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Tremco Spectrem 1 20oz Sausage Precast White
Tremco Spectrem 1 Precast White is a single-component, moisture-cure, ultra-low modulus silicone sealant in a 20 oz sausage for aluminum curtainwalls, precast concrete panels, metal panels, and window perimeters. Excellent adhesion to hard-to-bond substrates lets it serve perimeter caulking through expansion joints with one product.
- Delivers +100/-50% movement capability in demanding perimeter joints.
- Works with Spectrem Simple Seal and Proglaze ETA transitions.
- Shields joints from water penetration in all climate zones.
$15.02
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Spectrem 1 Precast White, 20 oz sausage
Tremco Spectrem 1 is a high-performance, single-component, moisture-cure, ultra-low modulus silicone sealant. It is used on dynamically moving joints in aluminum curtainwalls, precast concrete, metal panels, and window perimeters. Ultra-low modulus holds +100/-50% movement, and a slight grain finish lets the bead zipper rather than fully tear if a joint fails.
Key Features
- High-performance moisture-cure silicone
- +100/-50% movement on demanding joints
- One product from perimeter caulk to expansion joints
- Excellent adhesion to polyethylene-backed air barriers
- Compatible over Nudura ICF
Applications
- Dynamically moving joints in curtainwall and metal panel work.
- Precast panels with high linear expansion.
- Perimeter joints at windows.
- Spectrem Simple Seal and Proglaze ETA transitions.
Technical Specifications
| Property | Value |
|---|---|
| Sealant type | ASTM C920 Type S, Grade NS, Class 100/50 |
| Sausage size | 20 oz (600 mL) |
| Color | Precast White |
| Joint movement | +100% / -50% (ASTM C719) |
| Hardness (Shore A) | +15 (ASTM C661) |
| Tooling time | 10 to 20 min (skin formation) |
| Tack-free time | 30 to 60 min (ASTM C679) |
| Cure time | 7 to 14 days |
| Full adhesion | 14 to 21 days |
| Peel strength, aluminum and glass | 30 pli (5.2 kN/m), ASTM C794 |
| Tensile at 100% elongation | 35 psi (0.24 MPa), ASTM C1184 |
| Tensile at max elongation | 200 psi (1.38 MPa), ASTM D412 |
Documents
Spectrem 1 Technical Data Sheet
Frequently Asked Questions
What air barrier membranes does Spectrem 1 bond to when detailing over ExoAir?
Tremco names it the recommended sealant over the ExoAir Air Barrier system for an airtight envelope seal, with excellent adhesion to most polyethylene-backed, self-adhering membranes. Performance is exceptional on the polyethylene face of ExoAir 110, 110AT, and TWF and on the cured surface of ExoAir 130 and 230.
What tooling and tack-free times should a crew expect with Spectrem 1?
Tooling time, measured as skin formation, is 10 to 20 minutes, and tack-free time is 30 to 60 minutes under ASTM C679. Cure takes 7 to 14 days, and full adhesion develops in 14 to 21 days.
What joint movement can Spectrem 1 take on curtainwall and precast joints?
It is rated +100% / -50% under ASTM C719 and meets ASTM C920 Type S, Grade NS, Class 100/50, Use NT, M, G, A, and O. Its ultra-low modulus, with Shore A hardness of +15 and 35 psi tensile at 100% elongation, suits high-expansion materials such as aluminum curtainwalls, precast concrete panels, and metal panels.
What does the slight grain finish of Spectrem 1 do in a joint?
The slightly grainy texture lets the sealant zipper rather than fully tear if failure occurs. Tear strength (Die C) is 40 pli (0.7 kN/m) under ASTM D624, and peel strength on aluminum and glass is 30 pli (5.2 kN/m) under ASTM C794.
What surface conditions and exposures limit Spectrem 1?
Tremco says not to apply it to damp or contaminated surfaces, and it is not intended for continuous water immersion. Once cured, it resists driving rain, ozone, ultraviolet light, and temperature extremes, and it should be used with adequate ventilation.
What certifications support Spectrem 1 on hospital and school projects?
Greenguard Gold certification supports use in sensitive indoor environments, including hospitals and schools. It also meets TT-S-001543A Class A and TT-S-00230C Class A, Type II, shows no stain on white marble under ASTM C1248, and has been tested in wall assemblies meeting ASTM E2357 air leakage and NFPA 285.
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