NT, M, A, and O
Product Information

Chemical Base

SikaBond®-620 is a co-polymer sealant/adhesive.

Shelf Life

Cartridges: 24 months

Storage Conditions

Store below 120° F (49° C).

Density

8.2 ±0.1 lbs/gallon

(ASTM D 1475)
Technical Information

Shore A Hardness

50 ±5

(ASTM C 661)

Tensile Strength

325 ±25 psi

(ASTM D 412)

Elongation at maximum tensile stress

550 ±50 %

(ASTM D 412)

Movement Capability

Bond durability

25% total joint movement

(ASTM C 719)

Adhesion in peel

27 ±3 pli

(ASTM C 794)

Resistance to Weathering

No change, xenon arc, 500 hours

(ASTM C 793)

Application

Application Information

Extrusion rate

40–45 grams/second

(ASTM C 603)

Sagging

None

(ASTM C 2202)

Cure Time

Tack-free: 25 ± 3 minutes
Paintable: Within minutes
Handleable: 16–24 hours
Full cure: 14 days
All times listed are dependent on temperature and humidity. Times referenced above assume 70° C (21° C) F and 50% relative humidity

Skin Time / Laying Time

25 ±3 minutes

(Industry method)

Tack Free Time

25 ±5 minutes

(ASTM C 679)
Consumption

Coverage

A 313 mL cartridge seals 24 linear feet in a 1/4 by 1/4" joint.
Application steps

NOTES ON INSTALLATION

  • Joints should be designed to a maximum of 1/2" by 1/2".
  • When using SikaBond®-620 between windows and mortar or as an expansion joint seal, the use of backup material is necessary to provide the maximum 1/2" joint depth.
  • SikaBond®-620 is a flexible adhesive/ sealant designed for dynamic joint movement; consequently, the application of brittle paints may cause surface cracking.
  • SikaBond®-620 bonds well to most substrates, however, it is strongly recommended to check the adhesion of the cured sealant on specific substrates.
  • Make certain the most current versions of the product data sheet and SDS are being used; call Customer Service to verify the most current version.
  • Proper application is the responsibility of the user. Field visits by Sika personnel are for the purpose of making technical recommendations only and not for supervising or providing quality control on the jobsite.

SUBSTRATE PREPARATION

Surfaces must be dry and free of dirt, dust, debris, grease, peeling paint, and any contaminants that could inhibit adhesion. Surface temperature must be above 40° F (4° C) for best results.

APPLICATION

  1. SikaBond®-620 is a solvent-borne synthetic rubber adhesive specifically formulated to provide long-lasting bonds for sealing manufactured housing, metal buildings, RV’s, trucks, trailers, buses, and around openings in door windows and air conditioners. SikaBond®-620 bonds to a wide variety of substrates and is especially suited for waterproofing roofs, sidewall lap seams, bonding roof bows, waterproofing rivet seams, and general-purpose use.
  2. SikaBond®-620 comes ready to use. Do not open cartridges until preparatory work is completed. Cut the nozzle to create the appropriate size bead. Puncture the inner seal at the base of the nozzle. Apply bead, forcing SikaBond®-620 against the interfaces to be sealed to ensure full contact adhesion. Do not introduce air pockets to adhesive/sealant beads.
  3. If necessary, SikaBond®-620 can be tooled immediately with a putty knife dampened with mineral spirits.
  4. To ensure solid, positive adhesion, temporary bracing or mechanical fasteners may be required until the adhesive cures.

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