Description
ASI 5900 is a one-part, moisture-cure hybrid adhesive built on silyl-terminated polyether technology. It develops immediate green strength to fixture substrates in place while it cures, which reduces or eliminates braces, clamps, screws, and fasteners during assembly. It is 100% solids, free of solvents and isocyanates, and will not shrink during cure.
ASI 5900 bonds to wet substrates, cures in the presence of moisture, and will not wash off with rain. It stays consistent to dispense and tool from 0 degrees F to 150 degrees F, which makes it practical in cold shops and hot field conditions alike. Available in 10.2 oz cartridges and 20 oz sausage packs.
Key Product Details
| Property | Value |
|---|---|
| Chemistry | One-part hybrid, silyl-terminated polyether, moisture cure |
| Color | Natural White |
| Viscosity | 2,100,000 cps (Spindle 7, 4 rpm) |
| Gun Grade | Pass, non-slump |
| Skin Formation Time | 10 minutes at 70 degrees F, 50% RH |
| Cure In-Depth After 7 Days | 13mm at 70 degrees F, 50% RH |
| Hardness | 45 Shore A (ASTM C661) |
| Tensile Strength | 1.58 MPa (ASTM D412) |
| Lap Shear | 2.15 MPa (ASTM D412) |
| Elongation at Break | 150% (ASTM D412) |
| Modulus 100% | 1.42 MPa |
| Density | 14.8 lbs/gal (ASTM D1475) |
| QUV Testing | Pass, 10,000 hours (ASTM G154) |
| Application Temperature | 32 degrees F to 150 degrees F suggested. Can be applied below 32 degrees F with slower cure. |
| Dispensing Range | 0 degrees F to 150 degrees F |
| Service Temperature | -50 degrees F to 220 degrees F, intermittent to 270 degrees F |
| VOC Content | 9.55 grams/liter (ASTM D2369) |
| Packaging | 10.2 oz cartridge (24 per case), 20 oz sausage pack (12 per case). Pails and drums available. |
| Shelf Life | 12 months from date of shipment in cartridges, 6 months in pails and drums, stored at 70 degrees F and 50% RH |
| Compliances | California Proposition 65, USDA Requirements for Non-Food Contact, CARB and SCAQMD, VOC Compliant |
Panel Bonding in Kitchen, Bath, and Shower Work
Large format panel installation is the hardest test for any one-part adhesive. A full-size solid surface shower wall, a stone or porcelain shower panel, or a fiberglass surround has to go up, stay up, and hold position while the adhesive cures, without the crew standing there holding it or building temporary bracing.
ASI 5900 skins in 10 minutes at 70 degrees F and develops green strength immediately, so panels grab and hold in position quickly. The non-slump formulation keeps the bead in place on vertical and overhead surfaces, and the material stays flexible after cure to absorb movement and vibration between the panel and the framing or substrate behind it.
It also fits the enclosed-space problem. ASI 5900 contains no solvents, no isocyanates, and no acetoxy chemistry, so there is no acetic acid off-gassing and no vinegar odor during cure. That matters in a bathroom, shower surround, or any confined install where ventilation is limited and metal framing or fixtures are nearby.
How ASI 5900 Compares by Chemistry
| Adhesive Type | Behavior During Cure |
|---|---|
| ASI 5900 | 100% solids, will not shrink. Cures with moisture present without bubbling or washing off. No isocyanates. |
| Solvent based adhesive | Solvent flashes off during cure. Can leave behind roughly 60% of the material applied. |
| Water based adhesive | Loses volume through water loss during cure. Can wash off if water is present. |
| One-part polyurethane | Contains isocyanates. Can outgas and bubble when moisture is present before cure. |
Because ASI 5900 is 100% solids, what you apply stays in the joint. Shops switching from a solvent or water based product often reduce material consumption per joint without changing bead size or application method.
Performance in Production
- Immediate green strength fixtures substrates in place, reducing or eliminating bracing, clamping, and fastener use during assembly.
- Skins in 10 minutes at 70 degrees F and 50% RH. Tool the joint before skinning takes place.
- Non-slump, gun grade consistency holds position on vertical and overhead surfaces.
- 100% solids formulation does not shrink during cure.
- Bonds to wet substrates and cures in the presence of moisture without bubbling or washing off in rain.
- Ready to use with no mixing or additives.
- Stays consistent to dispense and tool from 0 degrees F to 150 degrees F.
- Remains flexible after cure to allow for vibration and movement between bonded parts.
