Andersen 20oz Foam Seal Insulation

Andersen’s specialized window and door foam sealant delivers what installers need most: low-pressure build technology that won’t bow or warp expensive frames during installation. At 0.8 psi at 95°F/75% RH — less than half the pressure of standard foams — this product prevents the frame damage that turns profitable jobs into warranty nightmares.

The 60-minute trim time changes the math on labor costs. Most foam sealants need 8-12 hours before trimming. This one’s ready in an hour, meaning crews can foam, trim, and finish in a single day instead of making return trips. For Montana’s short construction season, that efficiency matters.

Low-Pressure Performance Prevents Frame Damage

AAMA 812-04 certified pressure build testing shows the real numbers contractors care about. At typical summer conditions (95°F/75% RH), the foam exerts just 0.8 psi. Even in cold conditions where most foams become problematic (36°F/20% RH), pressure maxes out at 1.7 psi.

Temperature/Humidity	Pressure Build	Source
95°F / 75% RH	0.8 psi	AAMA 812-04
110°F / 10% RH	0.6 psi	AAMA 812-04
40°F / 85% RH	1.0 psi	AAMA 812-04
36°F / 20% RH	1.7 psi	AAMA 812-04

The cured foam remains soft and pliable, accommodating the constant expansion and contraction Montana buildings experience. Standard rigid foams crack and separate. This one moves with the structure.

Material Compatibility and Dimensional Stability

Chemically compatible with all Andersen product substrates (vinyl, wood, metal) — that’s not marketing fluff. Andersen tested this foam against their entire material ecosystem. No adverse reactions with their sealants, no warranty voids from chemical incompatibility.

Dimensional stability numbers back up the compatibility claims. 0.7% shrinkage at 104°F/90% RH tested to AAMA 812 standards means minimal gap formation over time. The foam maintains its seal through Montana’s temperature swings without pulling away from substrates.

Specification	Value
Compressive Strength	3.0 psi (ASTM D1621)
Shear Strength	7.3 psi (ASTM C273)
Tensile Strength	9.5 psi (ASTM D1623)
Elongation	18.9% (ASTM D1623)
Open Cell Content	<75% (ASTM 6226)

Installation Requirements and Performance Window

Application range runs from 40°F to 110°F, with optimal performance at 75°F. That covers most of Montana’s construction season. Pre-application requires shaking the can vigorously for at least 60 seconds and filling no more than 50% of the gap width to prevent over-expansion.

The service temperature limit of 240°F for cured foam handles any condition Montana throws at it. 18 months shelf life from manufacturing date means contractors can stock it without worrying about expiration.

Fire safety ratings meet commercial standards: Flame Spread 10 / Smoke Developed 20 (UL 723 / ASTM E84). ICC-ES ESR-1961 evaluation confirms its status as an insulating sealant.

FAQ

How fast can crews really trim this foam? Trimmable in as little as 60 minutes according to manufacturer specifications. Temperature affects cure time — cooler conditions extend it slightly.

Does this foam require special equipment? Yes. Foam applicator gun and foam gun cleaner are required but not included with the 20 oz can.

What’s the actual R-value? Approximately 4.5-5.0 per inch (based on comparable DuPont/Great Stuff Pro formulations).

How does warranty coverage work? Generally a 1-year limited warranty on the foam itself. More importantly, usage of this foam is highly recommended by Andersen to ensure the unit warranty remains valid.

Should installers mist with water? Mist with water if relative humidity is below 20%. Montana’s typically dry climate often requires misting for optimal cure.