- Passed 10,000 hours QUV testing under ASTM G154 for UV and weathering exposure.
- Higher temperature and humidity accelerate skin and cure time. Cold and low humidity slow it down, most significantly at 32 degrees F and below.
- Confined or fully enclosed joints will take longer to cure through in proportion to the degree of confinement.
- Allow 7 days for maximum strength before testing adhesion or strength.
- Surfaces must be dry and clean. Use 100% IPA or acetone for surface prep. Do not use petroleum based solvents.
- Priming is not normally required. Test unprimed adhesion with a small trial bead and allow 7 days.
- Clean wet adhesive with ASI 0240 Adhesive Remover and Cleaner. Cured material is removed by abrading or scraping.
- Do not use on polyethylene, polypropylene, or TPO without testing first. Test all paints before application.
- Allow treated wood and asphalt to cure 6 months before application. Long-term water submersion can cause loss of adhesion on some substrates.
Common Applications
- Shower panel and tub surround installation
- Large format panel bonding, including solid surface, stone, porcelain, and fiberglass
- Countertop and solid surface installation, bonding countertop to cabinet
- Wall stone and mirror mounting
- Panel assembly adhesive
- Trailer and RV manufacturing, roof bow adhesive
- Subfloor adhesive
- Roofing applications
- HVAC and duct applications
- Landscape block installation
- General construction and industrial manufacturing bonding
Common Bonding Substrates
Ceramics, fiberglass, glass, granite, marble, stone, porcelain, wood, EPDM, aluminum and galvanized metal, EPS or Styrofoam insulation, PVC and other plastics, and porous surfaces such as concrete and brick.
ASI 5900 can be used on substrates not listed here. The end user is responsible for testing the specific substrate and environment before use, since substrate composition varies by manufacturer.
Available Sizes
- 10.2 oz cartridge, Natural White, 24 per case
- 20 oz sausage pack, Natural White, 12 per case
- Pails and drums available. Contact [email protected] or call 800-220-1966.
See It in Action
ASI 5900 instant bonding demonstration, including cinder block and underwater brick bonding:
Frequently Asked Questions
What adhesive holds shower wall panels in place without bracing?
ASI 5900 develops immediate green strength and skins in 10 minutes at 70 degrees F, so large format shower panels grab and hold position while the adhesive cures. Its non-slump consistency keeps the bead from sagging on vertical surfaces, which reduces or eliminates the need for temporary bracing, clamps, or fasteners during install.
Can ASI 5900 be applied to damp or wet surfaces?
Yes. ASI 5900 is a moisture-cure adhesive and bonds to wet substrates. It can be applied when water or moisture is present without washing off the way water based adhesives do, and without the outgassing and bubbling that can occur with polyurethanes. Surfaces still need to be clean and free of contaminants.
Is ASI 5900 a silicone?
No. ASI 5900 is a hybrid adhesive based on silyl-terminated polyether technology. It contains no acetoxy chemistry, so it does not release acetic acid or give off the vinegar odor associated with acetoxy RTV silicones during cure. It is also paintable, which most silicones are not, though all paints should be tested before application.
Should I use ASI 5900 or ASI 6900?
Use ASI 5900 for bonding countertops to cabinets and for shower, wall, and large format panel work. Use ASI 6900 for undermount sink installation, where it can replace epoxy and clips. ASI 6900 has almost three times the green strength of ASI 5900, which is what makes it suitable for hanging a sink under a slab.
How long until ASI 5900 reaches full strength?
Strength begins developing immediately and continues to build for 7 days after application. ASI recommends testing strength and adhesion on the seventh day. Cure in-depth after 7 days is 13mm at 70 degrees F and 50% RH. Lower temperature and lower humidity slow both skin and cure times.
Will ASI 5900 bond to plastic?
It bonds to PVC and a range of other plastics, along with fiberglass, EPS and Styrofoam insulation, and EPDM. Do not use it on olefins such as polyethylene, polypropylene, or TPO without testing first.
What is the shelf life?
Cartridges have a 12 month shelf life from date of shipment when stored at 70 degrees F and 50% RH. Pails and drums are 6 months. High temperature and high humidity in storage will significantly reduce shelf life.
Related Products
- ASI 6900 Extreme Grab Hybrid Adhesive for undermount sink installation
- ASI 55 Multi-Purpose Hybrid Sealant and Adhesive
- ASI 57 High Performance Hybrid Sealant
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